ART. 19. MOTHS OF THE GENUS DIATRAEA — DYAE A:tvD HEIFRICH 11 



Female genitalia with a shallow very slightly chitinized depres- 

 sion on each side of genital opening, forming a slight shield in front 

 of genital opening. Figured from type. 



No male is before us, only the single female type being known. 



The life history is unknown. •" 



Type. — In National Collection. 



Type locality. — Popocatepetl Park, Mexico (8-10,000 feet). ■ 



DIATRAEA SACCHARALIS (Fabricius) 



Figures 1, 2, 54 



Phalaena saccharalis Fabricius, Ent. Syst., vol. 3, pt. 2, 1799, p. 238. 



Chilo obtitei'atellus Zellee, Mon. Chil. et Cramb., 1863, p. 8. 



Cranibus leucanieUus Walker, Cat. Lepid. Heter. Brit. Mus., pt, 27, 1863, 



p. 161. 

 Cranibus UneoselliirS Walker, Cat. Lepid. Heter. Brit. Mus., pt. 27, 1863, 



p. 162. 

 Chilo comparellus Felder, Reise Novara, Lepid., 1874, pi. 137, fig. 5. 

 Chilo crambidoides Grote, Can. Ent., vol. 12, 1880, p. 15. 

 Diatraea saccharalis (Fabricius) Hampson, Proc. Zool. Soc. London, 1895, 



p. 953.— Fernaxd, in Dyar List, Bull. 52, U. S. Nat. Mus., No. 4624, 



1903. — Barnes and McDunnough, List Lepid. Bor. Amer., No. 5436, 



1917.— Forbes, Journ. New York Ent. Soc, vol. 28, 1920, p. 224. 

 Diatraea saccharalis ffrowdensis Dyar, Ent. News, vol. 22, 1911, p. 200. 

 Diatraea pedidocta Dyar, Ent. News, vol. 22, 1911, p. 201. 

 Diatraea saccharalis crambidoides (Grote) Holloway, Journ. Agr. Res., 



vol. 6, 1916, p. 621.— Holloway and Loftin, U. S. Dept. Agr., Bui} 



No. 746, 1919 (Bibliography). 



Size variable. Forewing yellowish brown, frequently more brown 

 than yellow, especially in the male; lines generally distinct in both 

 sexes, the outer dotted, the inner bent, parallel ; discal dot and termi- 

 nal dots blackish. Hind wing sordid brownish in the male, white 

 in the female. Front gently bulging, without tubercle. Hind tibia 

 of male with a slight whitish tuft of hairs. 



Expanse. — Male, 18-28 mm. ; female, 27-39 mm. 



Male genitalia with lateral lobes rising from above base of 

 tegumen; lobes broad and rounded (nearly as broad as long). Harpe 

 with a densely scobinate knoblike projection from base of costa. 

 Uncus Avith apex pointed. Gnathos strongly spined for half its 

 length from apex. Lateral arms of anellus with a few faint scat- 

 tered scobinations near their apices, otherwise simple; moderately 

 long. Penis with a single strong cornutus. Figured from reared 

 specimen from Baton Rouge, La. 



Female genitalia with a saucerlike chitinous depression on each 

 side of genital opening, roughened above and fusing beneath to form 

 a centrally and irregularly excavate shield in front of genital 

 opening. Ductus bursae broad and chitinized. Bursa moderately 



