666 WILLIAM T. M. FORBES 



3. ADELOCEPHALA Herrich-Schaeffer 

 (Sphingicampa Walsh, Othorene Boisduval) 



Imago practically indistinguishable from that of Anisota; average size a little 

 larger, discal dot of fore wing, when visible, double; inner margin of fore wing, 

 measured to tip of A, fully as long as outer margin. Hind wing shaded with 

 deep rose in our species. Rj free in the few specimens examined (fig. 421) but 

 from extreme end of cell. Caterpillar entirely unlike that of Anisota, with a 

 variable number of strongly flattened conical horns which are silvery on outer 

 side, the two on the mesothorax not much longer than the others. Pupa smoother 

 than that of Anisota. 



* Female antennte bipectinate, ivings blunter; pupa with hooked spines on 

 shaft of antennae (Sphingicampa). 



1. A, bicolor Harris. Dull ochre to fawn brown, dotted with blackish; usually 

 with two superposed silver-white discal dots in a darker shade; postmedial line 

 diffuse, running to costa about 3 mm. before the apex when distinct, sometimes 

 hardly traceable. Hind wing crimson, shading into brown on outer margin, with 

 a vague darker crimson postmedial band. Variety immaculata Jewett lacks the 

 dark dusting- wholly in the female, and almost completely in the male. Variety 

 suprema Neunuegen has the outer third of all wings and the body at least with 

 ash-gray ground; the name is often used in error for a variant with more black 

 dusting than usual. 60-75 mm., male usually smaller. (H 10: 5$, 6$-) 



Caterpillar granulose, usually green with a bicolored lateral stripe, reddish 

 anterior spines, and caudal horn, and a variable number of silver spines, usually 

 developed on alternate segments; on locust and Kentucky coffee tree. Three 

 broods, May; July; August; hibernating in pupa. 



Mississippi Valley, north to Ohio and Iowa, a stray specimen taken in New Jersey. 

 New York: (Grote, presumably from Buffalo). 



** Female antennce simple, wings more pointed, pupa ivith blunt tubercles 

 on shaft of antenna; ( Adelocephala ) . 



2. A. bisecta Lintner. Fore wing ochre yellow, brighter than in A. bicolor, and 

 never with a decided gray border; typically without any blackish dots, but well 

 sprinkled in variety nebulosa Neumregen. Inner line usually obscure, especially 

 in male, outer strong, straight, pinkish, running practically to apex; discal dots 

 small, white, or more often obsolete. Hind wing lighter ochre, heavily shaded 

 with crimson; darkest in fold, with a faint postmedial shade or none. 55-75 mm. 



Two broods late May and July. Caterpillar similar to that of 8. bicolor, 

 but on the average with fewer spines; sometimes with very few (a' few pairs on 

 the thorax, two on the sixth segment of the abdomen, and the caudal horn); the 

 spines of the thorax paler, the lower on the metathorax silvery; a brown and 

 yellow lateral stripe. Larva social when young. Eggs very flat, laid in a cluster, 

 browner than those of A. bicolor. Food Gleditschia. 



4. ANISOTA Hiibner 



. (Dryocampa Harris) 



Similar to Adelocephala, with head a little more prominent, antennae with about 

 sixteen pectinate segments, simple in female; fore wing typically markedly tri- 

 angular, with inner margin distinctly shorter than outer; but always more rounded 

 in female, and in both sexes of A. stigma practically like that of Adelocephala 

 bicolor, even less triangular than A. bisecta. R 2 lost; M^ in the specimens exam- 



