DIPTERA 



405 



middle, the seventh about two and one-lialf times as long as its 

 greatest width; antennic of female reaching middle of metanotiim, 

 slightly tapering to the apex; of the usual three mesonotal vittae, the 

 outer ones are wholly wanting, the median one is gray, bordered with 

 a pair of black lines and with a third black line midway betweeri 

 them ; abdomen sparsely covered with very short yellowish hairs^ 

 yellow, marked with a median black vitta which is usually almost ob- 

 solete on base of abdomen and in the male is broadly expanded pos- 

 teriorly, male hypopygium rather small, yellow, ventral portion of the 

 eighth abdominal segment bearing a few short, yellowish hairs; 

 claspers transversely oval, the upper of the two processes near apex 

 of inner side of each is somewhat clavate, slightly longer than the 

 clasper, the other is about twice as long as this one and about four 

 times as broad, with two large grooves on the outer side toward its 

 apex strongly curving upward, the apex dark brown and terminating 

 in a flattened, rather narrow process in front of the base of which is a 

 large brown lobe ; dorsal piece of hypopygium destitute of processes ; 

 ovipositor yellow, noticeably longer than the second abdominal seg- 

 ment ; white spots of wings indistinct, discal cell only slightly 

 longer than broad. Length of male, 11 to 13 mm.; of female, 15 

 to 19 mm. Seventeen males and six females. 



Habitat. — Yakutat, June 21 ; Kukak Bay, Alaska Peninsula, July 

 4; Popof Island, July 10; Kadiak, Alaska, July 20. 



Type. — Cat. no. 5208, U. S. National Museum. 



The U. S. National Museum contains a female specimen of this 

 species collected at Fort Wrangell, Alaska, by Professor H. F. Wick- 

 ham. 



Tipula spernax Osten Sacken. 



Tipula speriiax Osten Sacken, Bulletin U. S. Geol. Geog. Survey Terr., iii^ 

 p. 210, 1877. 



Metlakahtla, Alaska : A male specimen, collected June 4. This 

 species was originally described from the mountains of California. 



Pachyrrhina vittula Loew. 



Pachyrrhina vittufa Loew, Berliner Ent. Zeitsch., p. 63, 1864. 



Muir Inlet, Alaska : Two male specimens, collected June 12. The 

 original habitat is the vicinity of Hudson Bay, British America. 



Proc. Wash. Acad. Sci. , November, 1900. 



