\'0L. IX] MALLOCH— FLIES (DIPTERA) FROM CALIFORNIA 309 



In order to make clear the relationships of the new species 

 and its most closely related forms I append a synopsis of the 

 characters for the separation of the three species now before 

 me. As they are all similar in color and habitus it is unneces- 

 sary that they be described in full. 



1. Hind tibia with two antero-dorsal and three postero-dorsal bristles, 



j:o long slender recurved bristles near apex on antero-dorsal sur- 

 face; sternopleurals three in number (1 :2) . .Morma/u, new species 

 -. Hind tibia, in addition to the normal antero-dorsal and postero- 

 dorsal bristles, with about four long slender recurved bristles in 

 a diagonal series which begins at tip on anterior surface and runs 

 diagonally basad on to antero-dorsal surface 2 



2. Sternopleurals two in number (1:1); hind tibia with three very 



long slender bristles on antero-dorsal surface, the longest one dis- 

 tinctly proximad of middle and over half as long as tibia 



extreniitata, new species 



-. Sternopleurals three in number (1:2); hind tibia with two long 

 slender bristles on antero-dorsal surface, the longest one distad of 

 middle and less than half as long as i\h\dt.. . .re curva, new species 



12, Hylemyia normalis, new species 



Male. — Similar to H. recnrva in color. The hind tibia 

 differing as stated in synopsis and having the setulose surface 

 hairs shorter. 



Length, 5 mm. 



Type, Armstead. Mont., July 3, 1913. in collection of Mon- 

 tana Agricultural Experiment Station. Paratypes, three males, 

 Dillon, Mont., July 5, 1913; ten males, Lima, Mont., July 1, 

 1913; two males, Powderville, Mont., July 6, 1916; one male, 

 Bozeman, Mont., July 7, 1902; one male, Blitzen River, Ore., 

 July 6, 1906; one male, East Flathead, Mont., July 25, 1902, 

 and one male, IMusselshell, Mont., July 30, 1917. 



Two paratvpes from Lima, Mont., deposited in Calif. Acad. 

 Sci., No. 539. 



13. Hylemyia extremitata, new species 



Male. — Similar in color to H. rccurva. Differs from 

 rccurva as stated in synopsis and also in having the hairs on 

 anterior and antero-ventral surfaces of hind tibia much longer. 



Length, 5 mm. 



