10.4 R. W. Daivson 



Specimens examined: 1, from Mitchell, Scottsbluff 

 County, collected August 1, 1917 by E. J. Yates. This 

 form, or as here listed subspecies, is probably not uncommon 

 in western Nebraska, since it occurs rather abundantly all 

 through the western states. 



Diplotaxis carbonata Le Conte. 



1856. Diplotaxis carbonata Le Conte, Journ. Acad. Nat. Sci. Phila., 

 (2), iii, p. 270. 



No specimens of this species are at hand. However, 

 Mr. Fall records a specimen from Fort Robinson, Nebraska, 

 and says that carbonata occurs southward to Arizona, be- 

 ing rather common in Colorado and New Mexico. 



Diplotaxis frondicola Say. 



1825. Melolontha frondicola Say, Journ. Acad. Nat. Sci. Phila., 

 V, p. 198. 



Specimens examined: 76, from Lincoln, South Bend, 

 West Point and Cams, collected from May 11, to August 

 29. About a third of the specimens were collected at night 

 feeding on oak leaves. 



Diplotaxis basalis Fall. 



1909. Diplotaxis basalis Fall, Trans. Amer. Ent. Soc, xxxv, pp. 

 19, 73. 



Specimens examined : 85, from Dakota City, Hooper, 

 Ashland, Lincoln, Osceola and Fairmont, collected from 

 May 20 to July 25. Seventeen of the above listed speci- 

 mens were taken at night feeding on elm leaves, and two 

 on oak leaves. Doubtless a very extended series of this 

 and the preceding species could be collected by inspecting 

 foliage after dark with a lantern or a flash light. The 

 other species of the genus here listed could also probably 

 be collected with the greatest facility by this method. 



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