June, '08] ENTOMOLOGICAL NEWS. 273 



black stripes, a fringe of black bristles extends along each side; scut- 

 tellum regularly rounded behind, nearly as long as the width. 



First and second costal sections of the wings about equal in length; 

 the third and fourth together equal to one of the preceding; third and 

 fourth longitudinal veins parallel. Length, 1.75 mm. 



According to Dr. C. F. Adams' table of Oscinis, this speci- 

 men runs to mida Adams, but it appears as a form too ex- 

 treme to be regarded even as a variety on account of the fol- 

 lowing differences-: no sharp definition of vertical triangle; 

 vitte of thorax black instead of brown, and three in number 

 instead of four ; no additional line above base of wing unless 

 extremely obscure ; black spot lacking above middle coxae, but 

 two faint or obscure maculations on pleura ; scutellum lacking 

 apical pair of bristles, wholly bare, (may possibly be denuded, 

 however) ; fore margins instead of hind margins of abdominal 

 segments black ; tips of tarsi not black ; third section of costa 

 more than one-half as long as second section. 



Oscinis frontalis n. sp. 



Texas. Piano, Collin county ; one female specimen collected 

 in May at dusk in oat field, and one male in November, 1907. 

 Types deposited in the U. S. National Museum. 



Generally yellow ; front dull, thorax with sericeous pubescence, abdo- 

 men somewhat shining. Vertical triangle impressed, not quite reaching 

 to the antenna?, a black dot enclosing the ocelli, and a second dot be- 

 neath the ocellar spot in the frontal triangle of the male; hair of 

 front black and stubby, suggestive of minute bristles ; arista black. 

 Eyes black with slight pale pubescence. 



Dorsal vittse four in number, brownish black on the female, black on 

 the male, the middle pair but slightly parted and shorter than the 

 lateral ones, all failing to reach the posterior margin of the mesonotum ; 

 an additional short narrow stripe above the base of the wing. Lateral 

 suture of pleura strongly lined with black, and a short black dash runs 

 above each posterior coxa. Scutellum evenly rounded, bearing a few 

 black bristles, the apical pair stout. Similar black bristles fringe cadi 

 side of the mesonotum, and a pair arises near the posterior margin of 

 the dorsum, each bristle standing at the distal end of a lateral stripe. 



Metanotum shining black; abdominal segments infuscated at base. 

 the female being more suffused with a dark cast especially overspread- 

 ing the middle; anterior edges of second segment with a distinct small 

 black dot; venter immaculate; protruded tip of male genitalia and of 

 ovipositor of female black ; claws black. 



\\'ii'L's clear hyaline, second costal section twice the length of third 

 section, third and fourth longitudinal veins parallel. Length, 1.5 mm. 



