June, ’08] ENTOMOLOGICAL NEWS. 273 
. oo 
black stripe a fringe of black bristles extends along each side; scut- 
_ tellum regularly rounded behind, nearly as long as the width. 
Lp) 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- 
m runs to nuda Adams, but it appears as a form too ex- 
me to be regarded even as a variety on account of the fol- 
differences: no sharp definition of vertical triangle; 
Vittae of thorax black instead of brown, and three in number 
_ insteac of four; no additional line above base of wing unless 
_ extre obscure ; black eae on lacking above middle coxx, but 
two faint or obscure tions on pleura; scutellum lacking 
apical 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 f as long as second section. 
» 
oe 
SS 
oo 
oo 
_—— = 
. Collin county ; one female specimen collected 
in oat field, and one male in November, 1907. 
in the U. S. National Museum. 
| Generally yellow ; front dull, thorax with sericeous pubescence, abdo- 
Po Om black dot enclosing the ocelli, anda second dot be- 
; ocellar spot in the frontal triangle of the male; hair of 
front t and stubby, suggestive of minute bristles; arista black. 
3 Eyes black with slight pale pubescence. 
Dorsal vittze four in number, h black on the female, black on 
‘ middle pair but slightly parted and shorter than the 
co lateral ones, all failing to reach the posterior margin of the mesonotum; 
___an additional short narrow stripe above the base of the wing. Lateral 
of pleura strongly lined with black, and a short black dash runs 
each posterior coxa. Scutellum evenly rounded, bearing a few 
the apical pair stout. Similar black bristles fringe each 
mesonotum, and a pair arises near the posterior margin of 
standing at the distal end of a lateral stripe. 
black; abdominal segments infuscated at base, 
more suffused with a dark cast especially overspread- 
; anterior edges of second segment with a distinct small 
dot; venter immaculate; protruded tip of male genitalia and of 
female black; claws black. 
a Wings clear hyaline, second costal section twice the length of third 
___ Section, third and fourth longitudinal veins parallel. Length, 1.5 mm. 
ft veEHt 
vit 
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