Agathldiiim.'] 



CLAVICORNIA. 



15 



B. Third joint of the antenna} mnch shorter, 

 scarcely as long as the next two together ; 

 tliorax broadest before middle; size smaller 



and narrower . . 



ii. Elytra without sutural atria, impunctate . . . 



II. Kl\tra 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. 



Elytra without sutural stria, very closely and 



rather distinctly punctured 



Elytra with a distinct sutural stria reaching 



from apex to about middle. 

 A. Front margin of clypeus broadly and rather 

 deeply emargiuate 



A. SEMINULtJM, L. 

 A. L^VIGATCM, Er. 



1. 



2. 



A. MARGINATUM, Sturm. 



B. Front margin of clypeus truncate or feebly 

 bisiuuate. 



a. Colour variable, usually brownish yellow, 



with the sides of thorax and the elytra 

 darker; all the tarsi of female 4-jointed ; 

 elytra impunctate 



b. Colour black ; anterior thrsi of female 5- 



jointed ; elytra finely punctured, 

 a*. Antennae unicolorous red ; clypeus not 

 separated from forehead by a line . . 



I)*. Club of antenn£B, except sometimes apex, 

 black ; clypeus separated irom forehead 

 by a more or less distinct line . . . 

 . 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 



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. CONFUSUM, Bris. 

 (cl^peaium, Sharp ) 



A. VABIANS, Beck. 



A. OLOBOStlM, 3Illls. 



{convexum, Sharp.) 

 A. EOTUNDATUM, Gijll. 



A. NiGKiNtTM, Sturm. 



A. EHINOCEEOS, Sharp. 



A. nigripenne, Kug. Head and tliorax bright red, elytra deep black, 

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

 under-side blackish or l)lackish-brown ; antennaj 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 Avith the anterior tarsi slightly dilated, posterior femora termi- 

 nating in a Ijlunt tooth. 



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

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

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



