A REVISION OF THE GENUS CLIDICUS. 15 



not simply synonymous with grandis Cast. , because the 

 specimen in the Hofmuseum of Vienna, which Reitter has 

 described as Ganglbaueri , belongs to a form of grandis 

 with smaller, not perfectly rounded thorax, which I find 

 also among the grandis-si^ecimens of the Museum of Leyden 

 and which must be considered as a variety of grandis^ whose 

 typical form has a larger , perfectly globose thorax. Per- 

 haps it will be proved later , that this difference is only 

 of sexual or individual character; but meanwhile it will be 

 safer to retain Ganglbaueri as a variety of grandis. Finally 

 I found in the collection of the Leyden Museum a speci- 

 men named (but not described) as villosulus Vollenh., 

 which is identical with formicarius Pasc. 



The Clidicus of the Hofmuseum of Vienna and of the 

 Rijksmuseum of Leyden , being sent to me for revision by 

 the kindness of Messrs. Ganglbauer and Ritsema, I think 

 it not superfluous to give a short systematical synopsis based 

 on 23 specimens of the 3 above named species *), adding 

 also some biological remarks. 



The three species of Clidicus agree in tlieir large size, 

 brown or yellowish brown colour , in the ochraceous vil- 

 losity, which is always longer on the elytra , in the sharp , 

 ant-like division of the body into three parts, the head being 

 connected with the thorax by a short neck , the thorax 

 highly convex and rounded anteriorly and posteriorly , the 

 elytra convex and ampliated , and in the long, slender, 

 ant-like legs. — They differ especially in the form of 

 the head , in the length of the antennae and in the sculp- 

 ture of the elytra: grandis and formicarius have the head 

 posteriorly bilobate, in taphrocepkalus it is simply 

 rounded; the antennae attain in formicarius \ , in 

 grandis | of the length of the body, in taphrocepkalus 

 they are as long as the body ; the elytra are in grandis 

 rather superficially striated, with plain intervals, in formi- 



1) Jirineus motisfrosus Walk, (thorace subquadrato) belongs also to this 

 genus according to Pascoe (loc. supra cit.), but is unknown to me. 



Notes from the Leyden Museum, Vol. XVIII. 



