HESPERIOIDEA OF AMERICA 89 



Anatrytone Dyar, Jn. N. Y. Ent. Soc. xm, 140, 1905. Type 

 Hesperia delaware Edwards. 



Palpi upturned; second joint closely appressed, smoothly and 

 deeply scaled; third moderate, oblique. Antennae about one- 

 half as long as primaries ; club long, moderately thick ; apiculus 

 about as long as thickness of club, sometimes a little shorter. 

 Costa of primaries flattened or very slightly convex; outer mar- 

 gin moderately and almost evenly rounded; apex usually prom- 

 inent. Secondaries rather small, rounded, slightly lobed at anal 

 angle; a little more apically elongate in the females. Cell of 

 primaries normal; discocellulars oblique, weak; vein 5 curved, 

 nearer to 4 than to 6 ; 2 about intermediate between 3 and base 

 of wing. Stigma present or absent, composed of two similar, 

 slender, elliptic pieces placed end to end on opposite sides of 

 vein 1. Mid tibiae without spines. 



The long antennal club and spineless mid tibiae make this a 

 very distinct genus as used here, but no characters are available 

 for the separation of Atrytone and Euphyes of other writers 

 except the male stigma, which is present only in the species 

 formerly placed in Euphyes. The types of the two do not re- 

 semble each other, but in the species congeneric with them we 

 find an excellent connecting series, in which arpa and byssus 

 differ very slightly except in the stigma. 



Key to the species 



1. Under surface of secondaries immaculate or with a faint, pale, trans- 

 verse band on disk 2 



Under surface of secondaries with two pale rays dion 



Under surface with a few diffuse spots forming a curved transverse 

 row conspiciM 



2. Fringe of inner margin of secondaries white bimaoula 



Fringe of this margin not white 3 



3. Wings immaculate fuscous above and below or with a few small pale 



spots on primaries ($) vestris 



Wings with more pale markings 4 



4. Wings mostly dark brownish-gray below palatla 



Wings tinged with yellow or red below 5 



5. Stigma present arpa $ 



Stigma absent 6 



6. Upper surface of secondaries fuscous 7 



Secondaries with fulvous discal marks 8 



