[445] DIPTERA 59 



the small crossvein, calypteres yellow, the lower ones projecting far 

 beyond the upper. 



Female: Differs from the male as follows: Eyes bare, front at nar- 

 rowest part almost twice as wide as either eye, no prrcocellar bristles, 

 third joint of antennas scarcely one and one-half times as long as the 

 second, arista short pubescent, the longest scarcely half the length of 

 greatest diameter of the arista, mesonotum opaque, bluish gray pru- 

 inose, marked with five dark brown vittas, sternopleurals i + i, abdo- 

 men broadly subelliptical, about one and one-third times as long as 

 wide, densely bluish gray pruinose, a pair of dark brown spots along 

 the hind margins of the second and third segments, middle tibiae each 

 bearing only two bristles, situated on the median third of the posterior 

 side, besides those at the tip, hind femora bearing a few rather short 

 hairs on the under side of its basal half and with five bristles on the 

 apical half ; wings hyaline. Length, 6 to 7 mm. Two males and one 

 female, collected July 9, 10, and 12. 



Habitat. Popof Island, Alaska. 



Type, Cat. no. 5245, U. S. National Museum. 



Limnophora nobilis Stein. 



Limnophora nobilis STEIN, Berliner Ent. Zeitsch., p. 207, 1898. 



Muir Inlet, June 12; Sitka, June 16; Popof Island, July 8 to 12; 

 Saldovia, Alaska, July 21 : Twenty-seven specimens. Originally de- 

 scribed from Alaska. 



Coenosia fuscopunctata Macquart. 



Coenosia fuscopunc tata MACQUART, Dipteres Exot., 4* Suppl., p. 270, 1849. 

 Ccenosia ovata STEIN, Berliner Ent. Zeitsch., p. 263, 1898. 



Popof Island, July n; Saldovia, Alaska, July 21: Two speci- 

 mens. Originally described from North America, without any indica- 

 tion of the exact locality ; it has been reported as occurring from New 

 Hampshire to Florida, and westward to Illinois. 



Coenosia lata Walker. 



Coenosia lata WALKER, Insecta Saund., Diptera, p. 368, 1856. 

 Ccenosia canescens STEIN, Berliner Ent. Zeitsch., p. 265, 1898. 



Lowe Inlet, British Columbia; Muir Inlet, June 12; Virgin Bay, 

 June 26 ; Kukak Bay, July 4 ; Popof Island, July 8 to 14 ; Saldovia, 

 Alaska, July 21 : Twenty specimens. Originally described from the 

 United States, without mention of any more definite locality. It has 

 been recorded from the same region as the preceding species, except 

 that its western limits are stated to be Kansas and South Dakota. 



