2O4 ENTOMOLOGICAL NEWS [May, 'll 



lesta lisetta Dyar. 

 lesta lisetta Dyar, Proc. Ent. Soc. Wash., XI, 29, 1909. 



This little species has the straw-colored wings and rows 

 of dots characteristic of the saccharalis group and also the 

 essential generic character of the union of vein n with 12. 

 But vein 10 is stalked with 8 and 9, and it is therefore neces- 

 sary to remove the species from Diatraea, as I have done. 



2. Lineolata group. 

 Diatraea lineolata Walker. 



Leucania lineolata Walker, Cat. Brit. Mus., IX, 100, 1856. 



Crambus impersonatellus Walker, Cat. Brit. Mus., XXVII, 163, 1863. 



Chilo nciiricelius Zeller, Mon. Chil. & Cramb., 8, 1863. 



The front has a distinct cone, across which runs a transverse ridge. 

 The fore wings are brownish or straw color, the veins brown with 

 brown lines between, not strongly contrasted; terminal dots absent or 

 minute ; discal dot often absent. 



There is a lightening of the ground color in the interspaces beyond 

 the cell, forming a faint pale ray outwardly from the discal dot, 

 which is never very distinct, but gives a characteristic appearance. 

 Hind wings soiled white in the male, with only a faint yellowish tinge 

 in the female. 



We have this species from Cuba, Trinidad, the Guianas, 

 Venezuela, Costa Rica, Mexico and southern Arizona, all 

 without any marked variation or tendency to local forms, ex- 

 cept that in the northern end of its range there is a tendency 

 to the loss of the frontal prominence. It is absent in a male 

 from Tehuacan before me, in a female from Cuernavaca and 

 in the single female from southern Arizona. This is not a 

 fixed local character, as other specimens from the same places, 

 indistinguishable in color, possess the frontal prominence. 



Diatraea culmicolella Zeller. 

 Chilo culmicolellus Zeller, Mon. Chil. & Cramb., 7, 1863. 



This was described from Colombia, and said to differ from 

 the preceding only in the obsolescence of the linings and dis- 

 cal dot. I have no specimens from Columbia, so let the name 

 stand, but I think it will be found to be the same as lineolata 

 Walker. 



