Lepidoptera. 55 



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



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

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

 (Hemerocampa (= Notolopkvs, Orgi/ia) [H. leucosiigma. White-marked 

 tussock moth], Olene, Porthetria (=Ocneria, Liparis) [P. dispar, Gypsy 

 moth], Euproctis [£. chnjsorrhcea. Brown-tail moth]) (LIPARID/E). 



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 wing.s, the fore pair 



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



LITHOSim^, part 



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



PSYCHED^, 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) . PS YCHID.ffi, part 

 Cocoon normally felted, of the larval hair, or rudimentary and underground . 57 



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



(see couplet 32) GEOMETRID-S;, 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) LYMANTRIID.^, 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. (Opostega.) OPOSTEGID^ 



No eyecap (see couplet 80) " HELIOZELID.S, 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). 



NEPTICtJLID^ 



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



Bucculatrix) LYONETIIDJE 



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



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



9, fig. 207.) PRODOXID^ 



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 tibise dense and hairy (see couplet 15). 



COSSID-S, 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. 



