Afjathidium.'] CLAVICORNIA. 15 



B. Third joint of the antenna much shorter, 

 scarcely as long as the next two together ; 

 thorax broadest before middle j size smaller 



and narrower . . A. SEMINULUM, L. 



ii. Elytra without sutural atria, impunctate ... A. L-EVIQATUM, Er. 

 II. Elytra with obtuse humeral angles ; species with 

 incomplete ability to roll up into a ball ; tarsi of 

 female variable. 



i. Head with the temples not swollen behind eyes, 

 eyes, when the head is retracted, reaching the 

 angles of thorax. 



1. Elytra without sutural stria, very closely and 



rather distinctly punctured A. MARGINATUM, Sturm. 



2. Elytra with a distinct sutural stria reaching 



from apex to about middle. 



A. Front margin of clypeus broadly and rather 



deeply emarginate A. CONFUSUM, Bris. 



(clypeatum, Sharp ) 



B. Front margin of clypeus truncate or feebly 



bisinuate. 



a. Colour variable, usually brownish yellow, 



with the sides of thorax and the elytra 

 darker ; all the tarsi of female 4-jointed ; 

 elytra impunctate A. VAEIAKS, Beck. 



b. Colour black ; anterior tarsi of female 5- 



jointed ; elytra finely punctured, 

 a*. Antennae unicolorous red ; clypeus not 



separated from forehead by a line . . A. GLOBOSUJT, Muls. 



(convexum, Sharp.) 



b*. Club of antennae, except sometimes apex, 

 black ; clypeus separated from forehead 



by a more or less distinct line ... A. BOTUNDATUM, Gyll. 

 ii. Head with the temples plainly swollen and pro- 

 jecting behind eyes ; eyes not reaching the angles 

 of thorax. 



1. Upper surface less distinctly punctured; left 



mandible of male simple A. NlQBlNtTM, Sturm. 



2. Upper surface more distinctly punctured ; left 



mandible of male very much developed, often 



with a tooth or long horn on its upper surface A. BHINOCEKOS, Sharp. 



A. nig-ripenne, ICug. Head and thorax bright red, elytra deep black, 

 more elongate and less convex than in any of our other British species ; 

 tinder-side blackish or blackish-brown ; antennae reddish with darker 

 club ; head and thorax very finely punctured, the latter transverse with 

 all the angles rounded, a little narrowed in front ; elytra finely but dis- 

 tinctly punctured with faint traces of rows of punctures, and with a deep 

 sutural stria reaching from apex to beyond middle ; legs red. L. 2- 

 2| mm. 



Male with the anterior tarsi slightly dilated, posterior femora termi- 

 nating irj. a blunt tooth. 



Under bark of dead ash and other deciduous trees, at sap, &c. ; local ; not recorded 

 from the London district ; New Forest ; Glanvilles Wootton (dead brambles in May) ; 

 Dean Forest ; Sutton Park ; Needwood ; Markfield, near Leicester ; Sherwood Forest ; 



