274 ENTOMOLOGICAL NEWS. [June, '08 



Although running to O. ovalis Adams, these specimens differ 

 particularly by reason of the double length of the second com- 

 pared with the third costal sections of the wings, and by the 

 rather unusual appearance of an almost bristly front. 



Osoinis dissidens n. sp. 



Texas, Piano, Collin county ; June, 1907, one specimen 

 taken in an experiment cage in oat field. Type deposited in the 

 U. S. National Museum. 



Mostly shining black ; face below the frontal triangle, together with 

 the oral region and mouthparts, excepting the palpi, venter of abdomen 

 largely and dorsal base obscurely, knees of anterior and middle legs 

 slightly, tibiae of middle legs obscurely, all trochanters and the tarsi 

 except at tip, and halteres, yellowish. Frontal triangle extending across 

 the vertex, polished, reaching two-thirds of the distance to the an- 

 tennae, adjoining outer edges of front dull, front projecting over the 

 antennal insertions. Antennae dull opaque, third joint inwardly 

 sericeous, arista pale and faintly pubescent. Mesonotum with faint 

 pale pubescence, two fine sulci running forward from posterior margin, 

 scutellum with a pair of small terminal bristles. 



Wings clear, first and second costal sections equal in length, third 

 and fourth longitudinal veins parallel. Length scarcely more than 

 I mm. 



Runs to, and agrees in many respects with 0. obsciira ac- 

 cording to Mr. Coquillett's description, but the following dis- 

 tinguishing features are noted : greater part of the front yel- 

 low, tibiae of fore legs black instead of yellow, and the second 

 longitudinal vein joins the costa at more than half the distance 

 instead of midway between the apices of the first and rhird 

 longitudinal veins. 



Notes on the Psychodidae. 



BY LEONARD HASEMAN, University of Missouri. 



Since the completion of my monograph of the North Amer- 

 ican Psychoclidse, which appeared in the Transactions of the 

 American Entomological Society, Vol. XXXIII, I have been 

 carefully watching for any new species and life histories which 

 may turn up in this region. 



The extreme minuteness and inconspicuousness of the adults, 

 as well as the immature stages of these- flies, makes their dis- 

 covery in nature possible only by very close and persistent ob- 



