140 INSI:;CUTOR INSClTIie M^NSTllUUS 
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 enorm.ous 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. Antennae with 
the first segment brownish yellow ; second segment bright yel- 
low ; flagellar segments with the basal enlargernxnt 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 prasscutum 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 fovese; 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 
