FUNGUS GNATS OF NORTH AMERICA. I39 



5". exigiia Say. '"Male. Length 1.2 mm. Black; thorax piceous at the 

 anterior angles ; poisers whitish at base ; feet whitish, dusky at tip. 

 Antennae fuscous, with dark gray hairs ; wings a little dusky, nervures 

 fuscous ; poisers elongated whitish, capitulum fuscous ; abdomen fus- 

 cous, opaque. Female. A little larger with the base of the feet and of 

 the poisers of a darker shade than those of the male. N. W. Terr." 



5'. exilis Say. "Male. Length .8 mm. Body dusky; antennae as 

 long as the body; stethidium yellowish white; thorax blackish; wings 

 dusky, apical forked nervure wide, the inferior portion hardly arquated; 

 halteres subclavate, about half as long as the abdomen, a little dusky; 

 abdomen a little hairy; feet pale. I ndiana ." 



S. temorata Say. "Length less than 2.5 mm. Wings hyaline, nervures 

 fuscous; poisers large; coxae and thighs pale or yellowish white; abdo- 

 men dirty yellowish obscure, lateral margin and posterior margins of 

 the segments blackish. Pa." 



S. traterna Say. "Female and male. Length 2.5 mm., male smaller. 

 Deep black, polished ; abdomen black-brown, opaque. Antennae dark 

 fuscous, with dense grayish hair; eyes in contact above the antennas; 

 thorax polished ; wings dusky, pale yellowish at base ; poisers with a 

 yellowish scapus and fuscous capitulum; feet dusky towards the tip. 

 N. W. Terr." 



S. fuliginosa Fitch. "Length 4.5 mm. Black with blackish brown 

 shanks and pale thighs, their haunches being commonly white. Its 

 wings are semi-transparent and smoky. The 16 cylindrical joints of its 

 antennae are more widely separated from each other by short intervening 

 pedicles than in S. )tiali. N. Y." "N. J." 



S. inconstans Fitch. "Length 2 mm. Black with the thorax smooth 

 and slightly shining, the thighs pale and whitish, and the wings pellucid 

 and glassy with an iridescent violet and red reflection. N. Y." 



The species identified with this in entomological literature and reported 

 from 111., Ky., Me., Neb.. X. J., X. Y., O., Ottawa, Pa. and Va., is in all 

 probability a composite ; = S. prolifica -j- S. coprophila Whether 

 either one is identical with S. inconstans is problematical 



S. lurida Walker. (Dipt. Saund. 418). "Div. A, b. Meigen. VI. 305. 

 Black. Abdomen piceous, tawny beneath. Legs tawny; tibiae and tarsi 

 brown. Wings brown; veins brown, tawny at the base. Halteres 

 tawny. Length 4 mm. U. S." 



S. mali Fitch. "Length Z-j mm to the tips of the wings. Head and 

 thorax black. Abdomen dusky, almost black, with a bright yellow band 

 at each of the sutures. Legs are black as are the antennae also, though 

 of less deep tint than the head and thorax. Poisers dusky. Wings 

 dull hyaline, tinged with smoky, and are a fourth longer than the 

 abdomen. In the female the antennae are half the length of the body. 

 X. Y." Larvae feed on apples following in the trail of the codling 

 moth. 



