Cej'henmiim.] cl.vvicorxia. 85 



oval, very iinoly and ratlier thickly puucinved, each -wiili a deep fovea 

 in middle of baf^e, apex and also the pygidiuni reddish. L. 1 mm. 



Male Avith the anterior tibia3 sliglitly thickened towards apex, and 

 slightly curved before apex ; mctasternum deeply impressed. 



In moss, &c. ; not uncominou and ratlier generally distributed in the London and 

 Soutliern disliicts, and it occurs generally in some of the niiilhmd districts, but tliiro 

 appiars to be no record from further north tliau lleptou, Burtou-ou-Trent (where it 

 is rare) ; it does uot occur in Scotland. 



(C. intermediuxn, Aube. A single specimen of an insect, named 

 as this species by M. Fairmaire, was taken by the Eev. A. Matthews 

 near Silcliester, Hants, in 1859, and described by him in the Zoologist 

 for 1862 (797G) ; according to Mr. Matthews the species may be known 

 by its dark colour, smaller thorax, rather longer antenna3, and more 

 elongate shape ; according to Aube's description, however, the shape 

 should be shorter, so that M. Fairmairc's determination of the specimen 

 appears to be doubtfully correct ; the species appears to be represented 

 in many collections by colour varieties of C. thoracicum). 



CLAVIGERID^. 



The species that fonu this family are by many authors included as a 

 tribe under the Pselaphidse, "R'ith Avhich they liave some points in 

 common ; at the same time they differ so widely as a whole from these 

 latter, that it is best to separate them off as a family ; they may be 

 distinguished by their long cylindrical head and curiously formed 

 abdomen, of which the front segments are connate, as well as by their 

 gereral contour ; the number of joints in the antennae varies fr(mi two 

 to six, and the palpi are one-jointed and inconspicuous ; these points, as 

 a rule, serve to distinguish them from the Pselaphidae, which generally 

 have the antenna 11-jointed and the palpi 3- or 4-jointed and long and 

 conspicuous ; abnormal species of Pselaphidaj, however, occur, which 

 resemble the Clavigeridae in these characters ; the tarsi are 3-jointed, 

 the first and second joints being very short, and the third long, and 

 terminated by a single claw ; many of the species are totally devoid of 

 eyes ; they live with ants Avhich, by caressing the tufts of hair that 

 grow on their abdomen, cause the exudation of a fluid ; this they 

 swallow greedily, and in return appear to support the Clavigers, which 

 seem to have lost the natural instinct of feeding themselves ; as Sir 

 John Lubbock observes (Ants, Bees, and Wasps, Int. Scientific Series, 

 p. 84), the slave-making ant and Claviger and certain other myrme- 

 cophilous beetles are the only cases in nature of an animal having lost 

 this instinct. We possess one species only of the family in Britain, 

 which is local but not uncommon where it occurs. 



GIiAVZGSR, Preyssler. 

 This genus contains seventeen or eighteen European species and one 



