IOWA ACADEMY OP SCIENCES, 
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■except apex, varying from pale to deep fuscous; anterior wings subfuligi- 
nous, clearer at base. Form slender; bristles and spines short, inconspicu- 
ous; head, from dorsal view, subpentagonal; antennae seven-jointed, 
approximate; ocelli placed very far' forward toward front border of head; 
posterior angles of prothorax bisetose; spines on cubitus 15-16, arranged in 
a basal series of three or four followed by an intermediate group of nine, 
and this by two, more widely separated, at distal end of vein. 
Head, seen from above, subpentagonal, its greatest length equal to its 
greatest width; sides constricted behind eyes; front margin produced, and 
subangulated in middle, its width almost completely occupied by the 
antennae; eyes dark red-brown, of medium size, moderately granulated, 
pile scattered, long; posterior orbits depressed, with a row of short sparse 
hairs parallel to them; vertex scarcely elevated, gradually descending 
toward apex where it merges into the front; ocelli yellow, inner margins 
red; anterior ocellus on upper margin of front; lateral ocelli contiguous to 
upper orbits; ocellar bristles moderately long; small bristles between ante- 
rior ocellus and the eyes; occiput striate, provided with two weak bristles; 
front produced to base of antennse thence receding toward clypeus, fur- 
nished with a row of four weak bristles just beneath antennae and two 
similar bristles near clypeal margin. Antennse seven- jointed, approximate, 
base plainly visible from above; joint 1 shortest and thickest, one-half the 
length of the second; joints 2-4 increase in length in the order named; joint 
4 is nearly as long as joint 6, which is larger than any other joint; joint 5 
is slightly longer than the second and more slender than any of the preced- 
ing; joints 6 and 7 are closely united and together pyriform in shape; the 
latter is nearly one-half the length of the former; the first joint is sub- 
rotund; the second, somewhat barrel-shaped; the third subfusiform; the 
fourth and the sixth elongate- ovate; the fifth submoniliform; the seventh 
lanceolate, its base narrower than the apex of the sixth; bristles and sen- 
sorial spines of joint 4 placed nearer the middle than usual. 
Prothorax subquadrate, scarcely broader than head; sides very slightly 
constricted at anterior border; posterior angles narrowly truncate, pro- 
vided with two bristles; shorter bristles or hairs are scattered over a trian- 
gular area extending backward from the front margin, and a smaller area 
near the posterior angles; anterior angles provided with equally small, but 
heavier bristles; surface apparently smooth; mesoscutum broadly convex, 
nearly smooth, furnished with short inconspicuous bristles each side and 
two submedian bristles on disc. The scutellum, obtusely ridged, feebly 
sculptured, provided with two short, heavy, approximate bristles on ridge 
near basal margin. 
Abdomen slender; apex abruptly conical, resembling that of females of 
this family; sides distinctly sculptured; segments with a few bristles or 
coarse hairs laterally and on apical border of their ventral surface; caudal 
segments with longer and stronger radiating bristles arranged in two 
rings as in females. 
Legs slender; anterior femora scarcely expanded; posterior tibiae 
spiny on inner margin and at apex; their tarsal joints with apical spines. 
Anterior wings lanceolate, humeral angle moderately arched; cubitus 
-extending entire length of wing; radial vein obsolete at base and nearly 
obsolete at tip; costal spines, 22-24; cubital spines, 15-16, arranged in 
