FUNGUS GNATS OF NORTH AMERICA. 315 



bb. Fore metatarsus shorter than the tibia and not i-io longer than 

 fore coxa. 

 c. Scutellum with 4 marginal setae. 



d. Cubitus forks proximad of the proximal end of the R-M 

 crossvein. 

 e. Superior and inferior forceps lanceolate. (Fig. 132) ; 

 a row of 4 to 6 setae over the fore coxa ; Mass. 



6. elata n. sp. 

 ee. One pair of forceps curved; (Fig. 133); lower margin 

 of trochanter with 2 setae; B. C. 7- bella n. sp. 



dd. Cubitus forks distad of proximal end of crossvein ; female. 



8. Allodia sp. 

 CO. Scutellum with 2 marginal setae. 



d. Cubitus forks at least slightly proximad of proximal end 

 of crossvein; or if directly under, then thorax largely 

 yellow. 

 e. Yellowish species. 



f. One pair of forceps clavate, much longer than the 



other pair (Fig. 134) ; N. Y. 9. beafa n. sp. 



ff. Both pairs of forceps more or less elongate (Fig. 135) ; 



Western species. 10. callida n. sp. 



ee. Dusky species ; fore metatarsus less than .8 as long as the 



tibia; female. Western species. 11. Allodia sp. 



dd. Cubitus forks under or distad of base of the crossvein; 



thorax mainly brown or fuscous. 12. delita n. sp. 



Allodia (Brachycampta) unicolor Lundb. from Greenland is omitted 



from the above table. Its thorax and abdomen are uniformly brown; 



fork of the cubitus is retracted and the fore metatarsus is shorter than 



the tibia. 



The species dcspccta, nubila, ohscuva, plcbeja, and sericca described 

 under Mycetophila may possibly belong to this genus. 



I. Allodia crassiconiis Stannius. 

 Observ. de Mycetophila. 22. 1831. 

 Male. Length 4 to 5 mm. Face and mouth parts yellowish ; 

 head brownish ; antennae as long as head and thorax united, 

 brown, basal joints yellow. Thorax brown to yellowish, 

 mesonotum with 3 broad blackish stripes which may be wholly 

 confluent ; hairs yellowish gray, appressed, setae at the sides and 

 the 6 upon the scutellum, black; pleura brown to yellowish. 

 The first abdominal segment fuscous with yellow hind margin, 

 the second, third and fourth yellow, each with a large quad- 

 rangular fuscous spot, or sometimes only with rather smaller 

 triangular spot, fifth, and sixth fuscous usually with yellow 

 posterior margins; hypopygium yellow. Coxse yellow, hairs 



