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uh 38 KANSAS UNIVERSITY QUARTERLY. 
Vertex behind the yellow frontal crossband black, including the 
ocellar tubercle, which consists merely of a slightly elevated ring 
with the space between the ocelli somewhat concave, by no means 
convex; behind the ocellia slightly elevated tubercle; front sparsely 
provided with short, erect fuscous pile on the black band, some- 
what lighter on the yellow one; on the vertex the pilosity 1s fus- 
cous, yellowish at the occiput, more abundant and longer than that 
of the front. Occiput black, sparsely yellowish pilose above, at 
the middle with short, at the lower part with longer, sparse whitish 
yellow pile; superiorly very thinly yellowish pollinose, at the mid- 
dle of each side a large, distinct, white pollinose patch. Proboscis 
yellow. Antenne with the first joint yellowish brown beneath, a 
little darker above, its length about the same as the distance be- 
tween its extreme base and the anterior ocellus, its vertical width 
at apex fully one and a half times greater than that of base, above 
and beneath with blackish pubescence; the second joint very short, 
brown, at base darker, scarcely broader than the apex of the first, 
but at least five times shorter than that joint; third joint thickened, 
much elongated, fully two and a half times as long as the first one, 
narrowed in its middle, dark brown; the arista, situated near the 
base of the third joint, yellowish brown, its extreme base black, 
not reaching as far as the apex of that joint. Eyes bare; the inner 
orbits almost parallel and rather broadly separated. Thorax black, 
the broad lateral border of mesonotum to the scutellum, including 
humeri, mesopleure, upper part of sternopleure, upper part of 
hypopleure and most of metapleura, pale yellow; the yellow of 
the pleura forms a broad, semicircular band, interrupted only at 
the posterior side of sternopleure by a narrow black stripe con- 
necting the black of pteropleure with that of the sternum. Scu- 
tellum short, considerably convex, translucent, pale yellow, the 
extreme base and a dot on lower lateral angle brownish; the fur- 
row between mesonotum and scutellum deep. Abdomen short, a 
little wider than thorax, blackish brown; first segment rectangular, 
three times as short as its width, the latter about the same as the 
distance between the eyes on vertex (not wider), above yellow with 
a narrow brown, basal band, not quite reaching lateral margin; 
second segment short, as long as the third, its lateral outline seen 
from above slightly concave before the middle; first and base ot 
second segments form together a very short peduncle; third and 
fourth segments of equal width, the fourth hardly longer; fifth as 
long as the third, its distal end only half as wide as its base; the 
whole posterior margin of second, third, fourth and fifth dorsal 
