O. A. .lOHANNSEN 395 



the four segments subequal in length; first segment with a small lateral 

 marginal seta, the second, third and fourth segments each with four pairs 

 of strong marginals, the third and fourth each also with four pairs of strong 

 discals arranged in a transverse row. The ventral sclerite of the first segment 

 only is visible, the remaining segments have the margins of the dorsal sclerites 

 in contact along the venter. Legs black, the trochanters, all tibiae, the tips 

 of all femora, reddish-yellow; the setae of the femora rather long and slender, 

 but few in number, arranged in longitudinal rows; fore femur with four 

 or five in the upper row, about ten in the row on the outer lateral e.xtensor 

 surface and seven in the lower row on the outer lateral flexor surface; hind 

 femur with about twelve in the upper outer lateral, and six in the lower outer 

 lateral row: fore tibiae each with two anterior (extensor) and one outer lateral 

 seta; middle tibia with one anterior (extensor) and one or two posterior ex- 

 tensor setae; hind tibia with three stronger setae on the apical haK and three 

 weaker setae on basal half of outer lateral flexor surface, two stout setae on 

 outer lateral extensor surface and one (characteristic of the Phaoninae) on the 

 median line of the extensor surface, at two-thirds of the distance from base 

 of the tibia. Besides these, all tibia |trovided with a numVjer of apical setae. 

 Claws rather short, pulvilU as long as the claws. Wings hyaline, yellow tinged, 

 base and veins strongly yellowish tinged, the m-cu crossvein faintly clouded 

 with brownish; two costal spines of moderate length; Ri ends before the r-m 

 crossvein; the m-cu crossvein straight, makes a right angle with M1+2 and 

 enters Cui at a point approxunately its own length from the wing margin; no 

 setae at the base of the radial veins. Squamae pale yellowish, unequal, mod- 

 erate, lower projects half its width beyond the upper; halteres reddish yellow. 

 Adirondack IMts., New York, July. 



Type in the Cornell University Collection. 



PHAONIA R. D. 

 Phaonia (Aricia) nigricans n. sp. 



Male. Length 10 mm. Head black, with pruinose reflections, angular, 

 width in profile at base of antennae and at the vibrissae about equal; the gray- 

 ish orbits contiguous on the front; genae in profile wider than the width, 

 buccae nearly as wide as the length of the third antennal joint; antennae 

 black, shorter than the face, second joint with three strong setae; arista long 

 plumose on basal half; face slightly concave, oral margin prominent; eyes 

 moderately hairy; palpi black. Thorax black, thinly gray-pruinose, mesono- 

 tum when viewed from above with four black vittae separated by three equally 

 broad grayish dividing stripes; scutellum black, tinged with yellowish-brown 

 toward the tip; anterior spiracle pale yellow; two pairs of inner dorso-centrals 

 in front of the scutellum; dorso-centrals 2+4, a stout bristle placed in front 

 and slightly laterad of the first anterior dorso-central; "pra" nearly as long as 

 the first supra-alar; sterno-pleurals l-|-2; scutellum with its full complement 

 of setae. Abdomen short ovate, black, tes.sellate with silvery-gray reflecting 

 spots; three or four irregularly spaced discals on the second, five or six on the 



TRANS. AM. ENT. SOC, XLII. 



