COLEOPTERA. 571 



These Insects have no apparent eyes. The maxillary palpi are 

 very short, without distinct articulations, and with two terminal 

 hooks. The two first joints of the tarsi are very short; the third 

 and last is very long-, with a single hook at the extremity. 



These Pselaphii are found under stones in barren localities, and 

 even in the hills of certain small yellow Ants. An excellent Mono- 

 graph of this genus has been published by M. Miiller, in the third 

 volume of the Magasin der Entom. of M. Germar(l). 



Articerus, Dalm. 



Where the antennae appear to be composed of a single joint, form- 

 ing a cylindrical and elongated club, truncated at the extremity. 

 The eyes are distinct and the tarsi are terminated by two hooks(2). 



The tarsi of the Dermestes atomarius of De Geer having appeared 

 to M. Leclerc de Laval to be composed of but one joint, with this 

 Insect and some others we formerly established a new division of 

 the Coleoptera, that of the Monomera, which has been adopted by 

 M. Fischer in his Entomographia Imperii Russici, and who, with 

 this Insect, has formed anew genus which he names Clambus. But 

 it appears Gyllenh., Insect. Suec. IV, p. 292, 293 that M. Schup- 

 pel, who of all our entomologists has accustomed himself the most 

 to minute and delicate observations, has made the same section under 

 the nameof Ptilium. M. Gyllenhall had united the species with the 

 Scaphidia, and, in fact, we think that the proper situation of this new 

 genus will be found in the vicinity of the latter. 



(1) See also Gyll., Insect. Suec, IV, p. 240. 



(2) Articerus armatus, Dalm., Insects in Copal, p. 21, tab. v, f. 12. According 

 to this figure, the tarsi are provided with two hooks. 



