140 INSI'CUTOR INSCITI^ MENSTRUUS 



maining segments dull brownish yellow without darker mark- 

 ings. Hypopygium with the ninth tergite rather small and re- 

 stricted, the narrow median area membranaceous ; the lateral 

 angles of the tergite produced into enormous finger-like lobes 

 which extend caudad, the apices bent inward and slightly vent- 

 rad, the tips truncated; eighth sternite with the caudal margin 

 produced into two elongate fleshy lobes, the median area with 

 a tuft of elongate reddish hairs. 



Holotype, male, Ormsby County, Nevada, July 6 (C. F. 

 Baker), No. 961. 



Type, Cat. No. 19987, U. S. Nat. Mus. 



Tipula bigeminata, new species. 



Male. — Length, 17 mm. ; wing, 19 mm. 



Palpi very dark brown. Frontal prolongation of the head 

 elongated, light brown, the impressed lateral line slightly 

 darker brown ; nasus very small, subobsolete. Antennse with 

 the first segment brownish yellow ; second segment bright yel- 

 low ; flagellar segments with the basal enlargement slight, dark 

 brown ; the remainder of the segments almost concolorous or 

 a little lighter. Head light gray with a delicate, subimpressed, 

 median line. 



Thoracic dorsum light gray, the praescutum with four dark 

 brown stripes, the lateral stripes a little broader than the very 

 narrow median stripes which are indistinct in front but clear- 

 cut posteriorly; an indistinct brown cloud on the sides of the 

 sclerite just back of the pseudosutural foveas; scutum clear 

 light gray with three brown marks on each lobe, a small 

 rounded spot on the anterior lateral portion of the lobe, and 

 two elongate marks, one of which adjoins the median area of 

 the sclerite; scutellum and postnotum brown with a sparse 

 light gray bloom. Pleura light gray. Halteres brown, the base 

 yellowish, the knob dark brown with a pale apex. Legs with 

 the coxae yellow, sparsely light gray pruinose ; trochanters dull 

 yellow; femora brownish yellow, the apex narrowly dark 

 brown ; tibiae dull yellow, the apex narrowly dark brown ; tarsi 

 dark brown. Wings light gray; a dark brown spot at the 



