218 



THE ENTOMOLOGIST. 



A EEVISED CLASSIFICATION OF THE 



GENUS ATEUCHUS, Weber. 

 By John W. Shipp. 



In my list of species belonging to the genus Ateuchus I 

 refrained from using the various subgenera, as the different 

 authors did not characterize their genera sufficiently ; and the 

 whole of the subgenera were in a state of confusion, so that they 

 could not easily be arranged. I have since, however, been able 

 to rearrange and modify these characters so that the several 

 groups may be easily determined as follows : — 



AteucJius''- 



Sebasteos 



Actinophorus = Ateuclietiis 



Parateuchus, n. g. 



Sebasteos, Westw. 



I I 



Ateuchus HeliocantJiarus 



I. Clypeus furnished with two or three deflexed 

 teeth on the under side ; anterior portions 

 of the lateral margins of thorax sinuated ; 

 apex of anterior tibias curved inwards, 4- 

 dentate on outside edge ; a medial tooth 

 on inner edge, two teeth on longitudinal 

 carina on the upper side. Head produced 

 in front ....... 



II. Clypeus simple on the under side ; anterior por- 

 tion of lateral margins of thorax hardly if 

 at all sinuated ; anterior tibijB 4-dentate, 

 not curved at apex, simple on upper side. 

 Head not so produced in front. 

 A. Sides of elytra parallel or subparallel ; abdo- 

 men not cordiform ; extreme apices of the 

 four posterior tibiaB produced into a long 



inarticulate spur, and not truncated. 

 i. Elytra parallel-sided ; pygidium invariably 



twice as broad as long ; lateral margins of 



thorax produced into an obtuse point to- 

 wards the centre nearer the posterior 



angles ; inner margin of anterior tibiae 



slightly sinuated, without teeth 

 ii. Elytra subparallel ; lateral margins of thorax 



rounded, not produced to an obtuse point 



near centre ; inner margin of anterior 



tibiae sinuated, and with two small teeth 



in centre .... Heliocantharus, McLeay. 



'''• See ' Entomologist,' xxviii. p. 40. 



Ateuchus, Weber. 



