FUNGUS GNATS OF NORTH AMERICA. 9I 



4. Mycetophila sp. 



Female. Length 3 mm. Resembles the foregoing, but tht 

 yellow abdominal fasciae are wider, distinct also on the dorsum.. 

 The hind femora are broadly tipped with black, the fore 

 metatarsus is about 3-4 the length of the tibia, middle tibiae each 

 with 3 longer and one shorter setse on flexor surface; fore 

 tarsal joints 2, 3, and 4 are much broader than i. Wing with 2 

 distinct spots, the preapical spot fills apex of cell Ri but does 

 not reach vein JMl Eastport, Maine, July. 



5. Mycetophila sp. 



Female. Length 2.5. Resembles No. 4 but the thorax is 

 subopaque, abdomen is largely brown ; the fore tarsi are not 

 swollen, middle tibiae each with 3 setse on flexor surface, pre- 

 apical wing spot is more slender and crosses M2, and the fork 

 of the cubitus is narrower. Price Co., Wis. (W.M.W.) August, 



6. Mycetophila procera Loew. 



Male. Length 5 mm. Head dusky reddish yellow; antennae 

 blackish, scape and base of flagellum luteous. Thorax luteous, 

 with 3 dorsal stripes, the angles of the scutellum, pleural spots 

 and the metanotum blackish ; pile yellow, longer hairs and the 

 setae black. Abdomen blackish, the posterior margin of each 

 segment narrowly, and the lateral margins widely yellow. 

 Coxae and legs yellow, slender, tips of hind femora black, 

 flexor surface of each middle tibia with 4 or 5 setae, tarsi long 

 and slender, the mictatarsus and the following joints of hind 

 foot subequal. Besides the central spot there is a series of 

 fuscous spots from the tip of cell Ri across the wing, and the 

 apical third of the posterior margin is gray; veins strong, the 

 branches of the cubitus widely separated and slightly divergent, 

 "New York." 



There are three ranges of setae on the extensor surface of 

 the hind tibiae in the type specimen. 



7. Mycetophila fastosa. n. sp. 



Male. Length 4 mm. Head blackish, dusky yellow on the 

 sides ; scape, palpi, and base of flagellum yellowish, flagellum 

 blackish. Thorax subshining blackish, the wide humeral and 

 posterior lateral angles, a spot in front of the scutellum, the 

 scutellum, except the sides, yellow; hairs pale, setae black. 



