1932 ] Phoridse Associated with Ants and Termites 135 
gent; lower row of bristles (antial and first lateral bristles) 
forming a row strongly curved downward medially, the me- 
dian ones twice as far from one another as from the lateral 
bristle ; middle row nearly straight and equidistant ; ocellar 
tubercle scarcely evident. Cheeks with a bristle at the lower 
angle of the eye and one below at the oral margin. An- 
tennae small, oval ; arista pubescent. Palpi moderate, each 
with five bristles at apex. Proboscis rod-like, as long as the 
head height beyond the basal bend. Eyes uniformly pubes- 
cent, postocular cilia rather short. Mesonotum shining ; scu- 
tellum twice as wide as long, with a pair of bristles at each 
side, the anterior one much smaller and almost hair like. 
Hairs of mesopleura reduced to a small group near the 
spiracle ; one large macrochseta on the propleura below the 
spiracle. Abdomen with five chitinized tergites, the second 
lengthened and without bristly hairs at the sides ; fifth more 
or less subtriangular or narrowly trapezoidal ; following 
segments membranous. Front tibia with a series of four 
bristles on the fore side, one at the basal fourth, one at 
middle, one at apical fourth and one just beyond. Middle 
tibia with a pair of bristles externally near base and a 
hair-seam extending to the middle, beyond which is an 
area of six imbricated transverse rows of minute bristles. 
Hind tibia with a complete dorsal hair-seam and a row of 
bristles just next to it inwardly. Costal vein extending 
slightly beyond the middle of the wing; costal divisions 
25 :7.5 :3, the first therefore nearly two and one half times 
longer than the other two together ; costal cilia very short 
and closely placed; first vein distinctly thickened beyond 
the middle and the third from near the middle ; second vein 
leaving the third at a very acute angle so that the cell 
formed is more than twice as long as wide on the. costa with 
the veins bounding its sides very thin ; one small bristle on 
the third vein at its base; fourth vein originating at the 
base of the second, gently curved at base and nearly straight 
beyond; seventh vein weak, but clearly defined. Halteres 
black. 
Type: Trinidad, B. W. I., November 25, 1928; one speci- 
men taken by Dr. J. G. Myers, hovering over a termitarium 
of Eutermes during a raid made by ants on the termites. 
