1915.] NATURAL SCIENCES OF PHILADELPHIA. 485 
Holotype, 9 , Labrador (Packard) . 
Paratype, 9 , topotypic. 
The types are in the collection of the Museum of Comparative 
Zoology. The specimens bear the numl)er 395 and the manuscript 
name as given to the species, the label in Loew's writing. 
The character of the open cell 1st Mo is almost unknown in this 
genus, but since both specimens show the character in both wings 
it seems that the manuscript name suggested by Loew is a good one. 
The Tipula alta Doane (Annals of the Entomological Society of 
America, Y, 44, 1912) also shows this venational character. 
Tipula cayuga sp. n. 
Coloration gray or grayish brown, abdomen yellow; bases of the 
antennal flagellar segments dark brown, the segments constricted; 
male hypopygium with the ninth tergite having the caudal margin 
with a bifid median lobe. 
Male.— Length, 15-18 mm.; wing, 16.8-18.5 mm.; fore leg, femora, 
9.8 mm.; tibia?, 11.8 mm.; middle leg, femora, 11.2 mm.; tibiie, 
10.8 mm. 
Female. — Length, 24 mm.; wing, 21 mm. 
Frontal prolongation of the head rather long, above grayish to 
almost white, passing into yellowish beneath ; palpi brown. Antennae 
rather short, scape and first flagellar segment light yellow; remaining 
segments of the flagellum dark brownish black at the base, the 
remainder of each segment being yellowish; the apical segments 
are more uniformly brown; the flagellar segments are deeply incised, 
the two ends being noticeably enlarged. Head with the front whitish, 
the vertex light gray, behind the eyes more suffused with brown. 
Thoracic pronotum dull yellow. Mesonotal praescutum light 
gray or grayish brown with three distinct thoracic stripes, these 
stripes pale brownish yellow, distinctly and sharply margined with 
darker brown; scutum light gray, the anterior part of each lobe dark 
brown; scutellum and postnotum dull yellow, whitish pollinose. 
Pleura yellowish, thickly white pollinose. Halteres pale yellow at 
the base, brown at the tip. Legs with the coxse yellow, densely white 
pollinose; femora yellow, a little darkened at the tip; tibiae light 
brown soon passing into the dark brown of the remainder of the 
legs. Wings pale yellowish subhyaline to hyaline, the costal cell 
yellowish; a brown stigmal spot, more yellowish in front; a large 
vitreous spot before and behind the stigma; veins dark brown. 
Venation as in Plate XVI, fig. 10. 
Abdomen yellow, the tergites two to eight with the caudal margin 
