24 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.71 



DIATRAEA LINEOLATA (Walker) 



Figures 18, G3 



Leucania Uneolata Walkee, Cat. Lepid. Heter. Brit. Mus., pt. 9, 1856, p. 



100. 

 Cramhus impersonatellus Walker, Cat. Lepid. Heter. Brit. Mus., pt. 27, 



1863, p. 163. 

 Chilo culmicolellus Zexler, Mod. Chil. et Cramb., 1863, p. 7. 

 Chilo neuricellus Zelly^r,, Mod. Chil. et Cramb., 1863, p. 8. 

 Diatraea Uneolata ("Walker) Hampson, Proc. Zool. Soc. London, 1895, p. 



953. 



A medium sized to large species, variable in size. Fore wing 

 ground color light straw yellow; veins lined with brown, the inter- 

 lines absent or faint and ill-defined; discal dot variable in size and 

 distinctness, it and the terminal dots brown, concolorous with the 

 vein linings. Hind wing soiled white in the male, white in the 

 female. Front with a pointed tubercle. Hind tibia of male without 

 hair tuft. 



Expanse. — Male, 20-31 mm. ; female, 26-40 mm. 



Male genitalia at once distinguished by the broadened, double- 

 pointed apices of the long lateral arms of anellus, and the greatly 

 lengthened, pointed uncus and gnathos. Figured from specimen 

 from Purulha, Guatemala. 



Female genitalia with ductus greatly reduced (the neck of the 

 bursa coming almost to genital opening). The area behind and 

 caudad of genital opening smooth and rather strongly chitinized. 

 A dark, narrow, heavily chitinized, semicircular band in neck of 

 bursa. Bursa greatly elongated. Figured from specimen from 

 Avangarez, Costa Rica. 



Abdomen of male without hair tufts on second segment. 



Specimens are before us from Mexico, Costa Rica, Guatemala, 

 Panama, Colombia, the Guianas, Cuba, and the Bahamas. 

 • Types. — In British Museum {Uneolata, impersonatellus, neuri- 

 cellus f); "Mus. Berol." (culmicolellus). 



Type localities. — Venezuela {li/neolata, impersonatellus, neuri- 

 celhis) ; Colombia {cuhnicolellus) . 



Food plant. — Corn (larvae in the stalks and cobs). 



DIATRAEA SCHAUSELLA, new species 

 Figure 19 



A species similar to Uneolata, distinguished by the intensification 

 of the markings, and the black (not concolorous-brown) discal and 

 terminal dots. Fore wing yellowish straw color, the veins brown- 

 lined somewhat irregularly, being streaked on inner margin and 

 between veins 4 and 5. Hind wing soiled whitish, rather distinctly 



