Scarabaeidae of Nebraska 101 



gion of Sioux and Dawes counties, collected at lights from 

 June 23 to July 23. It is probable that curvata does not 

 occur in Nebraska much to the south and east of the Pine 

 Ridge Region in the northwestern part of the state. 



Serica anthracina Le Conte. 



1856. Serica anthraciyia Le Conte, Journ. Acad. Nat. Sci. Phila., 

 (2) iii, p. 276. 



1856. Serica frontalis Le Conte, Ibid. p. 276. 



1856. Serica robusta Le Conte, Ibid. p. 276. 



1869. Serica valida Harold, Col. Hefte, v, p. 123. 



Specimens examined : S s , 1 9 , from Mitchell and the 

 Pine Ridge region, collected during June and July. This 

 species, like the preceding, is a western form which prob- 

 ably does not extend its range far into the state. It is 

 widely distributed in the Rocky Mountain and Pacific re- 

 gions, and is highly variable in size and color. The writer 

 has examined the Le Conte types and is responsible for the 

 above cited synonymy. The name valida was merely a 

 new name to replace robusta which was preoccupied. 



Melolonthini 

 Middle and hind tibiae with two spurs; last segment of 

 tarsi with two erect setae between the claws; tarsal claws 

 equal; last spiracle placed on the nearly obsolete suture 

 between the fifth sternite and the propygidium. 



Diplotaxis Kirby 

 1837. Kirby: Fauna Boreali-Americana, iv, p. 129. 



1856. Le Conte: "Synopsis of the Melolonthidae of the United 

 States," Journ. Acad. Nat. Sci. Phila., (2) iii, pp. 225-288. 

 (Descriptive notes on 29 species.) 



1909. Fall: "Revision of the Species of Diplotaxis of the United 

 States," Trans. Amer. Ent. Soc, xxxv, pp. 1-97. (Descriptive 

 notes and table for 95 species.) 



207 



