176 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



unique female, collected at Ft. Wrangel, Alaska. The male 

 answers the description of the female quite closely. 



Male: Length 4 mm. Antennae light yellow, arista yellow 

 at base, black beyond. Bristles of head black ; short sparse pile 

 of cheeks yellow. 



Thorax shining reddish yellow, humeral callosities and stripe 

 at base of wing pale yellow. Pleura and femora reddish yellow, 

 tibiae and tarsi paler.' Abdomen shining reddish yellow, without 

 black spots mentioned in description of female (also lacking in 

 female specimens examined). Wing markings paler than in 

 female, the mark at apex of cell 1st A not so large (see fig. 3). 



Allotype, male, No. 812, Mus. Calif. Acad. Sci. ; collected 

 by G. Dallas Hanna, August 10, 1920. 



PIOPHILID/E 

 29. Piophila oriens Mel. 



St. Paul Island, August 10. Two specimens were taken. The 

 species was described from New York and Massachusetts. 



EPHYDRID^E 

 30. Scatella quadrisetosa Beck 



St. Paul Island, June 21 and August 10. A large series of 

 specimens seem to answer the description of this form, which 

 was originally taken in Norway. 



31. Parydra metallica Cole, new species 



Male : Length 3 mm. Largely metallic bluish black or bluish 

 green. Antennae black, third joint very large, the arista black, 

 long pubescent to tip (fig. 4a). One large bristle on cheek near 

 front corner of eye, a smaller one back of it and under eye. 

 Lower half of face almost perpendicular, slanting from middle 

 back to antennal base, blackish, metallic; cheeks thinly blackish 

 brown pollinose; frons and vertex blackish with metallic olive 

 green reflections ; two large ocellar, two fronto-orbital, two verti- 

 cal bristles; face just below antennae with pollen yellowish in 

 certain lights; cheeks fairly broad (fig. 4a). 



Mesonotum metallic blackish green, with a faint suggestion 

 of purple vittae; bristles short, sparse and black; one pair of 

 long prescutellar bristles; about 12 small dorsocentral bristles, 

 about 12 acrostichal. Scutellum colored as thorax, dorsum flat, 

 with four marginal bristles, no conical warts. Pleura blackish 



