THE MYCETOPHILID.i; OF NORTH AMERICA. 27I 



The first abdominal segment, the apices of the second, third, 

 fourth, fifth, and the whole of the remaining segments brown, 

 both dorsally and ventrally ; hypopygium (fig. 93) usually dusky, 

 setje black, forceps wath the two terminal teeth closely approxi- 

 mated. Coxae and legs yellow, tips of middle and hind coxse 

 and tarsi infuscated ; fore metatarsus .8 as long as its tibia, the 

 second fore tarsal joint | as long; pulvilli bushy, the hairs 

 clavate, claws simple. Wings hyaline, hairy, especially towards 

 the apex, veins brownish yellow ; a brown cloud covers the 

 petiole of the media, extending anteriorly reaching the subcosta 

 and posteriorly to Cu^, more or less interrupted in the second 

 medial cell; the basal section of the radial sector with a brown- 

 ish cloud ; a narrow preapical fascia extends from the tip of 

 Ra-h to beyond Cui, more conspicuous where intersected by a 

 vein, and a broad apical band, separated from preapical fascia 

 by a hyaline space as wide as this fascia; the subcosta ends 

 about opposite the coalesced part of the media ; Ri is strong but 

 not thickened at the apex ; R:+3 is very oblique and somewhat 

 longer than the petiole of the media, costa produced beyond the 

 tip of Ri-\-r. as far as the length of the M-Cu crossvein; anal 

 vein strong, produced to the margin. Halteres yellow. 



Female. Like the male, but the antennae, are only about one- 

 sixth longer than the body and the brown fasciae of the abdomen 

 are more extended. vSeveral specimens from Ithaca, New York. 



9. Macrocera clara Loew. v 

 1869. clara Loew, Berl. Ent. Zeitschr. XIII. 133. 

 Male and female. Length 34- to 4 mm. Slender, pale yellow- 

 ish, pile of the body pale. Antennae slender, in the male nearly 

 four times, in the female nearly three times as long as the body, 

 scape yellowish, flagellum fuscous. Thorax unmarked; abdo- 

 men with long pale pile ; each segment fuscous at the base. 

 Coxas and legs pale yellow, tarsi subfuscous toward the tip. 

 Wings hyaline, apically and posteriorly with long pile; apex of 

 Ri thickened and infuscated, joinerl with the radial sector by a 

 fuscous spot; a central fuscous spot interrupted anteriorly at 

 the radial sector, extends posteriorly subobsoletely along Cu= 

 to the margin ; apex of wing widely fuscous ; R2+3 short, pale, 



