246 THE CANADIAN ENTOMOLOGIST 



lateral margins of the tergites broadly yellowish. Sternites 

 reddish brown with an indistinct, narrow, brown median line; 

 lateral portions of the sternites infuscated, caudal margins of the 

 segments yellowish. Male hypopygium with the ninth tergite 

 rather prominent, the caudal margin with a broad and deep, 

 l^-shaped median notch; the basal portion of the tergite is tumid, 

 shiny chestnut but a broad margin around the notch is flattened, 

 the extreme edge narrowly blackened, chitinized, lateral lobes 

 truncated. Ninth pleurite complete, semicircular; outer pleural 

 appendage elongate-cylindrical, clothed with long, golden hairs; 

 inner pleural appendage very long and narrow, jutting into the 

 notch of the tergite, the outer edge clothed with long, pale hairs 

 that project backward to produce a hystriciform appearance; 

 apex of the appendage shiny chestnut-brown. From the ventral 

 caudal angle of the pleurite arises a shiny, chestnut-brown, .fat- 

 tened lobe that is directed caudad, its apex truncated. Ninth 

 sternite with a deep, V-shaped median notch that extends a little 

 more than half the distance to the margin of the eighth sternite. 

 Eighth sternite unarmed. 



Habitat. — Alaska. 



Holotype. — cf , Point Barrow, Alaska, July 14, 1898. 



This species is closely allied to Tipiila whitneyi Alex, from the 

 Pribilof Islands, Alaska, but is readily separated by the full- 

 winged males and the details of the hypopygium. 



NOTE ON OVI POSITION OF GASTEROPHILUS NASALIS L. 



BY CHARLES H. T. TOWNSEND, WASHINGTON, D.C. 



In the November, 1892, issue of Entomological News, pages 

 227-8, I published some notes on this subject, ip which I stated 

 that "I noticed the fly alight several times, always exactly in the re- 

 gion ventrad of the first cervical vertebrae." This observation relates 

 to a female which I captured May 15, 1892, while it was flying at 

 the throat of my horse, near Las Cruces, New Mexico. In the 

 sam.e notes I quoted Brauer's statement (Mon. Oestr., page 60) 

 that "according to Dr. Green G. nasalis deposits its white eggs in 

 the region of the throat of the horse." I further stated that I had 

 not found the eggs of the fly, though I searched the ventral region 

 of the throat after capturing the above female. 



Tilly 1918 



