100 INSECUTOR INSCITl/E MENSTRUUS 



discal dot double, black, distinct ; outer line necir margin whitish, preceded 

 by submacular blackish band ; terminal dots small, black. Hind wing 

 fuscous shaded about costa and margin. Expanse, 10-14 mm. 



Cotypes, two males, three females, No. 1 6046, U. S. Nat. Mus. ; 

 Georgetown, British Guiana, bred from larvae feeding on Saissetia nig- 

 rum, a scale insect (G. E. Bodkin). 



A NOTE ON DIATHRAUSTA NERINALIS WALKER 



{Lepidoptera, Pyralida) 

 By HARRISON G. DYAR 



This species varies so much in appearance from different localities that 

 I have divided up the specimens before me into forms, or races. They 

 are the following. D. delicate Warren from French Guiana is unknown 

 to me. 



DIATHRAUSTA NERINALIS Walker 



Form reconditalis Walker. 



Hymenia reconditalis Walker, Cat. Brit. Mus., xix, 943, 1859. 

 Aediodes minualis Walker, Cat. Brit. Mus., xxxiv, 1297, 1865. 

 Diathrausta octomaculalis Fernald, Ent. Amer., iii, 127, 1887. 



Wings moderate ; lines occasionally with a little orange color replacing 

 the white in the 9 . c? with white streak from discal mark to margin of 

 hind wing. 



New Haven, Connecticut (A. E. Verrill) ; Watchung Mts., New Jer- 

 sey, June, 1 899 (W. D. Kearfott) ; New Brighton, Pennsylvania, Sep- 

 tember, 1902 (H. D. Merrick); Pittsburgh, Pennsylvania, July, 1905, 

 and August, 1 904 (H. Engel). 



Form harlequinalis, new. 



A larger, brighter form, the white of the lines conspicuously replaced 

 by orange in the 9 , partly so in the c? . Discal spots three on fore wing, 

 two on hind wing, white, the line on hind wing of male disconnected 

 from the upper discal dot. 



Chimney Gulch, Golden, Colorado, July, 1904 (E. J. Oslar); Fort 

 Collins, Colorado, August, 1 898 (C. P. Gillette) ; Boulder, Colorado, 

 August (T. D. A. Cockerell) ; Las Vegas Hot Springs, New Mexico 



