F 



Scarabaeidae of Nebraska 115 



Phyllophaga anxia Le Conte. 



1850. Lachnosterna anxia Le Conte, Agassiz Lake Superior, iv, p. 

 226. 



Specimens examined : 3 ^ , Lincoln, and Monroe Can- 

 yon in Sioux Co., collected from May 31 to June 28. 



Phyllophaga draki Kirby. 



1837. Rhizotrogus drakii Kirby, Fauna Boreali-Americana, part 4, 

 p. 133. 



Specimens examined : 1 5 , 1 $ , from Sioux Co. in 

 June. 



Phyllophaga corrosa Le Conte. 



1856. Lachnosterna corrosa Le Conte, Journ. Acad. Nat. Sci. Phila., 

 (2), iii, p. 249. 



1920. Lachnosterna corrosa Hays and McColloch, Ann. Ent. Soc. 

 Amer., xiii, p. 77, pi. viii. 



Specimens examined : 765,7$, from Lincoln, West 

 Point, Norfolk, Grand Island and Halsey, collected from 

 May 18 to June 22. The only food plant record at hand 

 is that of four specimens collected at Lincoln, feeding on 

 Amorpha canescens. 



In the Lincoln specimens the genital armature of the 

 male is distinctly more angular in outline than in the other 

 specimens here listed. Whether this variation is discon- 

 tinuous or continuous is a point well worthy of future study 

 because of its bearing upon specific and subspecific rela- 

 tionships. 



Phyllophaga rugosa Melsheimer. 



1844. Ancylonycha rugosa Melsheimer, Proc. Acad. Nat. Sci. Phila., 

 ii, p. 140. 



Specimens examined: 4,335 s, 462 9, from South 

 Sioux City, Dakota City, Hooper, Fremont, Ashland, Ne- 

 braska City, Lincoln, Beatrice, West Point, Norfolk, 

 Osceola, Neligh, Exeter, Fairmont, Bradshaw, Hastings, 

 Grand Island, Halsey, Wood River and North Platte, col- 



221 



