Mr. C. J. Gahan — Notes on Cleridae. Gl 



of the genera referred to the group, the acetabula of the 

 front coxae are niore widely open behind than in any other 

 genus of Cleridae, the epimera not being in the least pro- 

 duced behind the coxae. Callimerus differs also from other 

 Tillini in the form and structure of the eyes and antennae, 

 these being more suggestive of what obtains in the Hydno- 

 cerini. I think, therefore, that, notwithstanding the length 

 and distinctiveness of the first tarsal joint, the genus has no 

 close natural affinity with the Tillini, and should be regarded 

 as the type of a separate group. 



Gastrocentrum, Gorham. — To this genus the Notoxus 

 unicolor of White belongs, the latter species being identical 

 with G. pauper, Gorh., the type of the genus. 



The Tillus dux of Westwood should also, I think, be 

 referred to Gastrocentrum. It is in form and general 

 structure very like G. unicolor, White, and agrees with it 

 in having the basal tooth of the tarsal claws very small and 

 obtuse, not sharp and distinct as it is in the genus Tillus. 



Cylidroctenus, Schklg. — Herr Schenkling, who first cha- 

 racterized this genus, has placed it in the group Clerini 

 immediately after Tillicera, Spin. He was wrong, however, 

 in stating that it has the same kind of tarsi as Tillicera. 

 The first joint of the tarsi is quite distinctly visible from 

 above, especially in the hind tarsi, where it is quite as long 

 as the second joint. The claws, moreover, are not simply 

 appendiculate at the base as in Tillicera, but furnished with 

 two teeth, a stout one near the base and a more slender one 

 towards the apex, the kind of structure met with in Tillus 

 and other genera of Tillini. The condition of the gula is 

 also very much the same as in Tillus, so that I believe 

 Cylidroctenus to be on the whole very nearly allied to Tillus ; 

 it ought certainly to be placed in the same group. 



Strotocerus, Schklg. (1902), seems to be hardly distinct 

 from Dip I op h or us, Fairm. (188/). 



The Group Clerini. — In deciding upon the affinities of 

 genera within this group certain characters, such, for 

 example, as the structure of the antennae, seem to me to 

 have been taken too much into account, while others have 

 been almost or quite neglected. I find that Lacordaire, 

 Leconte and Horn, and Schenkling seldom or never mention 

 the condition of the front coxal cavities, whether closed or 

 open behind, in the genera they have characterized. And 

 yet this condition has been made to play an important part 

 in the classification of many other families of beetles. 

 Leconte and Horn do, in fact, state in their definition of the 



