200 



PSYCHE. 



[February 1895. 



THE TIPULID GENERA BITTACOMORPHA AND PEDICIA. 



BY J. M. ALDRICH, MOSCOW, IDAHO. 



BiTTACOMORPHA. Westwood, Lond. 

 Edinb. pliilos. mag., vi, 2S1 (1S35). 



The only known species up to 1S90 

 was clavipes, described by Fabricius 

 in his " Species insectoium " in 17S1 

 under the generic name of Tipula. In 

 his " Systema Antliatorum " (1S05) he 

 referred it to the genus Ptychoptera, 

 where it remained until Westwood 

 erected for it the present genus in 1S35. 



In 1890 von Roder described the 



second species, sackenii, from a single 

 damaged specimen, captured in 

 Nevada. This species and one 

 described in the present article both 

 occur in the neighborhood of Puget 

 Sound. As von Roder's description 

 is not readily accessible to American 

 students, and does not include all the 

 important characters, I redescribe 

 the species. 



2. 



Table of Species. 



All the tibiae ringed with snow white near the base ; all the metatarsi white at 

 base. ............ 2. 



Tibiae not ringed, metatarsi white at tip, instead of base, sackenii v. Roder. 



Dorsum of thorax deep velvety black with a white middle line; second sub- 

 marginal cell one-third as long as the first posterior. . . clavipes Fabr. 



Dorsum of thorax shining black, no middle line of white; second submarginal 

 cell half as long as first posterior. .... occidentalis., n. f,p. 



Bittacoinorplia sackenii Von Roder, 

 Wiener entom. zeit. ix, 230. — $■ Front 

 infuscated, face yellow; both overlaid with 

 a thin white sericeous coating; proboscis 

 light yellow, palpi infuscated. Antennae 

 19-jointed, elongate, equalling the wing 

 in length, uniform black in color. Thorax 

 wholly pale yellow, except the dorsum 

 which is shining black, the humeri, supra- 

 alar area, and a spot before the scutellum, 

 yellow; between the coxae at the sides 

 there is a black spot in each interval, con- 

 siderably expanded in fully-colored speci- 

 mens; metanotum and knob of halteres 

 infuscated. Abdomen long, strongly clavate, 

 black, with short, scattered white pile; the 

 first segment pale at base, all the segments 



with a narrow pale distal band; second 

 segment i| times as long as the third, 

 fourth and fifth each about equal to the 

 third; claspers small, compact, black, with 

 a pair of black palpi-like organs covered 

 with black hairs. Femora pale at base, 

 the apical half or more black, but in lighter 

 specimens sometimes only an apical black 

 ring; tibiae of the same color, not so light 

 at base; metatarsi black, with white tip; 

 second and third joints of tarsi white, the 

 rest brown. Wings hyaline, along the apex 

 distinctly hairy, venation as in B. clavifes. 



Length, 11 mm; of wing, 74 mm. 



5. Antennae shorter, wings longer and 

 wider, the latter scarcely exceeding half 

 the length of the former. 



