Article beginning on page 115.
Psyche 6:115, 1891.

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PSYCHE.
legs of the caterpillar-like larva. He finds that during embryonic life each of the eleven abdomidal segments presents a pair of appen- dages. Those on the 1st and 7th-9th segments soon disappear, while those on the remaining segments persist as the prolegs of the larva. The pair ofappendages on the tenth segment, which are at the time of their origin in line (homostichous) with the appendages of the preceding segments, move pleurad, and thus become ectostichous. On the 11th seg- ment the appendages ("afterspitzchen") are close together (entostichous). It is this last pair of appendages which corresponds to the anal legs of Lepidoptera, since, in the true caterpillars, according to Prof. Graber, the anal legs do not belong, as Haase and other investigators aver, to the tenth, but to the eleventh abdominal segment. Prof. Graber's figures are certainly far from being conclu- sive on this point. The peculiar cerci of Lyda belong to the tenth segment and are not therefore homologous with the anal legs of Lepidopterous larvae.
It is also interesting to note that the forma- tion of the embryonic envelopes and the
manner in which the dorsal body-wall is com- pleted in the embryo Hylotoma strikingly resemble what is observed in Lepidoptera. This fact may prove to be of use as further evidence of a common ancestry for the Lepi- doptera and Hymenoptera. The embryology
ofHylotomacertainly appears to bear out the conclusion long since drawn from the adult structure of the Phytophaga, viz. : that this group is the most primitive among existing Hymenoptera. When we pass from a Tenth-
redinid to an Apid it appears that the embry- onic envelopes show a tendency to become aborted, just as they do in the Diptera, in passing from an old form like Chironomus to a recent form like Musca. The general valid- ity of this remark is in no wise impaired by the difference in the kinds'of abortive change undergone by the envelopes in the two orders. W. M. WHEELER.
BLOW-FLY.
Roffredi, M. Mfemoire sur la trompe du
cousin et sur celle du taon dans lequel on a donne une description nouvelle du plusieurs de leur parties. Avec des remarques sur leur usage, principalement pour la succion. Misc. Taurinensia, tom. iv. Turin, 1776-79.
Erichson, Wilhelm Ferdittand. Entomo-
graphien ; untersuchungen in dem gebiete der entomologie. r. Ueber zoologische
charactere der insecten, arachniden und crus- taceen. Berlin, 1840.
Brulld, [A]. Recherches sur les transfor- mations des appendices dans les articul6s. Ann. sc. nat., s&. iii, tom. i, zool., 1844. Blanchard, E. De la composition de la
bouche dans les insectes de l'ordre des dip- ' t6res. Compt.-rend., tom. xxxi, pp. 424-27, 1850, Paris.
Gerstfeldt, G.
Ueber die mundtheile der
saugenden i'nsecten. So, Dorpat, 1853.
Hunt, [GI. The proboscis of the blow-fly. Quart. journ. microsc. sc., vol. iv., 1856, London.
Mayer, [F. J .C.]. Ueber ein neu entdecktes organ bei den dipteren. Verhandl. naturh. ver. preuss. Rheinl. und Westfalen ; sitz- ungsberichte, bd. xvi, p. 106. Bonn, 1859. Suffolk, W. T. On the proboscis of the
blow-fly. Month, microsc. journ., vol. ix, 1869.
Lowne, B. T. On the proboscis of the
blow-fly.
Journ. Quekett micr. club, vol. i,
p. 126, 1868.
Lowne, B. T. Further remarks on the
proboscis of the blow-fly. Journ. Quekett micr. club, vol. i, p. 190, 1868.
Anthony. The suctional organs of the
blow-fly. Month. micros. journ., vol. ix, 1869.
Lowne, B. T. The anatomy and physi-
ology of the blow-fly. So, London, 1870. Graber, V. Ueber den schlundmechanis-
mus der arthropoden. Amtl. ber. d. 50 ver-



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samml. [deutsch.] naturforsch. und aerzte, Munchen, 1877.
Macloskie, [GI. The proboscis of the
house-fly. Amer. nat., vol. v., pp. 153-161, 1880.
Meinert, [F]. Sur la conformation de la
t&e et sur l'interpritation des organes buc- caux chex les insectes. Entom. tidskrift, vol. i, pp. 147, 150, 1880.
Meinert, [F]. Sur la construction des
organes buccaux chez les diptsres. Ibid., PP- 150-153-
Meinert, [F]. Fluernes munddele (Trophi
Dipterorum). Kjobenhavn, So, 1881, with 6 plates.
Dimmock, George. The anatomy of the
mouth parts and of the sucking apparatus of some Diptera. So, Boston, 1881, with 4
plates.
Becher, E.
Zur kenntniss der mundtheile
der dipteren,
Denkschr. Wien acad., math.
nat. kl., bd. xlv, 1882. Gives the literature of the subject very fully.
Kraepelin, K.
Zur anatomie und physio-
logie des i-iissels von Musca.
Zeitschr. wiss.
zool., bd. 39, 1883.
Lowne, B. T. On the head of the blow-
fly larva and its relation to that of the perfect insect. Journ. Quekett micr. club, ser. ii., vol. iii., p. 120, 1887.
[from Lowne's Anatomy, etc., of the blow- fly, $$. q-128. London, 1891.1
THE FOOT OF THE BLOW-FLY.
Power, Henry. Experimental philosophy,
in three books, containing new experiments, microscopical, mercurial, magnetical, 4'. London, 1644.
Hooke, [R]. Micrographia. London, 1667.
Leeuwenhoek, A. Anatomia rerum cum
animatarum turn inanimatarum ope micro-
scopiorum. Lugd. Bat., 1687.
' Leeuwenhoek, A. Select works, contain- ing his micro.scopical discoveries ; translated b.y Samuel Hoole, plates, 4'. London, 1798- 1807.
Dereham, The Rev. W. Physico-theology,
second edition, 1714. An ingenious teleo- logical disquisition, containing a note on the fly's foot, p. 374, and many curious notes on insects.
Inman, Thos. On the feet of insects.
Proc. Liverpool lit. phil. soc., no. vi, p. 220. Liverpool, 1849.
West, Tuffen. The foot of the fly; its
structure and action elucidated by compar- ison with the feet of other insects. Part I, with 3 plates. Trans. Linn, soc., vol. xxiii (1859), 1861.
Lowne, B. T.
On the so-called suckers of
Dytiscus, and the pulvilli of insects. Month- ly microsc. journ., vol. v., 1871.
[From Lowne's Anatomy, etc., of the blow- fly. $. 190. London. r89r.I
FULL-GROWN LARVA AND PUPA OF DEIDA-
MIA 1NSCRIPTA.- On July 13, 1890, I found on Amftelo~sis veitchii, in Brookline, Mass., a larva a trifle over two inches in length. The head was round, green, with a faint
white line on each side of the median suture. The body tapered from the fourth segment to the head, and was clear, bright green, without obliques.
Two pale yellow lines ex-
tended from the head over the dorsum of the first three segments. A brighter yellow- white line extended up each side of the caudal horn, and a little way down on the sides of the body-like the "last pair of obliques" of many sphingid larvae, only extending by no means so far down on the body. There was a thick wavy stigmata1 edge from 1st segment to the tip of anal flap. The body was not rough, but striated transversely. The caudal horn was green except on the sides where the yellowish lines came. Feet and prolegs green, spiracles unnoticeable.
On July fifteenth it stopped eating, and, on the seventeenth pupated. The pupa was I 3-16 inches (20 mm .) long, slender, brown mottled with greenish on the back. The abdominal segments were "honey-combed" with tiny




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