40 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



The female genitalia (figured from paratype) are easily recog- 

 nized by the heavy and corrugated chitinization surrounding the 

 genital opening and extending to the lower tips of the ovipositor 

 lobes. 



Three specimens are before us from the type locality. 



Type. — In National Collection. 



Type locality. — Florida. 



DIATRAENOPSIS IDALIS (Fernald) 



Figure 78 



Diatraea idalis Fernald, Cramb. N. Aiiier., Special Bull. Mass. Agr. Coll., 

 1896, p. 76.— Fernald, in Dyar List, Bull. 52. U. S. Nat. Mus., No. 4627, 

 1903. — Barnes and McDunnough, List Lepid. Bor. Amer., No. 5442, 

 1917.— Forbes, Mem. 68, Cornell Univ. Agr. Exp. Sta., 1923, p. 591. 



The female type has a conical tuberculate front, but otherwise falls 

 here. There are no ocelli. 



The female genitalia (figured from type) are so different from 

 those of the preceding species as to suggest a possible generic separa- 

 tion. There is no armature about the genital opening except the 

 smoothly chitinized tube of the ductus, and the latter has a couple of 

 small chitinized earlike flaps just at its juncture with the bursa. The 

 supporting rods of the 8th segment collar are also longer than in 

 diferentialis. 



Type. — In National Collection. 



Type locality. — New Jersey. 



The specimen referred as the male of this species by Fernald has 

 ocelli and may be placed in Chilo. We are proposing for it the name 

 Chilo femaldaUs. 



CHILD FERNALDALIS, new species 



Figure 31 



Diatraea idalis Fernald (male not female), Crainb. N. Ainer., Special Bull. 

 Mass. Agr. Coll., 1896, p. 76. 



Palpi long, porrect and down-curved. Antennae of male thick- 

 ened subserrate. Fore wing broad ; apex acute but not as pointed as 

 in idalis; uniform gray, irregularly dusted with blackish; a shaded 

 outer blackish line ; a faint dark mark at end of cell. Hind wing pale 

 gray. 



Expanse — 22 mm. 



Male genitalia with vinculum narrow, rounded. Harpe undivided ; 

 elongately triangular; costa with a smooth projection from base. 

 Uncus moderately broad, with apex bluntly rounded. Gnathos hook- 

 like, unspined. Anellus a plate with long, slender, lateral arms; 



