36 PACKARD, NOTES ON THE 



I find after receiving a specimen of C. cressonana from 

 Mr. Grote that there will have to be no modification of the 

 generic characters given above, which were drawn from a 

 single species C. virginica Grote. In the first named species 

 the palpi are more curved up in front of the head than in the 

 latter, otherwise the differences are merely those of coloration. 



LARVA. The head is large, being nearly as wide as the pro- 

 thoracic ring. The vertical region is largely developed, and is 

 considerably narrower above than in front. . The epicranium is 

 small, being nearly equilaterally triangular, the clypeus is nar- 

 rower than the epicranium is long, and is raised, thickened, and 

 its front edge distinctly convex. The labrum is short, and divided 

 into two remote broad and short lobes. The mandibles are very 

 broad, short obtuse and thick. The labium and maxillae can 

 not very well be made out in my specimen, they are fleshy and 

 with no determinate form for comparison. 



The body is short and rather thick, the rings moderately 

 convex, and in consistence the skin is softer and more flexible 

 than usual. On each side of the body are six rows of tubercles 

 the tergal ones much the largest. There are on each ring of 

 the abdomen four tergal warts, arrayed in a broad trapezoid, 

 becoming linear in position on the thoracic rings, and on the 

 supraanal plate. These tubercles give rise to dense fascicles 

 of evenly cut hairs, which radiate out on every side so as nearly 

 to conceal the body, and give it when viewed from above a regu- 

 lar broad elliptical form, with very even sides. The eighth 

 ring is not enlarged, but the body from that ring tapers posteriorly 

 rather rapidly to the tip, though not by any- means so much so 

 as in Eudryas. The abdominal legs are short, thick and hairy 

 and the thoracic legs are still more bristly. 



The hairs on the upper part of the larvae are collected into a 

 mesial line of slight tufts. The head seen from above is con- 

 cealed by dense overarching hairs True and false (abdominal) 

 legs covered by lateral radiating hairs. The outline of the ter- 

 gum is hardly tufted, but rather scalloped, the scallop on the 

 third and twelfth rings of the body being the most prominent, 

 becoming short thick tufts. The hairs when magnified are seen 

 to have long thickset spinules. 



The specific characters are these. The body of the larva is 

 purplish livid covered with white and yellow hairs. Those 

 hairs on the first two thoracic, and last two abdominal 

 rings are all white. The head is a bright shiny red, black in 



