Lepidoptera. 55 



54. Subcosta and radius in hind wing fused for a point about the middle of the cell, 



or connected by a crossvein; small or moderate-sized moths of dull, incon- 

 spicuous colors, the females of many species partly or entirely wingless. 

 (Hemerocampa (= Notolophus, Orgyia) [H. leucostigma, White-marked 

 tussock moth], Olene, Forth etria (=0cneria, Liparis) [P. dispar, Gypsy 

 moth], Euproctis [E. chrysorrhoea, Brown-tail moth]) (LIPARIDJE). 



LYMANTRIID^ 



Subcosta and radius fused from the base to the middle of the cell; rather small 

 moths, usually of dull colors, and with finely scaled wings, the fore pair 

 narrow and the hind pair broad. (Hypoprepia, Crambidia) (PI. 10, fig. 226) . 



LITHOSinXffi, part 



55. Legs absent, adults never leaving the cocoon; females. (See couplet 16). 



PSYCHIIXS;, part 

 Legs normally developed 56 



56. Cocoon seed-like, with a valve at one end (being formed of the larval case), 



the moth normally not leaving it; females (see couplet 16) .PSYCHID^E.part 

 Cocoon normally felted, of the larval hair, or rudimentary and underground. 5 7 



57. Abdomen closely scaled or spined, or with bristly, dark gray hair; a few females 



(see couplet 32) GEOMETKED.35, part 



Abdomen smoothly clothed with fine, light, woolly hair; moth not normally 

 leaving the cocoon, which is composed of the larval hair; a few females 

 (see couplet 54) LYMANTRIIDJJ, part 



58. Fore wing with three or four unbranched veins only 59 



Fore wing with some branched veins in addition to unbranched ones 60 



59. A large eyecap present. (Op6stega.) OPOSTEGID. 



No eyecap (see couplet 80) HELIOZELID^, part 



60. A well-developed eyecap, fringed with overlapping scales; labial palpi small; 



cell slender or absent 61 



Eyecap not developed, at most with the first antennal joint large, a little hol- 

 lowed on the inner side and fringed with a single row of bristles 62 



61. Discal cell very small, less than a tenth of the area of the wing, or wholly absent; 



wing membrane prickly (PI. 9, fig. 200) (Nepticula, Ectcedemia). 



NEPTICULID^E 



Discal cell larger; wing membrane not prickly. (Proleucoptera, Phyllocmstis, 

 Bucculatrix) LYONETHDJE 



62. Maxillary palpi twice as long as the eye, folded, conspicuous; living as larvae 



in plants of the genus Yucca. Yucca Moths. (Pronftba, Proddxus.) (PI. 



9, fig. 207.) PRODOXnXE 



Maxillary palpi shorter than the eye, or porrect 63 



63. Palpi short, at most barely reaching the middle of the front; tongue absent; 



covering of thorax and tibiae dense and hairy (see couplet 15). 



COSSIDJE, part 

 Of a different conformation 64 



64. Covering of thorax consisting of hairs, some of them broadened at tips, also 



similar on palpi and legs; palpi large and usually different in the two sexes, 



