14 DIPTEEA. 



2. Tipula virgo, sp. n., 6 $ . 



Of the same group as the European T. oleracea ("Tipulse costatae," Schummel)— that is, with infuscated costal 

 cells and a limpid stripe behind them, along the basal and marginal cells to the apex ; colour grey, shape 

 much more slender than T. oleracea ; the same structure of the male forceps. 



Length : <J , 12 millim. ; $ , 13 millim. 



Hab. Mexico, Ciudad in Durango 8100 feet (Forrer). 



Head and rostrum light grey ; front with a brownish shade, in the middle of which 

 there is an indistinct brown line extending to the vertex ; palpi black. Antennae black, 

 bent backwards they would reach (in the male) about the middle of the second abdo- 

 minal segment; joints of the flagellum, beginning with the second, binodate, the 

 distal node being a little larger ; in the female they would hardly reach the end of the 

 thorax, and the nodes of the flagellum are less marked. The portion of the mesonotum 

 occupied by the usual stripes is pale brownish, the outline of the stripes being bordered 

 by darker brown ; the triangular intermediate stripe is bisected by a longitudinal brown 

 line. The portion of the mesonotum behind the suture, the scutellum, the metanotum, 

 and the pleurae are light greyish, almost hoary ; the membranous parts on both sides of 

 the roots of the wings are pale yellowish. Abdomen grey, paler along the lateral 

 margins ; male genitals with whitish foliaceous appendages ; base of the ovipositor dark 

 brown. Halteres with brown knobs. Legs brown, the femora reddish at the base. 

 Wings greyish-hyaline, brownish along the costa, as far as the stigma ; a limpid, whitish, 

 longitudinal stripe runs behind the brown costal margin, occupying nearly the whole 

 first and second basal cells except the distal end of the latter, as well as the sub- 

 marginal and first posterior cells ; it stops a little before reaching the apex. 



Three males, one female. 



N.B. — The brown lines on the mesonotum are sometimes very indistinct. 



o. 



Tipula 



Hab. Mexico, Northern Sonora (Morrison). 

 Group of T. lunata. Nine males, one female. 



4. Tipula ? 



Hab. Mexico, Northern Sonora (Morrison). 

 Group of T. lunata. Three males, one female. 



5. Tipula ? 



Hab. Mexico, Northern Sonora (Morrison). 



Group of T. bella, Loew, T. strepens, Loew. A single male. 



