FUNGUS GNATS OF NORTH AMERICA. 93 



curved sete near the tip on the hinder wide; hypopygium (Fig. 

 72. See also PI. 7, fig. 17, Genera Insectorum, Fasc. 93). 

 Wing yellow tinged, without spots (Fig. 56, Plate I, Part I and 

 Fig. 245, Part III). Bred from several species of fleshy fungi. 

 Our commonest species. Alab., Id., Mass., Maine, N. C, N. J.. 

 N. Y., R. I., Tenn., Tex., Wis., Wyo. ' 



1/ 10. Mycctophila falcata n. sp. 



Male and female. Length 2.5 mm. Head, thorax and abdo- 

 men dark brown; scape, palpi, and hairs yellow, setae black- 

 superior forceps of the hypopygium elongate, curved (Fig. 73) 

 Coxae and legs yellow, tarsi brownish ; fore metatarsus about 

 1-16 shorter than the tibia; middle tibiae without setae on 

 flexor surface; hind tibire each with 2 ^ranges on extensor sur- 

 face ; hind metatarsus nearly .8 as long as all of remaining 

 joints. Wings yellowish hyaline, with a central spot (Fig. 197 \ 

 Halteres yellow. Ithaca, N. Y. ! 



A male specimen from.Mt. Constitution, Id., differs in hav- 

 ing humeri and scutellum yellowish ; a female from the same 

 locality dififers from the female from N. Y. only in being 

 slightly paler brown. 



II. Mycctophila unitica Loew. ^ 



Berlin. Ent. Zeitschr. XIII. 152. 1869. 



Female. Length 2.7 mm. Head reddish yellow, front sub- 

 cinereous, face, mouth parts, scape and base of flagellum 

 3'ellow ; flagellum brownish. Thorax opaque reddish yellow, 

 scutellum similarly colored. Abdomen fuscous, the sides of 

 the last 4 segments widely yellowish. Coxae and legs pale 

 yellow, tarsi slender, subfuscous, the fore tarsus tAvice as long 

 as the tibia, the hind metatarsus a little longer than the remain- 

 ing joints taken together; middle tibiae without setae on flexor 

 surface. Wing with a central spot. "Middle States." Hind tibias 

 each with 2 ranges of setae on extensor surface ; inner lateral 

 side ciliate to the middle. 



Male. Differs in having abdomen wholly brown ; hypopyg- 

 ium (Fig. 74V N. C, fW.B.); N. Y. ; Selkirk Mts., B. C. 

 (J.C.B.); Wash, f J.M.A.) ; Wis., and Wyo. (W.M.W.). 



A'ar. a. Differs in having disk of mesonotum brownish, a 

 slight d'fference in the form of the inferior forceps (Fig. 75L 



