ART. 17. NORTH AMERICAN PHOROCERA ALDRICH AND WEBBER. 85 



dian marginals, third with a marginal row and the fourth wholly 

 covered on the apical half ; abdominal hairs suberect in the male, less 

 so in the female. Legs black, mid tibiae bearing one bristle on the 

 outer front side near the middle ; hind tibiae ciliate. Wings hyaline, 

 apical cell closed, the third vein with two bristles at its base. 



Length 6 to 8 mm. 



Described from three males and three females reared from Halis- 

 dota maculata Harris, at Priest Lake, Idaho, August. 1901, by C. V. 

 Piper. 



r?//;c.— Male, Cat. No. 25728, U.S.N.M. 



PHOROCERA FESTINANS. new species. 



Front in male 0.285 of the head width; face and front j'ellowish 

 pollinose, the parafacial at its narrowest part being narrower than 

 the third antennal joint; facial ridges bristly two-thirds of the 

 way: bucca one-sixth the eye height; palpi pale yellow; antennae 

 black, as long as the face, the third joint seven times as long as 

 the second, arista thickened about half way, the penultimate joint 

 short. Thorax black, thickly covered with yellow pollen and marked 

 with five narrow but distinct black vittae; four dorsocentral 

 macrochaetae ; scutellum entirely yellow pollinose, the disk clothed 

 with many small erect hairs which are much longer near the apex, 

 and bearing three pairs of long marginal bristles, no apical ones 

 present. Sternopleura with three bristles. Abdomen black, thickly 

 yellowish pollinose, the first segment and narrow apical margins of 

 the second and third segments on their sides, black; the venter and 

 a narrow vitta on the dorsum of second and third segments are also 

 black. First segment with marginal, the remaining ones with 

 marginal and discal macrochaetae; fourth segment has two or 

 three rows on the apical half. Legs black, mid tibiae with one 

 long })ristle on the outer side near the middle: hind tibiae ciliate, 

 with one longer bristle. AVings hyaline, the apical cell open close to 

 wing-tip, third vein bearing two bristles at its base. Hypopygium 

 prominent, shining black. 



The female differs as follows: Front 0.314 of the head width; 

 face at its narrowest part about equal to the width of the third 

 antennal joint; facial ridges bristly one-half way; bucca one-fifth 

 the eye height; palpi deep yellow; third joint of the antennae 

 three times the length of the second, arista thickened on the basal 

 half; thorax black, gray pollinose tinged with yellow. Abdomen 

 somewhat thickened, the fourth segment wedge-shaped. 



Length 6 mm. 



Described from a male and two females collected in Hell Canyon, 

 in Manzano National Forest, New Mexico, by Dr. C. H. T. Town- 

 send, September 19, 1916. 



r?//)e.— Male, Cat. No. 25729, U.S.N.M. 



