J. R. MALLOCH 289 



typical dormlis and there is little (l()ul)t in my mind that it is but a variety of 

 that species. 



Female. — This sex is very similar to typical dorsalis females, but in the 

 latter the face is usually appreciably darker than the cheeks and the thorax is 

 more distinctly vittate. Length, 2.25 to 3.25 mm. 



Type.— d^; Berkeley Hills, California, March 22, 1908. [A. N. 

 S. No. 6205]. Paratypes.—2 cf , topotypical; 1 d", 6 9 , Yosemite 

 Valley, California, May 22, 1908; 3 cf , Milbrae, California, April 

 20, 1908; 1 cf , 1 9 , Moscow, Idaho, June 2, 1908. 



Schoenomyza dorsalis \ ar. partita vav. n. 



Male. — Differs from dorsalis in having the anterior half of frons entirely 

 silvery, the ocellar triangle being silvered at apex, so that when seen in front 

 the black wedge-like anterior extension, which separates the white portion of 

 frons into two areas in dorsalis, is absent. In other respects the specimens 

 agree very closely with typical dorsalis, but sometimes the face is but little 

 darker than the cheeks. 



Female. — Almost inseparable from typical dorsalis; the only difference 

 appears to be in the color of the frons which resembles that of the male, though 

 without silvery pruinescence. Length, 2.75 to 4 mm. 



Type.— d" ; Berkeley Hills, California, April 11, 1908, [A. N. S. 

 No. G206]. Paratypes.—l cT, 3 9, topotypical; 6 d^, 10 9, 

 Lagunitas Canon, California, March 29, 1908; 2 9, Berkeley 

 Hills, March 22, 1908; 3 9 , IMilbrae, California, March 20, 1908; 

 1 9 , Troy, Idaho, ^lay 31, 1908; 1 9 , Sarita, Texas, November 

 29, 1911, [Illinois]. 



Subfamih' Hydrotaeinae 

 There are representatives of two genera of this subfamily in 

 the collection. 



HYDROTAEA R.-D. 



Several species of this genus are very annoying to man and 

 cattle in this country and Europe. The first three species in this 

 collection occur in Europe as well as in North America. 



Hydrotaea occulta Aleigen 



1X26. Anlhomyia occulta Meigen, Syst. Besch., v, 133. 



One male, one female, Lagunitas Canon, Marin County, 

 California, I^Iarch 2^^, 1908. 



TRANS. AM. ENT. SOC, XLIV. 



