290 DIPTERA FROM SOUTHWESTERN UNITED STATES 



Hydrotaea armipes Fallen 



1823. Musca armipes Fallen, Dipt. Seuc, Muse, 75. 



This species, the larvae of which are found in manure, is the 

 most widely distributed of the genus, occurring throughout 

 North America and Europe. 



There are specimens in the collection with data as follows: one 

 male and two females, Alamogordo, New ^Mexico, April 14, 15, 

 25, 1902; one female, Cloudcroft, New Mexico, May 21, 1902; 

 one male, one female, Lagunitas Canon, iMarin County, Cali- 

 fornia, ]March 29, 1908; one female, ]Mesa Grande, Sonoma 

 County, California, July 12, 1908; two females, Troy, Idaho, 

 :\Iay 31, 1908; and one female, :\roscow, Idaho, June 2, 1908. 



Hydrotaea dentipes Fabricius 



1805. Musca (hutipes Fabricius, Syst. Antil., 303. 



Three females that appear to be undoubted dentipes Fabricus 

 with the following data: Cloudcroft, New ^Mexico, May 22, 24, 

 and 2G, 1902. 



In addition to the lack of bristles at base of ventral surfaces 

 of mid femora, the above specimens have the four to five bristles 

 at apex of antero-ventral surface of hind femur very much more 

 closel}' placed than in houghi Malloch, and the postero-dorsal 

 bristle is usually about one-third from apex of tibia, whereas in 

 houghi it is usually two fifths from apex. 



This is the first time I have seen what I consider true dentipes 

 from North America. 



Hydrotaea unispinosa Stein 



1S97. Hydrotaea nnispinosa Stein, Berl. Eut. Zeit., xlii, 165. 



One female which agrees in all particulars with the Colorado* 

 type in the Hough collection. 



Locality; Cloudcroft, New Mexico, :May 24, 1902. 



Hydrotaea sp.? 



One female closely resembling palaestrica Meigen. 

 Locality; Cloudcroft, New ]\Iexico, :May 27, 1902. 



Hydrotaea sp.? 



One female resembling luiispiyiosa Stein. 

 Locality; Troy, Idaho, ISIay 31, 1908. 



