THE CANADIAN liNTOMOLOCIST 
Male. — Length 5 mm.; wing 5.2 mm. 
Rostrum and palpi brown. Antenna- with the first segment 
yellowish; remainder of the antenme dark brownish black, the 
flagellar segments short-cylindrical. Head broad, light yellow, 
palest on the front, richer on the vertex and occiput; a dark brown 
linear mark on the head. 
Mcsonotal prascutum light yellow, with three very broad, 
dark brown stripes that are confluent behind, the middle stripe 
ending before the transverse suture; tuberculate pits at nearly mid- 
length of the sclerite, rather linear, separated by a distance equal 
to nearly twice the short diameter of one; scutum light yellow, the 
lobes largely dark brown, this consisting of two confluent blotches; 
scLitellum light yellow, broadly dark brown medially, broadest 
anteriorly postnotum ^-ellowish basally, brown caudally. Pleura 
>ellow with two indistinct and somewhat interrupted lateral stripes, 
the dorsal one passing above the root of the hal teres, the ventral 
one including the sides of the sternum ; sternum yellow, except the 
sides and a narrow, dark brown, median line on the mesDsternum; 
dorso-pleural membranes dusky. Halt2res yellow. Legs with 
the coxaj and trochanters light yellow; remainder of the legs broken. 
Wings broad, the anal angle prominent; membrane light gray with 
sn^all, grayish brown spots as follows: At the origin of Rs, at r, 
tip of R\, fork of Rs, along the cord and outer end of cell tst M2; 
^efns dark brown. Venation: Sc2 far removed from the tip of 
Sa, lying just distad of the origin of i?5; r lying far from the tip 
cf Ri, this distance equal to about one-half of Rs; cell 1st Ah closed, 
narrowed at its inner end; basal deflection of Cm far before the 
fork of M; second anal slightly bisinuate. 
Abdominal tergites dull yellow, more brownish basally, a dark 
brown median blotch on each segment; sternites dull yellow, dark 
brown medially, the apical segments clearer yellow. Hypopygium 
with two broad, flattened lobes under the 9th tergite, these heavily 
chitinized on their dorsal edges; pleurites long, slender, somewhat 
digitiform; appendages black. 
Habitat. — Utah. 
Holotype, cf, mouth of Bear River, Utah; Sept. 16, 1914 (A. 
Wetmore) . 
Type in the collection of the United States Biological Survey. 
