SILPHIDiE. OICEOPTOMA. 23 



bescence, with numerous elevated naked tubercles : elytra with three elevated 

 flexuous longitudinal lines, with transverse slightly glossy wrinkles and tubercles 

 between each, frequently united to the carina?; towards the apex of the elytra 

 on the extreme carina is a larger transverse elevation, or tubercle; the apex 

 of the elytra is obsoletely sinuated : body beneath black, with cinereous pu- 

 bescence, the apex rufescent. 

 Extremely variable in size ; and slightly so in form, some examples being more 

 elongate than others. 



Abundant throughout the metropolitan district, also found near 

 Dover, Hastings, Brighton, Shoreliam, the Isle of Wight, &c. 

 " Very common in Cambs." — Rev. L. Jenijns. " Riverhead, Kent." 

 Mr. Ingpen. " Netley, Southend, &c." — Rev. F. W. Hope. 

 " Epping." — Mr. Doubleday. " Abundant on the banks of the 

 Thames, Plaistow marshes, and near Walthamstow. 1 ' — A. Cooper, 

 Esq. " Parley." — J. C. Dale, Esq. " Very common in carrion, 

 particularly in dead rooks in the rookery at Penllergare.''' — L. W- 

 Dillwyn, Esq. " Carlisle." — T. C. Hey sham, Esq. " Scarborough." 

 — T. Bean, Esq. 



B. Elytra of the females emarginate at the apex. 



Sp. 4. sinuata. Nigra obscura, capite thoraceque pubescens, hoe subemarginato 

 tuber culato ; elytris glabris, trilineatis. (Long. corp. 4 — 5 lin.) 



Si. sinuata, Fabricius. — Bon. xv. pi. 539. — Oi. sinuata. Steph. Catal. 76. 

 No. 810. 



Elongate-ovate ; obscure black ; head clothed with rufo-cinereous pubescence : 

 thorax nearly as in the preceding, but the angles more rounded and the hinder 

 margin less sinuated : the disc clothed with cinereous down, with numerous 

 glabrous elevated spots; elytra glabrous, oblong-ovate, obscure black, finely 

 punctured, with three acute elevated lines ; the interior straight, the exterior 

 arcuated beyond the ordinary tubercle towards the apex of the elytra : body 

 beneath pubescent, with the apex piceous ; legs black ; tarsi piceous. 



In the male the elytra are subtruncate; and in the females they are produced 

 at the apex of the suture into an elongate rounded lobe, exterior to which is a 

 deep sinuated emargination. 



•j-Var. /3. With the lateral margins of the thorax deeply excised at the base, 

 leaving an acute process, pointing backwards; the hinder margin also excised 

 near the hinder angles, and sinuated in the middle. 



Very abundant near London and in other parts. " Bottisham 

 and elsewhere; but is much less plentiful than Oi. rugosa. 11 — Rev. 

 L. Jenyns. " Riverhead."— Mr. Ingpen. Ci Netley, Southend, 

 Sic"— Rev. F. W. Hope. " Epping."— Mr. Doubleday. « East 



Mandibulata. Vol. III. 31st May, 1830. d 



