1915.] NATURAL SCIENCES OF PHILADELPHIA. 483 
Pronotuni l)lue-gray, indistinctly brownish medially and on the 
sides. Mesonotal prsBSCutum blue-gray with distinct rich brown 
stripes, the median one split by a narrow ground line; the lateral 
stripes broadly centered with the ground color; scutum gray, the 
lobes marked very indistinctly with brown; scutellum and post- 
notum gray infuscated with blackish, the former medially, the 
latter as a patch on either side. Pleura clear gray, the dorsopleural 
membranes yellowish brown. Halteres short, yello-\\ish brown, the 
knobs a little darkened. Legs with the coxse clear light gray; tro- 
chanters brownish black ; femora dull yellow, the apex broadly brown; 
tibiae brown, more yello^\ish on the l)asal third; tarsi dark brown. 
Wings subhyaline with a slight gray tinge; the stigma is oval, dark 
brown; a very faint bro^\^l tinge along vein Cu and its deflection; 
costal cell not brightened; a large vitreous spot before and beyond 
the stigma, ^>nation: Rs long, almost straight, as long as or 
shghtly longer than /?3, but shorter than Rn^,; cell M, short petiolate, 
this petiole a little shorter than cross-vein r-m; cross-vein m-cu 
punctiform. 
Abdominal tergites dull gray with three narrow brown Unes which 
are almost continuous; the lateral margins of the sclerites are broadly 
pale yellowish, this extending to and including segment seven; 
segments eight and nine uniformly dark. St emit es light gray,- the 
segments margined with yellowish, laterally very broad, caudally 
very narrow. Ovipositor (see Plate XXI, fig. 8.5) very small, the 
last segment narrowed, the upper valves small, flattened, transverse 
in position, the base l)roadened tapering to the acute apex, the 
valves divaricate; lower valves short, somewhat fleshy. 
The fly is provided with abundant long white hair, on the head, 
thorax, coxse and somewhat shorter and more appressed hairs on the 
abdominal tergites. 
Habitat. — Arctic America. 
Holotype, 9 , Hudsons Bay Territory (Kennicott). 
The type is in the collection of the Museum of Comparative 
Zoology. The insect is part of the Loew collection and the name 
adopted above is a manuscriiit name of Loew's appearing on the pin. 
This species is most closely allied to Tipula besselsi 0. S. The 
types of the two species have been compared in the collection of 
the Museum of Comparative Zoology and the differences are as 
follows : 
1. Color of the thorax dull light gray with four light brown stripes; 
median vitta of the head indistinct; dorsal abdominal vitta 
