24 Psyche [February 
FOUR NEW NORTH AMERICAN CHLOROPIDE 
(DIPTERA). 
By J. R. Matziocs, 
Urbana, Illinois. 
Parectecephala dissimilis sp. nov. 
Male: Yellow, subshining. Frons parallel-sided, a little less than twice as 
wide as either eye; frontal triangle not occupying whole width of vertex, glossy, 
reaching in a narrow line to the anterior margin of frons, sides concave, a large 
black spot mid way between ocelli and anterior margin, ocellar region brown; 
surface hairs black, long and fine; post-vertical pair of bristles erect; head in profile 
elongate, frons projecting over one-third the length of eye, face receding much 
as in Ectecephala; face and cheeks whitish yellow, height of latter equal to over 
one-half the breadth of third antennal joint; antennze of good size, situated on 
almost apex of projecting frons, yellow, basal joints browned, third blackened 
above and at apex, third joint about one and one-half times as long as_ broad, 
upper surface at apex distinctly less rounded than lower; arista white, yellow at 
base, covered thickly with white hairs which give it the appearance of being thick- 
ened, length of arista equal to one and one-half tomes that of antenna; proboscis 
and palpi pale yellow, the former rather large and the apical portion folded back 
below the basal; eyes about one and one-half times as long as high, bare. Meso- 
notum with faint indications of three, almost confluent, reddish yellow stripes, 
the lateral margin of the outer stripe on either side brown, surface hairs dark, 
short; pleurz immaculate, highly glossy; scutellum flattened, the surface roughened 
slightly and with numerous short, black hairs, 2 apical long bristles and a number 
of short ones on margin. Anterior margin of abdominal segments brown; hypo- 
pygium glossy, prominent, with a projecting ventral process. Legs slender, only 
the last joint of tarsi, and claws black. Wings clear, veins brown; all veins dis- 
tinct, only the apex of fourth slightly less distinct than the others; cross veins 
separated by almost as far as length of last section of fifth vein; third vein slightly 
upward bent at apex; third costal section two-thirds as long as second; veins 
3 and 4 distinctly divergent; outer cross vein but little longer than inner, the cell 
enclosed by it, therefore very narrow. Halteres pale yellow. 
Length: 3.5 mm. 
Type: -Cat. No. 15968, U. S. N. M. 
Locality: Chester County, Pennsylvania, July 22, 1893. No collector's name 
on specimen. 
This species has much the habitus of some of the species in 
Diplotoxa and also those in Ectecephala. From Diplotoxa it may 
be separated by the less closely approximated cross veins, and 
the third vein being less distinctly upturned. From Ectecephala 
the flat frons readily separates it. 
