176 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Bruner); same, G. R. Crotch; Vancouver Island, British Columbia, H. 

 Edwards (S. H. Scudder; U.S.N.M. Riley collection); Victoria, Van- 

 couver Island, British Columbia, Packard (same); Gold Stream, Van- 

 couver Island, British Columbia, July 17 (S. Henshaw); Su-amous, 

 British Columbia, July 25 (same) ; Northwest Boundary Survey, Doctor 

 Kennerly; Washington, Morrison (U. S. N. M. Riley collection; S. 

 Henshaw); Camp Umatilla, Washington, June 26, Henshaw (Museum 

 Comparative Zoology); Loon Lake, Stevens County, Washington, July 

 25, Henshaw (same); Brown's, Colville Valley, Washington, July 24, 

 Henshaw (same); Ellensburg, Kittitas County, Washington, July 14, 

 Henshaw (same); Easton, Kittitas County, Washington (U.S.N.M. 

 Riley collection); Spokane, Washington, July 21, 22, Henshaw 

 (Museum Comparative Zoology); Fort Wallawalla, Washington, Ben- 

 dire (U.S.N.M. Riley collection); Wallula, Wallawalla County, 

 Washington, September 1, Packard (same; S. H. Scudder); Morgan's 

 Ferry, Yakima River, Washington, July 1, Henshaw (Museum Com- 

 parative Zoology); La.Chapples, Yakima River, Washington, July 16, 

 Henshaw (same); Umatilla, Oregon, July 25, Henshaw (same); Ruby 

 Valley, Elko County, Nevada, R. Ridgway; Camp Halleck, Elko 

 County, Nevada, E. Palmer; Reno, Washoe County, Nevada ( U.S.N.M. 

 Riley collection); Truckee Valley, Nevada, R. Ridgway; Lake Tahoe, 

 Nevada, Packard (U.S.N.M. Riley collection); W T eeksville. Montana, 

 August 2, Henshaw (Museum Comparative Zoology). 



This is the species which has been classed, in the National Museum 

 as belonging to Walker's Caloptenus scriptus, and is therefore prob- 

 ably the species so named by Cockerell 1 as coining- from Colorado. It 

 is, however, not that species, a female specimen of the present species 

 having at my request been compared with the types by Mr. S. Henshaw 

 during a recent visit in London. As compared with this, lie finds the 

 true scriptus to be u much larger, heavier, and with shorter, heavier, 

 and more clumsy prosternal spine; thoracic carinae, especially the 

 median, sharper and more prominent; cups of upper valves of ovipositor 

 much deeper; lower valves much heavier." He also compared this 

 with the type of Walker's Caloptenus lilituratm and found it the same, 

 "agreeing as to front, eyes, thoracic carinae, prosternal spine, and 

 inesosternal lobes." 



This species varies somewhat, and runs very close indeed to M.atlani*; 

 more so in the northern examples from British Columbia and Wash- 

 ington than in those from Nevada; and were it not for the considera- 

 ble uniformity of Nevada specimens, in which the male cerci are always 

 relatively long and slender, and their marked distinction from Utah 

 specimens of M. atlanis, I should have hesitated to regard the species as 

 distinct from M. atlanis, especially in view of the great variation in the 

 latter species. As it is, I have been in much doubt where to place 

 females from British Columbia and Washington, where the two species 

 occur together. 



1 Trans. Am. Ent. Soc., XX ( 1S94), p. M 



