Packard.] 
88 
[May 7, 
series. In another genus of this family, Artace punctistriga (fig. 
7) the planta bears nine and probably ten crochets. As shown in 
the figure the grypogene is very small, but distinctly bilobed, and 
suggests the shape of the plan tula of the normal thoracic foot of 
insects. In stage i of XJtetheisa bella , there are only four crochets, 
arranged in two pairs. The only other freshly hatched Lepidopter- 
ous larva, yet observed, with less than ten or twelve crochets in the 
planta is that of Ceratosia tricolor f in which there are eight. In 
the freshly hatched larva of Pterophorus periscelidactylus, there are 
two pairs of crochets. . In the first larval stage of Anisopteryx 
pometaria , there are only four crochets, a pair on each side. Be- 
tween them on both sides are six minute chitinous conical rudi- 
mentary crochets. 
In all the freshly hatched notodontian larvae which I have ex- 
amined, the number of hooks is as stated in the previous paper 
containing the life-history of certain species of this group. In the 
freshly hatched larva of Hypercliiria there are about twenty cro- 
chets, arranged in two sets of ten each, and this bilateral symmetry 
exists in all the Bomb} , ces which I have been able to examine. 
Homology of the “ flagellum ” of Cerura , etc ., with the planta of 
the other abdominal legs. — We have in our previous article in de- 
scribing the larvae of Heterocampa martliesia and of certain species 
of Cerura, called attention to the nature of the stemapocla or fila- 
mental legs of those caterpillars, and their generally undisputed 
homology with the anal legs of other Notodontians. Fig. 9 repre- 
sents the anal leg of Dasylophia anguina in its first larval stage. 
It is intermediate in form between the normal leg and the stema- 
pod. It has no crochets, but the planta, of which the “flagellum” 
of Cerura and H. marthesia seems to be the homologue, is retract- 
ed, and the retractor muscles, one of which is divided, are much 
as in the filamental legs of Cerura, etc. 
Note on the modifications in the tenant or gland ular hairs of the tho- 
racic feet. — As is well known the thoracic feet of caterpillars are 
five-jointed and end in a single claw, with apparently a rudimentary 
one at the base. Usually, besides the unguis or claw, there is a 
X I am indebted to Prof. J. B. Smith for the opportunity of examining a slide contain- 
ing the freshly hatched larvae of this moth, whose position is doubtful. It is difficult 
to examine larvae preserved in balsam in a microscopic slide, and I much prefer alco- 
holic specimens of freshly hatched larvae for microscopical examinations. In such 
cases the legs or other parts can be snipped off with fine dissecting scissors, and stained 
and examined in an animalcule box, or permanently mounted. 
