HESPERIA. 105 



with white, beneath much paler; costa white at the base, the spots 

 and points of the upper surface, but much larger and nearly con- 

 fluent. Antennce annulated with white. Thorax and abdomen 

 black above, below with the palpi and feet whitish. 



Utah. 



Felder. 



Fam. X. IIESPERIDAE. 



Larva cylindric, without spines; first ring small, head 

 prominent. Chrysalis cylindroid, elongate, hardly angular. 

 Perfect insect; head wide, transverse. Antenna3 often ter- 

 minated by a hook. Palpi short, last article very small. 



HESPERIA Linn. 



Head broad ; body robust. Labial palpi compressed in front 

 and incurved, with the sides convex and angulated. Antennae of 

 moderate length or elongate, straight, slender, with a subterminal 

 club, tip hooked. Primaries elongated triangular ; apical mar- 

 gin, more or less convex ; costal margin not reflexed, and the 

 disk in the males not marked with the oblique silky patch ; often 

 marked with pellucid spots. Secondaries subtriangular, with the 

 outer and anal angles rounded, or with the outer margin rounded 

 and sometimes dentated. Anal angle not produced into a promi- 

 nent lobe or short tail, and the disk beneath not marked with 

 silvery spots. 



1. H. cellus Boisd. Figured in Boisd. et Lee. pi. 73. 



Wings brown ; primaries with a broad yellow band across the 

 middle, the top of which is whitish ; a whitish spot at the upper 

 edge. Secondaries without spots on the disk. Fringe dull yel- 

 low or greenish, more distinct on the upper angle of the seconda- 

 ries. Under side paler ; markings of primaries the same, except 

 that lower edge is yellow. Secondaries with two bands of deep 

 brown. 



United States. — Expands two inches. 



Boisd. 



