■ FUNGUS GNATS OF NORTH AMERICA. 29I 



Table of species. 

 a. Fore riietatarsus shorter than its tibia ; moderately slender species 

 with moderate or strong tibial spurs, 

 b. Subcostal crossvein (according to the figure) distad of the base 

 of the radial sector (St. Vincent Is.). Megalopalma. 



I. fraudiilenta. 



bb. Subcostal crossvein situated slightly distad of the middle of the 



basal cell ; subcosta ends about opposite the base of the radial 



sector. 2. ctirta n. sp. 



aa. Fore metatarsus over twice as long as its tibia ; very slender and 



delicate species with weak tibial spurs. 3. tanypus. 



I. ' Phthinia fraudulcnta Williston. 

 Trans. Ent. See. London. 263. 1896. 

 Male. Length 2^-3 mm. Antennae brown or blackish, the 

 basal joints somewhat yellowish; the joints of the flagellum 

 closely- set together, somewhat compressed ; front and face 

 blackish. Mesonotum reddish-brown, shining, with black hair; 

 pleura and coxse yellow. Abdomen reddish brown or blackish, 

 black at tip, venter yellow. Legs yellow, the tarsi brownish, 

 becoming black at the tip, spurs of tibia stout ; hind tibiae with 

 2 rows of spines; front metatarsi distinctly shorter than their 

 tibiae; hind tarsi longer than their tibiae. Wings tinged with 

 blackish, due to the easily perceptible pubescence. "St. Vincent 

 Isl." Williston. Judging from the figure this species belongs to 

 Enderlein's new' genus, Mcgalopelma. 



2. Phthinia curt a n. sp. 



i\'''ale and female. Length 3 mm. Head black, mouth parts 

 and basal joint of antenna yellow; the flagellum, two large spots 

 on each pleuron, 3 stripes on mesonotum, the metanotum, 

 abdomen, and tarsi pale brown, other parts yellow. The median 

 thoracic stripe is wedge shape, contiguous to anterior margin, 

 abbreviated posteriorly, the laterals are abbreviated anteriorly, 

 converge posteriorly, nearly meeting at the scutellum. Fore 

 metatarsus is about .8 as long as its tibia; tibial spurs of mod- 

 erate size, those of the hind legs about as long as the 4th tarsal 

 joint. Wings hyaline, grayish, veins brown, venation as figured 

 (Fig. 208). Hypopygium (Fig. 102). Halteres yellow. Ithaca. 

 N. Y. 



