C.T. Brues.
On Paraperipatus lorentzi Horst and other species of the Genus from New Guinea and Ceram.
Psyche 28:50-53, 1921.

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19.211 Brues-On Paraperipatus Lorentzi Horst 53 - *
LITERATURE.
Bouvi6r, E. L.
'14. Un nouveau Paraperipatus de Ceram. Bull. Mus. Hist. Nat., Paris, vol. 20, pp. 222-226.
Heymons, R.
'12.
Eine neue Peripatusart (Paraperipatus schultzei aus 'Sew Guinea. SB. Gesellsch. naturf. Fr., Berlin, Jahrg. 1912, pp. 215-222.
Horst, R.
'10. Paraperipatus lorentzi Horst, a new Peripatus from Dutch New Guinea. Notes Leyden Mus., vol. 32,pp. 217-218. Horst, R.
'11. Paraperipatus lorentzi nov. sp. Ris. Expkd. Sci: Neerland- aise A la Nouvelle Guinhe, vol. 9, pt. 2, Zool., pp. 149-154, pi. .5.
Muir, F: and Kershaw, J. 0.
'09. Peripatus ceramensis n. sp. Quart. Journ. Micro. Sci., v01. 53, pp. 737-740, pi. 19.
Sedgwick, A,
'10. Peripatus papuensk -Nature, vol. 83, pp. 369-370. Willey, A.
'98a.
On l'~riPatus novce-britannice, sp. n. Ann. Mag. Nat. Hist. (7)' vol. 1, pp. 286-887.
, '98b. The Development of Peripatus WCE-britannice. Cam- bridge.
'98~. The Anatomy and Development of Peripatus navce-hit- tannia. 52 pp., pis. 4. Willey, Zool., Results. Cam- bridge.
Pnchr 2850.56 (142 1). hup Ytpsycht rinclub nrgt28128-050 html



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Psyche [April
Lactica dilatipes sp. nov.
Small, oblong, light straw- yellow, antennae, except the base, most of the tibse and tarsi and a common. triangular spot on the base of the elytra, dark piceous, hind tibia of 8 abruptly dilated, inside, near the tip (like some species of Colaspis). 5 8 2 9, Salinas ~&i R. (Stuart), length 35-4 mm. Head with a broad, smooth front, with a few fine punctures, antennas relatively stout, reaching the middle of the elytra, second joint nearly equal to the third, thorax with nearly straight sides very finely punctulate, s-nlci well marked, especially the lateral; .
elytra, smooth, shining, very minutely punchilate; basal depression slight, the dark spot does not cover the "scutel, but touches the base . in either side, funning round under the shoulder, and a straight line across the middle; distinguished from seltata by the light legs and dilated '8 tibia; the punctuation of the $ is stronger than the 8.
Lactica semmigra Jac. P. Z: S. p. 176, is a preoccupied name and should be changed to Rosenbergi. he 8 hind tibia is di- tinctly curved and has a large spur-like process on the inside middle, like calcarata 111. In thqracica Jac. what I take to be the. 8 has a well marked dilation of the hind tibia close to the tip. The general shape of the body and the absence or otherwise of the ocular sulcus may be hereafter an aid in the future arrange- ment or division of the species of this perplexing group. OX PARAPERIPAT08 LORENTZI HORST AND OTHER SPECIES OF THE GENUS FROM NEW GUINEA
AND CERAM.1
Mr. Frederick Muir forwarded to me some time ago three speci- mens of Peripatus collected by Mr. A. F. Pratt in the Arfak Mountains, Dutch New Guinea.
1 Contribution from the. Entomological Laboratory of the Bussey Institu- .
tion, Harvard University, No. 182.




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19211 bow ditch-Xo tes on South American Lacticas Lactica spinifer sp. nov.
Stout, like calcarata 111. or thoracica Jac. entirely flavous with black eyes. (antennae except first joint missing), hind tibia with a stout spur-like process
(like calcarata) placed a trifle behind
the middle on the inside.
1 example Chancomayo Thamm (first Jac. coll.), length 4 mm. ~ead with a small median fovea, and a few punctures on the' front and vertex, thorax sparsely, finely punctulate, sides nearly straight, basal sulcus only moderately deep, the lateral deeply foveate; elytra smooth, polished, sparsely, finely punctulate and with a slight basal depression.
,
The tibia1 spur easily distinguishes this form. .In Ann. de Belg. 1893, Mr. Jacoby describes Lactica thoracica, a Bolivian form, as having the thorax "without any basal .sulcus, the lateral grooves just indicated.'' My specimen came from Ca- chabe; it is the best example of the absence of the basal sulcus. Another form with the same characteristic is /
Lactica plagiata sp. nov.
Ovate, convex, flavous, palpi, .antennae, legs and breast pitchy black, elytra with a large common blue-black spot from the base to below the middle, leaving a narrow strip of the margin flavous, the rear edge of the spot straight.
3 examples, 2 8 1 ? , Cachabe 1. c. (Rosenberg), length 4-5 mm. Head with well marked carina between the antennae, front smooth, except for a few punctures, antenna reaching below the middle of the elytra, second joint small, the first two joints some- what testaceous below, thorax with straight sides, smooth and shin- ing above, with a few minute punctures, the basal sulcus barely indicated (it might be called absent), the lateral grooves slightly indented; elytra smooth, convex, lightly punctulate, thickly on the yellow area at the tip. In what I consider the 9 the hind legs are much more strongly developed than in the 8 and the apex of the hind tibia is broadened and flattened on the inside. The thoracic structure is almost identical with that of thoracica Jac. Sellata Baly is a well known form, widely distributed in A species much resembling it kperficially I separate as Brazil.




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19211 Brues-On Paraperipatus ~orentzi Horst 51 Up to the present time, six species of Onycophora, all belonging to Paraperipatus have been found in New Guinea and the adjacent islands of Ceram and New Britain. In order of their discovery, they are the following :
P. novce-britannice Willey. 1898. Kew Britain. P. ceramensis Muir & Kershaw. 1909. Western Ceram. P. papuensis A. Sedgwick. 1910. Arfak Mts., Dutch North New Guiriea.
P. lorentzi Horst. 1910. Wichmann Mts., South Dutch New . Guinea.
- P. schultzei Heymous. 1912. German New Guinea. P. stresemanni Bouvier. 1914. Ceram.
With the exception of P. schultzei and its variety ferrugineus, these have been considered by Bouvier ('14) in an admirable paper which includes a key to species based on type material of novce- britannh, papuensis, ceramensis and stresemanni. P. lorentzi is included in his table from Horst's descriptions ('10 and 'II), but P. schultzei is not mentioned..
An examination of the specimens send by Muir shows that they are not P. papuensis, the type locality of which is the Arfak Moun- tains, from whence the examples before me also have come. They agree rather closely with P. lorentzi, originally discovered in the .
Wichrnann Mountains which lie to the south of the region occu- .
pied by the Arfak range. In spite of the several differences de- tailed below, I have been forced to conclude that two species, papaensis and lorentzi occur in the Arfak Mountains. Whether the two species occupy a different level, cannot be stated, as thete is - no indication of altitude on the label attached to the present speci- mens. However, papuensis occurs at in altitude of 3,500 feet, and lorentzi was originally found at 9,000 feet, so that it is very prob- able that the two do not overlap in their distribution. The types of P. lorentzi were females with 22 pairs of legs. All
.
three of the present species are also females, each .provided with 23 pairs of legs. In the types the transverse body folds are of two types, consisting of broad folds bearing mainly large papillae, alter- nating-with narrow folds, which are supplied mainly with accessory



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52 Psyche [April
papillae. There are five or six folds of each kind to a segment, and the narrow ones sometimes divide or may anastornose with the broad ones. In one of the present specimens such an alternation of broad and narrow folds can be seen, but in the others, and particularly in pieces of integument removed from the body and mounted in balsam under a cover-slip, it is seen that the secondary folds are frequently as broad as the primary ones and that they show much irregularity, division and anastomosis. The middle creeping pad of the legs in the types is twice as broad as the first or the third pad, and in the present examples it varies from one and one-half times the width of the first or third. The nephridial tubercle of the fourth and fifth pairs of legs divides the third creeping pad completely in the type and also in the present specimens, although in one individual these tubercles are abnormally small and do not divide the pad. .
Aside from these differences, there seem to be no distinguishing features, and it would seem that two distinct forms cannot be distinguished. It is interesting to note that the specimens at hand approach P. stresemanni Bouvier from Ceram in having 23 pairs of legs (23-24 in stresemahni and 22 in the typical lorentzi) and that the width of the second creeping pad on the leg varies from the . size given for lorentzi to that given for stresemanni. In the case of the Papuan species, as more are being made , known, it is evident that the same difficulties are to be encountered in differentiating species as have already become apparent. among the American Onycophora.
While it is apparent that P. lorentzi in the Arfak Mountain region approaches the Ceramese P. stresemanni in the characters mentioned, it seems improbable that the two species are not dis- tinct, although it is evident that they approach one another very closely.
As no photographs of the integument of P. lorentzi have been published, I have prepared some from the finely preserved speci- mens forwarded by Mr. Muir.




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52 Psyche [April
papillas. There are five or six folds of each kind to a segment, and the narrow ones sometimes divide or may anastornose with the broad ones. In one of the present specimens such an alternation of broad and narrow folds can be seen, but in the others, and particularly in pieces of integument removed from the body and mounted in balsam under a cover-slip, it is seen that the secondary folds are frequently as broad as the primary ones and that they show much irregularity, division and anastomosis. The middle creeping pad of the legs in the types is twice as broad as the first or the third pad, and in the present examples it varies from one and one-half times the width of the first or third. The nephridial tubercle of the fourth and fifth pairs of legs divides the third creeping pad completely in the type and also in the present specimens, although in one individual these tubercles are abnormally small and do not divide the pad. .
Aside from these differences, there seem to be no distinguishing features, and it would seem that two distinct forms cannot be distinguished. It is interesting to note that the specimens at hand approach P. stresemanni Bouvier from Ceram in having 23 pairs of legs (23-24 it. stresemaini and 22 in the typical Zorentzi) and that the width of the second creeping pad on the leg varies from the . size given for lorentzi to that given for stresemanni. In the case of the Papuan species, as more are being made , known, it is evident that the same difficulties are to be encountered in differentiating species as have already become apparent. among the American Onycophora.
While it is apparent that P. lorentzi in the Arfak Mountain region approaches the Ceramese P. stresemanni in the characters mentioned, it seems improbable that the two species are not dis- tinct, although it is evident that they approach one another very closely.
As no photographs of the integument of P. lorentzi have been published, I have prepared some from the finely preserved speci- mens forwarded by Mr. Muir.




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