Agathidium."] CLAVICORNIA. 19 



tinguished by the presence of a sutural stria, and the very indistinct 

 punctuation of disc of elytra. 



A. nigrinum, Sturm (staphylceum, Gyll.) This and the suc- 

 ceeding species are placed in a separate group by Eeitter together with 

 A. arcticum, Thorns., and A. discoidetmi, Er. ; the species belonging to 

 this group are easily distinguished by having the temples swollen and 

 projecting behind the eyes ; A. nigrinum is the largest British species of 

 the genus ; in general appearance it much resembles A. atrum, but is 

 rounder and more globose ; in colour it varies, being usually black or 

 pitchy black with the edges of thorax and apex of elytra pitchy-brown, 

 but varieties occur which are almost entirely of a light pitchy-brown 

 colour ; head very finely punctured, antennae reddish, with club, except 

 apex, dark ; thorax short and convex, hardly visibly punctured, broadest 

 behind middle ; elytra plainly and rather thickly punctured, with a 

 sutural stria reaching from apex to middle ; breast black, abdomen reddish- 

 brown ; legs reddish-brown, or pitchy, with tarsi lighter. L. 3 mm. 



Male with the anterior tarsi slightly dilated, female with the tarsi 

 5- 4- 4-jointed. 



In dead leaves, faggot stacks, fungoid growth, &c. ; not common 5 Chatham, 

 Darenth Wood, Caterham, Sanderstead, Coombe Wood, Shirley, Esher, Weybridge, 

 Highgate, Lough ton, &c. ; Hastings; New Forest; Sherwood Forest; Need wood ; 

 Ripon ; Manchester district ; Northumberland district, rare, Bothal, Gibside, Gos- 

 forth, banks of Irthing. Scotland, Lowlands, Highlands, under bark, rare, Solway, 

 Forth, Tay, and Moray districts. 



The pale variety is the A. staphylceum of Gyllenhal (Ins. Suec. ii. 569. 

 13), which he expressly says has a 3-jointed club ; it cannot therefore be 

 referred to the var. ferrugineum of Amphicyllia globus, with which many 

 authors identify it. 



A. rhinoceros, Sharp. Allied to the preceding species, but 

 evidently more acuminate behind, and more distinctly punctured, with a 

 more deeply impressed sutural stria, and with the antennte rather stouter, 

 the apical joints being more transverse ; the colour is usually deep pitchy 

 red, sometimes almost black, and the legs are of a dark reddish-brown 

 colour ; the chief peculiarity, however, lies in the extreme development 

 of the left mandible of the male, which in some cases is only increased 

 in length and curved, in others bears a short tooth on its upper surface, 

 and in others has this tooth prolonged into a very long, elevated, recurved 

 horn reaching far above the head ; female with tarsi 5- 4- 4-jointed. 

 L. 2|-2 mm. 



Under bark of dead fir, &c. ; Rannoch, Perthshire (first taken by Messrs. Sharp 

 and Bishop in the autumn of 1864). I have also received it from the same locality 

 from the Rev. A. E. Hodgson. 



AIMPHICYLLIS, Erichson. 



This genus contains two European species, one of which is found in 



c 2 



