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 ; antennae 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. 



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

 and basal joints of antennas 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 srripes; 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. lo, 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, 



