1921] NATURAL SCIENCES OF PHILADELPHIA. 101 



and provided with a few long bristles. Head dark brown, narrowly- 

 paler adjoining the inner margin of the eyes. Mesonotum uni- 

 formly grayish brown, the postnotum more plumbeous. Pleura 

 testaceous. Halteres dark brown. Legs with the coxae yellowish 

 testaceous, trochanters obscure yellow; femora brown, paler basally; 

 tibiae and tarsi dark brown. Wings with a strong brownish tinge, 

 especially in the cells beyond the cord; cells C, Sc and the stigma 

 darker brown; veins dark brown: a pale area immediately before 

 the stigma; wings petiolate. Venation: Sc2 ending opposite two- 

 thirds Rs; Rs long, arcuated near its extreme origin, slightly more 

 than one-half longer than ^^2+3; cell 1st M^ elongate pentagonal; 

 petiole of cell Mi nearly twice m; vein Snd A close to the posterior 

 margin, cell 2nd A being very narrow. A.bdominal tergites dark 

 brown; sternites and hypopygium obscure brownish yellow. Male 

 hypopygium of simple structure, the ninth tergite ending in a median 

 conical lobe that is heavily blackened; inner pleural appendage 

 terminating in two acute stout spines, in addition to an apical, 

 very slender, curved spine. 



Habitat. — Peru. 



Holotype, cf , Yurimaguas, April 1, 1920 (H. S. Parish). 



Allotopotype, 9 , April 23, 1920. 



Paratopotype, 3 9 's, March 29-April 13, 1920. 



Tipula effeta, together with the species next described, T. plurnhei- 

 thorax, is not a typical member of the genus Tipula but will prob- 

 ably be found to represent a new genus or subgenus when more and 

 better preserved specimens are available. 



Tipula plumbeithorax sp. n. 



General coloration dark plumbeous, the pleura light gray pruinose: 

 wings faintly grayish, the stigma dark brown; 2nd Anal cell long 

 and narrow. 



Female. — Length 15 mm.; wing 12 mm. 



Frontal prolongation of the head comparatively short, dark brown 

 above, more yellowish laterally and beneath ; nasus short and blunt, 

 bearing several long, black bristles; palpi dark brown. Antennal 

 scape reddish brown, the flagellar segments brownish black, ver- 

 ticillate, one bristle on each segment being longer than the others. 

 Head plumbeous, light gray pruinose. Mesonotum uniformly dark 

 plumbeous, the scutellum and postnotum light gray pruinose. 

 Pleura with a light, blue-gray pruinosity. Halteres dark brown, 

 the base of the stem a little paler. Legs with the fore and middle 

 coxae gray, the posterior coxae reddish testaceous, very sparsely 

 pruinose; trochanters brownish yellow; femora brown, paler basally; 

 remainder of the legs brownish black. Wings with a grayish tinge; 

 stigma conspicuous, dark brown; cell Sc light brown; obliterative 

 areas before the stigma, crossing cell 1st M2 into the base of cell 

 M4; veins black, wings petiolate at base. Venation: Sc moder- 



