12 



vein ; 7 sometimes arises from the stalk of 8 and 9 ; 11 from 

 beyond the middle of the cell. Hind wings, on the upper 

 side, with a row of long hairs on the hind margin of the 

 basal part of the cell ; veins 4 and 5 stalked, or united 

 throughout as one vein; 7 arises from 6, near its origin, 

 anastomosing with 8. 



These insects usually fly near sunset, but may be "flushed" 

 at any time during the day. The eggs are more or less 

 melon-shaped, ribbed and reticulated, or smooth. Larva 

 smooth, with few hairs, feeding in silk-lined galleries on the 

 grass family, or boring in stems. Pupa formed in a cocoon 

 within the galleries. 



SYNOPSIS OF THE GENEKA. 



( Outer margin of fore wing with one indentation, ... 2. 

 ( Outer margin of fore wing without indentations, ... 4. 

 , Hind wings with eight veins, Eugrotea. 



1 Hind wings with seven veins, . 3. 



f Fore wings more than three times as long as wide, 

 3. j Pseudoschoenobius, 



\- Fore wings less than three times as long as wide, . Prionapteryx. 



( Hind wings with seven veins, Uinta> 



C Hind wings with eight veins, ....... 5. 



J Fore wings with veins 7, 8 and 9 arising from one stalk, . 6. 

 1 Fore wings with vein 7 separate from the stalk of 8 and 9, . 7. 

 Antennae of the male pectinate, .... Thaumatopsis. 



D. -s 



Antennae of the male not pectinate, .... Crambus. 



Ocelli present, 8. 



Ocelli absent, Diatrcea. 



Fore wings three times as long as wide, . . Euchromius. 

 Fore wings not more than twice as long as wide, . . .9. 

 Fore wings white, with yellow markings, . . . Argyria. 

 Fore wings yellow or brown, . . . . . Chilo. 



\ 



UINTA HULST. 



Head medium ; front smooth and vertical ; eyes large and 

 hemispherical ; ocelli present ; antennae coarsely ciliated, and 

 toothed near the base ; labial palpi porrect, about three times 

 as long as the head, and coarsely scaled ; maxillary palpi about 

 as long as the head, quite bushy and triangular ; tongue rudi- 



