FUNGUS GNATS OF NORTH AMERICA. 303 



tions of 3 vittae of which the median is geminate and most dis- 

 tinct. Abdomen slender, with a fuscous' spot on each of 

 the segments, that of the sixth nearly covering entire segment 

 except the venter; hypopygium yellowish. Legs yellowish; 

 coxje each with black spot at apex; tibise a little darker, tarsi 

 brown; fore metatarsus a fifth shorter than the tibia. Hal- 

 teres yellow. Wings with yellowish gray tint ; subcosta ends in 

 Ri beyond the middle of the basal cell ; cubitus forks somewhat 

 proximad of the fork of the media. "Quebec" (V.d.W.). 

 "N. J." 



2. Trichonta cincta n. sp. 

 Female. Length 3.25 mm. Head and antennae fuscous, the 

 face, palpi and scape yellow ; antennas about a third longer than 

 head and thorax. Thorax yellow ; dorsum with 3 wide brown 

 stripes ; scutellum, metanotum, and pleura largely brown ; hairs 

 pale. Abdomen black, shining, hind margin of each segment 

 yellow. Legs and coxae yellow, tarsi brown; a brown dash on 

 under side of each femur; fore metatarsus over .75 as long as 

 the tibia ; hind tarsus slightly longer than its tibia. Wings 

 hyaline, yellowish tinged, anterior veins brown ; media forks 

 slightly distad of the base of the radial sector; cubitus forks 

 proximad of the proximal end of the crossvein, anal vein faint. 

 Halteres yellow. Eastport, Me. (C.W.J. ). 



3. Trichonta triangularis n. sp. 



Male. Length 4 mm. Head brownish yellow ; face, palpi 

 and basal joints of antennae yellow, larger part of flagellum 

 dark brown with whitish pubescence ; antennae about 2-3 longer 

 than head and thorax. Thorax including pleura, scutellum, and 

 metanotum yellow, mesonotum with 3 brown stripes ; hairS' 

 yellow, setae brown. Abdomen yellow, each segment with a 

 large brown triangular spot, leaving the sides and narrow pos- 

 terior margin yellow. Hypopygium brownish (Fig. 10, pi. 7 

 Genera Insectorum, Fasc. 93). Forceps (Fig. iii). Coxae 

 and legs yellow, tibiae a little darker than femora, tarsi brown- 

 ish, fore metatarsus about .95 as long as the tibia. Wings 

 hyaline, yellow tinged. Venation as figured (Fig. 221). Hal- 

 teres yellow. (Aug.) Ithaca, N. Y. 



Var. a. Male. Dififers only in having the fore metatarsus 

 about 7-8 as long as the tibia. Ithaca, N. Y, 



