206 JOHN B. SMITH. 



little torn in addition ; but the other is in very fair condition. The 

 generic characters will identify the species which may be associated 

 with a small group of heavily built moths surrounding Thyreion 

 and Fala. 



LYTHRODES n. gen. 



Head closely applied to the thorax, yet not retracted ; front pro- 

 tuberant, the centre depressed, crateriform, this depression medially 

 divided by an acute vertical plate which extends beyond the crater 

 nearly half its diameter ; palpi very small, not extending beyond 

 the rim of the shield which forms the lower margin of the head ; 

 tongue moderate only and perhaps not functional ; eyes moderate in 

 size, hemispherical but not prominent; antennae simple; vestiture 

 thin, hairy, divergent. Thorax rather small, clothed with thin, 

 hairy vestiture, which forms no tufts; collar and patagia not re- 

 lieved ; legs rather stout, tibiae unarmed, except for the usual spurs, 

 the tarsi somewhat shortened, with unusually large terminal claws. 

 Abdomen smoothly scaled, untufted. The wings are rather large 

 in proportion to the body ; primaries trigonate, costal margin 

 slightly curved, outer margin even, regularly arquate, inner margin 

 sinuate; venation normal; secondaries with vein 5 only a little 

 weaker than the others, from the cross-vein near to its middle. 



The characteristic features of the genus are its peculiar frontal 

 structure, the short stout tarsi, otherwise unarmed legs and the sinu- 

 ate inner margin of the primaries. It may be associated with Cha- 

 maclea Grt. 



Lythrodes radial us n. sp. — Head and thorax white, with a faint yel- 

 lowish tinge ; abdomen white. Primaries creamy white, with bright almost car- 

 mine red streaks as follows: two short apical streaks; two occupying the inter- 

 spaces between veins 4-5 and 5-6, respectively, for their whole length ; one fill- 

 ing the interspace between veins 2 and 4; one extending from base beneath vein 

 2 to the outer margin ; two short basal streaks above and below vein 1. Fringes 

 whitish, cut with black opposite the interspaces. No median lines and no ordi- 

 nary spots. Secondaries white, with a faint yellowish tinge. Beneath whitish, 

 primaries with the disc a little darker, the markings of the upper side faintly 

 reproduced. Expands .80-.88 of an inch = 20-22 mm. 



Hub. — Yuma County, Arizona. 



This pretty little species is one of those collected by Mr. Hutson 

 in the Colorado desert, and is represented by two females in good 

 condition. It is altogether unlike any of our other described spe- 

 cies, and its only close allies are the species next to be described. 



