DIPTERA 



447 



black, front one and one-half times as wide as either eye, two pairs of 

 orbital bristles, no pra^ocellar bristles, middle legs simple, middle 

 femora destitute of spines, the anterior-under and posterior-undersides 

 sparsely ciliate with short bristles, otherwise as in the male. Length, 

 4 to 5.5 mm. Fifteen males and eight females. 



Habitat. — Metlakahtla, June 4 ; Berg Bay, June 10; Sitka, June 

 16; Yakutat, June 21 ; Virgin Bay, June 26; Kukak Bay, July 4; 

 Popof Island, Alaska, July 10 to 12. 



Type. — Cat. no. 5246, U. S. National Museum. 



Homalomyia flavibasis Stein. 



Homalomyia flavibasis Stein, Berliner Ent. Zeitsch., p. 171, 1898. 



Sitka, June 16; Yakutat, June 21; Virgin Bay, June 26; Popof 

 Island, July 10 and 12; Juneau, Alaska, July 25 : Eleven specimens. 

 The type locality of this species is Illinois. 



Hydrophoria ambigua (Fallen). 



Musca ambigua Fallen, Diptera Sueciae, Muscidse, p. 56, 1820. 

 Aricia ambigua Zetterstedt, Dipt. Scand., xii, p. 4719, 1855. 



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

 is also a European species, recorded from Massachusetts and Illinois 

 about two years ago, by Mr. Stein. 



Anthomyia radicum (Linne). 



Musca radicinn Linne, Fauna Suecica, p. 1840, 1761. 



Anthomyia radicum Schiner, Fauna Austriaca, Diptera, i, p. 645, 1862. 



Yakutat, Alaska : A specimen of each sex, collected June 21. This 

 European species was first reported from this country about nineteen 

 years ago, by Mr. R. H. Meade, of Bradford, England. It has been 

 recorded from Canada to Pennsylvania, westward to Idaho. 



Anthomyia mystacea sp. no v. 



Black, the halteres yellow; front in profile slightly concave, frontal 

 vitta at narrowest part narrower than the lowest ocellus, face strongly 

 concave, oral margin projecting farther forward than the front, vibrissas 

 not longer than the adjacent bristles; extending obliquely downward 

 and backward from near each vibrissa are several irregular, dense rows 

 of long, upwardly curving bristly hairs, the rows almost equalling 

 length of face, lower part of front projecting more than length of 

 third antennal joint in front of the eyes, antennae nearly three-fourths 

 as long as the face, the third joint one and one-half times as long as 

 the second, proboscis nearly as long as height of head, the labellavery 

 small; mesonotum slightly polished, two median vittie in front of the 



