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Psyche 6:571-572, 1891.

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December 1693.1 E's YCHL?. 571
area about thirty feet square that is shut in on three sides by masonry and solid
rock, the open side being toward the
north. In the coolest, darkest, dampest
nook at the foot of the dam were a few
more hydro$hiZus, not quite standing in
the water, but on very moist rock.
Nearly half of my
specimens have
become greasy since capture,-a very
rare trouble among the species of this
family. It suggests a modification of
their tissues from the normal type ofthe family to adapt them to the low ternper- ature under which they exist.
LIANCALUS SIMILE, n. sp.
8. Differs from the foregoing as follows : thorax much duller in color; hypopygium
destitute of filaments, with only minute lamellae ; fore metatarsus hardly one-fourth the length of the following joint, which is a little enlarged, with a slight fringe on the sides and a dense short brush below, the three following joints of equal length; wings on the apical two-fifths clouded with brown, theinfuscated area rather indefinite in extent; margin of the wing not excised, third vein ending before the apex.
Length, 6.1 mm.; of wing, 7 mm.
9. Differs from hydrophilus only in having the general color more pure green, without the extreme contrasts of blue and bronze; the wings of one specimen have more brown,
which takes the form of three well defined spots, but this is evidently variable.
One male, two females, Washington (state), University of Kansas collection.
The principal differences between this
species and guerulus are in the structure of the male fore tarsi.
TWO NEW FORMS OF DIASPINAE.
BY T. D. A. COCKERELL, LAS CRUCES, N. MEX. (I.) Aspidiotus uvae, Comstock var.
colo~atus, n. v.
2.
Scale about 14 mm. wide, broad oval,
flat, dull pale orange-brown, exuviae con- colorous, thinly covered, first skin rather pale.
9. Broad pyriform, pale orange. Three
pairs of lobes visible in immature specimens, but the middle pair only prominent. In the adult only two pairs of lobes are present, and of these the second pair might almost be described as rudimentary. The middle lobes are close together but not touching, pronii- nent, squared, notched on each side. The plates and incisions are practically as in uvae, so also are the anal and genital orifices - though the former in Cornstock's figure
(Rep. U. S. Dept. Agr. for 1880) appears to be too small. The terminal segments are
striate after the manner of ostreaeformis, etc., which I find is also the case with uvae. The grouped glands differ a little from uvae; as the median group, represented in uvae by twoorifices, is wanting in colorat~s; and the anterior and posterior lateral groups of coloratas run together, forming one long group of 11 to 15 orifices on each side -or may be separated by a short interval, in which case the cephalolateral group has
about 8, and the caudolateral about g orifices. Eggs bright lemon yellow.
8 scale elongate oval, with the exuviae
towards one end.
Hat.
Las Cruces, New Mexico, 3,800 ft.
alt., on Chilo-psis; scales crowded on the



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PSYCHE.
[December 1893.
under side of the leaves, producing a pustular appearance on the upper side.
History. This scale was discovered by
Hon. A. L. Christy in Las Cruces, and was examined by Prof. C. H. T. Townsend, who gave a short account of it as Aspidiotus n. sp. ?in Bull. 7, N. Mex. Exper. Station (1892) p. 11. Prof. Townsend sent it to Prof. Com- stock, who said it was unknown to him, and probably undescribed. On July 7, 1893, I found it in abundance close to the railway depot in Las Cruces, and after examining it, came to the conclusion that it was a new species. Although I had seen A. uvae in
Jamaica, it did not occur to me that it could be that species, partly because Professor Comstock did not recognize it, and partly because the food-plant and habit were differ- ent. However, I sent some to Professor
Riley, who remarked that the species came nearest to A. uvae; and that led me to com- pare it with specimens of uvae from Ithaca, N. Y., kindly sent by Mr. R. H. Pettit. The result is that I cannot by any means distin- guish it as a species from uvae, and even as a variety it is not well marked, and would hardly be separated but for the difference of locality and food-plant.
So far as observed, it is confined to Chilop- sis; and although grapes are extensively culti- vated in and about Las Cruces, no case is known of its attacking the vines.
This adds another to the instances of
Coccidae differing in habit though hardly or not at all in structure.
They are what might
be termed'physiological species, in contradis- tinction to the ordinary or anatomical ones. They suggest the idea that organisms present differential characters of a class which we are hardly beginning to understand.
(2.) Myiilaspis albus, Cockerell, var.
concolor, n. v.
"9- scale elongate, narrow-mytiliform,
grayish-white. Exuviae pale straw color. 2.
Elongate pyriform, black or brown-
black (dark brown by transmitted light), 14 mm. long. Skin conspicuously striate (albus also has the skin striate). Three pairs of lobes; median lobes large and prominent, rounded, notched without, rather widely
apart; and lobes bifid, low, the caudad por- tion largest; third lobes low, bifid, the two parts about equal. A pair of spine-like plates between the median lobes; and one such
plate beyond and and 3rd lobes respectively. A spine by the outer margin of each lobe. Margin beyond the third lobe coarsely
crenate. Margin in region of 2nd and 3rd lobes shows three or four sacs, elongated with bulbous ends - no doubt glandular.
The anal orifice is at a considerable distance from the caudal extremity. The ventral
glands are not in well-defined groups, but scattered. On each side of the anal orifice, slightly cephalad of it, is a group of about 8 orifices, not very close to each other; and between this and the third lobe is another scattered rather elongate group of about 8; and a few other orifices are scattered here and there, some single, others in little groups of 3 or 4.
m,
Theeggs (in caustic soda) are pe-
culiar for being of a dirty prussian-green color.
Larva. Elongate oval, eyes blue-black.
Last joint of antenna with two moderately long hairs. Tarsal knobbed hairs long and slender, with small knobs. Caudal filaments ordinary, but some broken off.
$ scale as usual in Mytilasfis.
Parasite. Many 9 scales show holes
where a parasite has escaped.
Hab.
Las Cruces, New Mexico ; in great
numbers on a chenopodiaceous plant, on
which are also found Orthesia n. sp., larvae of Lycaena exili's, and other interesting things. It mostly infests the stems, but the leaves show some scales, both on upper and under sides.
When I found this, I thought it must be
a new species, and it was surprising to find



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December 1893.1 Ps2%'HE. 573
that it could not be separated from M. &bus which I lately described from specimens on a malvaceous plant in Jamaica! There are differences, indeed, in the color of the exuviae and other small points, whereon a new
variety is founded - but after comparing concolor with the types of &us, I can see nothing to separate them specifically.
Thus we have :-
(a.) albus. Jamaica, on a malvaceous plant, alt. 50 feet above the sea, climate very humid, tropical.
(b.) albm v. concolor.
New Mexico, on a
chenopodiaceous plant, alt. 3,800 ft., climate very dry, not 'tropical. (One can scarcely say temperate, the summer heat being
greater than in Jamaica). Truly a singular distribution !
A NOTE ON* THE LARVA OF DATANA FLORIDANA GRAEF. BY HARRISON G. DYAR.
Having examined some specimens of the
larva of Datana floridana in the collection of the Museum of Comparative Zoology at
Cambridge, I am able to confirm the des- cription by Mr. Koebele (Bull. Brooklyn ent. soc. iv, 21) and to add that the lateral lines are slightly broader than the intervening black spaces, or as broad ; not confluent at the ex- tremities. The large, normal hairs are white; and arise singly from minute tubercles; the fine, short (secondary) hairs are black, very .inconspicuous without a le-ns, and not differ- ing from the corresponding structures in D. major and D. 'pahzii. The species is closely allied to D. $aZ?nii, and may prove, on further investigation, to be not specifically distinct. The following table may replace the one given by me (Ent. amer. vi, 132). I include the names of the three species whose larvae are unknown, in the order in which they will probably be found to belong.
MATURE LARVAE (Stage V).
Secondary hairs much shorter than primary ones. Hairs concolorous, pale.
Cervical shield black. . . . . . . . . . . . angzt sit. Cervical shield yellow.
Lateral lines separate at extremities. . . . . . . mi?zis/~a. [callfomica] .
Lateral lines confluent at extremities. . . . . . . drewselii. Hairs not concolorous.
Secondary hairs black ; head red.
Lateral stripes broken into spots. . . . . . . + . . major. Lateral stripes continuous.
Stripes narrower than the subdorsal black space; head pale red. $alrnii.
. . . Stripes broader than this space; head dark red. floridana.
[modesta].
Secondary hairs brown; head black or red. . ĺ´pers$icua [robusta].
Secondary hairs nearly as long as primary, concolorous. . . . . . . . . . .
Cervical shield black. integey~iwza.
Cervical shield yellow. . , . contracts.



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