Clamhus] CLAVICORNIA. 1 3 



segment of the abdomen is furnished with a bnisli of liairs, as above 

 mentioned. 



The genus Cybocephcdus is now rightly regarded as belonging to the 

 Clambma rather than to the Nitidulidse. 



ANISOTOMINA. 



This tribe contains a considerable number of small genera, which are 

 distinguished by having the upper surface glabrous or almost glabrous 

 and the anterior coxal cavities closed behind ; the body is oval and 

 convex, and in some genera capable of being contracted into a ball ; the 

 antenna3 and tarsi are very variable, and aUbrd good cliaracters for tlic 

 separation of the genera ; of these about ten are represented in Europe, 

 nine of which occur in Britain ; some of the species are very rare, and 

 many are exceedingly difficult to determine; they are found in moist 

 fungi, under bark, by sweeping herbage at sundown, &c. 



I. Head with distinct antennal groove on its under-side ; 



thorax with the posterior angles rounded ; elytra not 



striated with the exception of a sutural stria which 



is sometimes absent ; tibiae finely spinose ; tarsi 



dissimilar in the sexes. 



i. Club of'antennge 3.jointed Agathidium, III. 



ii. Club of antennae 4-jointt'd Amphicyllis, i>. 



iii. Club of antenuffi 5-jointed, 2nd joint small . . . Liodes, -Er, 



II. Head without or with indistiucL* antennal grooves 



on under-side; thorax with the posterior angles 

 right angles or obtuse, hut not rounded ; elytra 

 more or less plainly striated ; tibiaj distinctly 

 spinose ; tarsi similar in the sexes. 

 i. Base of thorax margined ; posterior tarsi with less 

 than five joints. 



1. Anterior and intermediate tarsi 5-jointed, 

 posterior 4-jointed. 



A. Club of antennae apparently 4-jointed, the 

 second joint being scarcely visible or quite 

 concealed ; mesosternum not carinate . . . CxETDSA, Mr. 

 _ B. Club of antennas plainly 4-jointed, the second * 

 joint being small l)ut distinctly visible ; meso- 

 sternum carinate Anisotoma, 111, 



2. Anterior tarsi 5-jointed, intermediate and pos- 

 terior tarsi 4-joiuted ; club of antennae 3-joiuted. CoLENIS, JSr. 



' 3. Anterior tarsi 4 jointed, intermediate and pos- 

 terior tarsi :-'-joiuted ; club of antennae 5- 



jointed, second joint small Aqaricotbaovs, Schmidt. 



ii. Base of thorax not margined ; all the tarsi 5- 

 jointed. 



1. Club of antennas 5 jointed, second joint small . KYDyoBlVS, SchmicU 



2. Club of anteunai 3-joiuted Teiarthron, Schmidt. 



* Horn mentions Cyrtusa as possessing antennal grooves ; Thomson and Reittcr, on 

 the contrarj-, class it with the species liaving no antennal grooves. 



