40 COQUILLETT [426] 



Kukak Bay, Alaska : A specimen of each sex, taken July 4. Orig- 

 inally described from English River, British America, and also re- 

 ported from South Dakota, Illinois, and Michigan. 



Porphyrops consobrinus Zetterstedt. 



Porphyrops consobrinus Zetterstedt, Dipt. Scand., 11, p. 471, 1843 ; viii, p. 

 3061, 1849. 



Yakutat, June 21; Kukak Bay, Alaska, July 4: A specimen of 

 each sex. This is a Eui'opean species, not heretofore reported as oc- 

 curring on this Continent. 



Sympycnus cuprinus Wheeler. 



Sympycnus cuprinus VsfiiEE.i.^Vi, Proc. Cal. Acad. Sciences, p. 50, 1899. 



Popof Island, July 10 to 12; Juneau, Alaska, July 25 and 26: 

 Seven specimens. Originally described from the vicinity of Monterey, 

 Calif. 



Hydrophorus glaber (Walker). 



Medeterus glaber Walker, List Dipt. Ins. Brit. Museum, iii, p. 655, 

 1849- 

 Metlakahtla, Alaska : A single specimen, collected June 4. Orig- 

 inally described from Albany River, British America. 



Family SYRPHID^. 

 Pipiza pisticoides Williston. 

 Pipiza pisticoides Williston, Synopsis N. Am. Syrphidse, p. 29, 1886. 



Fox Point, Alaska : Three specimens, collected July 28. Origi- 

 nally described from New Hampshire ; the U. S. National Museum 

 also contains specimens from Maine, New York, and Colorado. 



Chilosia occidentalis Williston. 



Chilosia occidentalis VJiL.iASTO'ii, Proc. Am. Phil. See, p. 305, 1882. Synop- 

 sis N. Am. Syrphidse, p. 41, 1886. 



Virgin Bay, June 25; Popof Island, Alaska, July 10 and 12: 

 Three specimens. Originally described from California; there is 

 also a specimen in the U. S. National Museum from Colorado. 



Chilosia borealis sp. nov. 



Male : Head black ; frontal triangle sulcate in middle, its hairs black, 

 those of the vertex mixed yellow and black ; face polished, the upper 

 margin and narrow border to the eyes gray pruinose, hairs along the eyes 

 short, sparse, whitish, median portion of face bare, central tubercle 

 prominent, a deep, concave space below it, the oral margin protruding, 



