366 
[I)ecember 
at the end, forming an acutely triangular cell; costal margin acutely 
elevated ; nervures of the membrane numerous, forked, ramose. Con- 
nexivum broadly dilated. Penultimate ventral segment of the female 
Innately incised at base, and then split into two rounded lamellm ; 
genital segment triangularly emarginate, the pieces each side subacute 
at tip. Posterior femora thickened, cylindrical, hardly curved, bear¬ 
ing two rows of slender teeth beneath, anterior and middle femora 
denticulated at tip beneath, tibiae prismatic, the superior edges cari- 
nated, posterior tibiae granulated inside. 
C. vittiger n. sp. 
Bright ochre-yellow, polished. Head black, densely granulose, upon 
the tylus and reaching the base of the head is an ochre-yellow vitta, a 
shorter vitta interrupted by the eyes and a less distinct spot at base 
each side beneath indistinctly yellow, bucculae and basal joint of the 
rostrum also yellow. Antennae black, minutely granulated; eyes and 
ocelli rufous; rostrum, excepting the basal joint, black. Thorax yel¬ 
low, densely, roughly punctured, its collar and a small area behind it, 
upon the depressed space, omitting the middle line, blackish, a trans¬ 
verse vitta placed just before the posterior margin, but not reaching 
the humeri, also black; the transverse diameter is almost double the 
lono-itudinal, and the breadth at the collum does not exceed that of 
the head between the eyes, interior to each humerus is a slight promi¬ 
nence, a little beyond this the surface is roundedly impressed. Scu- 
tellum densely punctured with black, the immediate edge smooth, yel¬ 
low. Corium densely, finely punctured with black, excepting at the 
base exteriorly, which gives it a fuscous appearance, lateral elevated 
edge, posterior and interior margins and the elevated veins smooth, 
yellow; membrane black. Connexivum densely punctured with black, 
the exterior margin broadly yellow. Pectus yellow, coarsely punc¬ 
tured, the collar punctured with black. Yenter yellow, finely, densely 
punctured. Legs deep black, the anterior and middle femora with 
about three fine teeth at tip beneath, posterior femora much thicker, 
with two rows of longer spines beneath. 
Length 13 to 15 millim. Humeral breadth 5 to 5^ millim. 
Hah. Utah, Port Benton, Virginia, and Louisiana. 
Widely distinct from any of the other genera of this family in the 
shape and proportions of the head, &c. 
