Scarabaeidae of Nebraska 129 



with' shallow punctures which coalesce transversely and form 

 wrinkles puncticauda 



Pygidium finely and very densely wrinkled or roughened; 

 clypeus finely and sparsely punctate trachypygus 



Dyscinetus puncticauda Casey. 



1909. Dyscinetus puncticauda Casey, Can. Ent., xli, p. 282. 



Specimens examined: 5 (5,4 9, from Culbertson, 

 North Platte, Gothenburg and Red Cloud, collected from 

 June 13 to July 3, at lights. This is probably a very com- 

 mon species through central and western Nebraska. 



Dyscinetus trachypygus Burmeister. 



1856. Chalepus trachypygus Burmeister, Handbuch der Entomologie, 

 V, p. 79. 



Spcimens examined : 1 ,j , 1 9 , from Lincoln, collected 

 in May and June at lights. 



Ligyrodes Casey 

 1915. Casey: Memoirs on the Coleoptera, vi, pp. 178-186. (De- 

 scriptive table for 5 forms). 



SYNOPSIS OF THE SPECIES 



1. Pronotum and elytra black or piceous, moderately shining; 

 clypeal apex broader, less elevated and more deeply emarginate; 

 median, external tooth of mandibles less strongly and acutely 

 produced; male genital armature with the subterminal, lateral 

 tooth of the claspers nearly as broad basally as high relictus 



Pronotum piceous to black, elytra dark red, surface more 

 strongly polished and shining; clypeal apex much narrower and 

 more strongly elevated, and less deeply emarginate; median 

 external tooth of mandibles more strongly and acutely pro- 

 duced; male genital armature with the subterminal, lateral 

 tooth of the claspers only half as broad basally as high 

 n. sp. in MS Casey 



Ligyrodes relictus Say. 



1823. Scarabaeiis relictus Say, Journ. Acad. Nat. Sci. Phila., v, p. 

 194. Le Conte ed., ii, pp. 296-297. 



235 



