190 STUDIES IN AUSTRALIAN ENTOMOLOGY, 



Conte and Horn it is called the "sub-ocular ridge," and concerning 

 it they say {I.e. p. 49), " This ridge is well marked in the Cicin- 

 delidee but has not been observed elsewhere [than in the Broscini] 

 in Carabidfe." I prefer to call it the temporal ridge. 



The Australasian Broscini may be divided into two main 

 divisions by the aid of this feature. 



I. Temporal ridge very indistinct, or incomplete. 

 II. Temporal ridge distinct, or complete. 



In the first division come the genera Mecodema, Metaglymma, 

 Percosoma, Lt/chnus, Oregus and Brullea, and a new genus which 

 is required for Mecodema blngravi, Casteln., and some allied 

 Australian species not yet desci'ibed. The second division con- 

 sists of Promocoderus (in which I include Anheterus, Putz.), Cero- 

 talis, Adotela, Britliysternum and Gnathoxys. 



The following is a tabular view of the genera of division II. 

 a. Prosternum projecting strongly backwards 



behind the coxaj Jhithy sternum. 



aa. Prosternum not projecting backwards behind 

 the cosfe. 

 h. Anterior tibise strongly palmated externally Gnathoxys. 

 hh. Anterior tibite not palmated externally. 



c. Men turn without a median tooth. 



d. Form very convex. ^ with last joint of palpi 



securiform, and the middle tibise not 

 spongiose below Adotela. 



e. Form rather depressed. ^ with last joint of 



palpi cylindrical, thick, and truncate, and 

 the middle tarsi with two or three first 



joints spongiose below Cerotalis. 



cc. Mentum with a median tooth (at least in all 



the species of the Australian continent)... Promecoderus. 



Genus Promecoderus. 



Promecoderus, Dej. ; Spec. iv. 1829 p. 26. Anheterus, V\xtz.* 

 The following are the chief characters of this genus. 



* Stett. Ent. Zeit. 1S6S, p. 345. 



