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 number 395 and the manuscript 

 name as given to the species, the label in Loew's writing. 



The character of the open cell 1st M2 is ahnost 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, V, 44, 1912) also shows this venational character. 

 Tipula cayuga sp. n. 



Coloration gray or grayish bro^vn, abdomen yellow; bases of the 

 antennal flagellar segments dark brown, the segments constricted; 

 male hypopygium Avith 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.; tibiae, 11.8 mm.; middle leg, femora, 11.2 mm.; tibiae, 

 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 bro^vn. Antennas 

 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 poUinose. 

 Pleura yellowish, thickly white pollinose. Halteres pale yellow at 

 the base, brown at the tip. Legs with the coxae 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 



