REHN AND HEBARD 179 



9-10.7; Sisson, California, 9.8-11.2; Los Angeles, California, 

 12; Reno, Nevada, 10.3-11.7; Milford, t'tah, 10.7-11.7 mm. 

 Morse, in his excellent series of measurements given with the 

 original description, shows the extremes of ovipositor length to 

 be 7.5 to 13 mm. in the present insect. 



The present geographic race is distributed over the region of 

 Pacific drainage in the United States, having been found from 

 Soda Springs, Idaho, and Milford, Utah, as far north as Tenino, 

 Washington, and Agassiz, British Columbia,-- and south to Alami- 

 tos Bay and Palm Springs, California. In the desert regions of 

 this area, the species is to be found often very numerous in green 

 vegetation in irrigated areas or where other constant sources of 

 water supply exist. 



Speciniens Examined: Previously recorded, 122. Here recorded, 201; 104 

 males, 92 females and 5 immature females. 



Soda Springs, Idaho, 7 cf , 7 9 , [Hebard Cln.]. 



Shoshone, Idaho, VIII, 8, 1910, (R. & H.; occasional in an irrigated area), 



4 c^, 4 9. 



Mountain Home, Idaho, VIII. 9, 1910, (R. & H.; scarce in an irrigated area), 

 1 6^,29. 



Nampa, Idaho, VIII, 9, 1910, (R. & H.; in a marshy meadow), 5 c?, 1 9 - 



Reno, Nevada, IX, 2, 1910, (R. & Hi; in gi-assy irrigated tract), 14 d^,Q 9 ■ 



Wabuska, Nevada, IX, 5, 1910, (H.; common in grasses about water tank), 

 1 cT, 3 9. 



Salt Lake VaUey, Utah, VIII, 1 to 4, 1877, (Scudder), 18 d", 11 9, 

 [M. C. Z.]. 



Provo, Utah, VIII, 23 and 24, 1877, (Scudder), 2 d^, 4 9 , [M. C. Z.]. 



Milford, Utah, IX, 5, 1909, (R. & H.; very common in grasses along river), 

 28 d", 39 9. 



Longmire's Springs, Mount Rainier, Washington, 2700 ft., VIII, 23, 1910, 

 III.; grasses about springs], 1 cf . 



PuUman, Washington, VIII, 19, 1909, (J. A. Hyslop), 1 cf , [U. S. N. M.]. 



Newaukum, Washington, VIII, 8, 1909, (H; in buh-ushes and l)racken), 

 1 juv. 9 . 



Mount Tabor, Oregon, VIII, 9, 1909, (R. ; high grasses in open) ,19. 



Council Crest, Oregon, VIII, 9, 1909, (H.; not common in fiekl of high dry 

 grass), 8 cf , 8 9,2 juv. 9 . 



Clackamas, Oregon, VIII, 9, 1909, (H.; in high grasses), 1 9- 



West Albany, Oregon, VIII, 10, 1909, (R. & H.), 1 cf , 1 9 . 



Divide, Oregon, VIII, 11, 1909, (R. & H.; occasional in dry meadow grasses) 



5 cf, 1 9. 



-- This record of F. Walker as fasciatus we have been unable to verifj-, but 

 there is httle doubt that the material will })e found to belong to the present race. 



TRANS. AM. ENT. SOC, XLI. 



