534 SEEBICOENIA. 



five of which appear to be undescribed. The chief characters of the genus are : — The 

 deeply inserted head ; the convex, acuminate front, the anterior margins of which are 

 strongly reflexed and meet at an angle in the centre ; the inferior marginal carina of 

 the thorax, this carina being replaced at the sides by a lateral carina — variable in 

 length according to the species, and in many of them nearly reaching the apex, — the 

 two meeting at the apex of the hind angles ; the long basal joint of the antennae ; the 

 widely separated double prosternal sutures, the enclosed space being excavate in front 

 for the reception of the base of the antennse ; the feebly dilated posterior coxal plates 

 (except in G. dugesi) ; the lamellate fourth tarsal joint ; and the pectinate claws. 



The species — many of which vary greatly in colour and size, or differ to some extent 

 sexually — may be readily grouped by the form of the prosternal process, the greater or 

 less approximation of the thoracic carinas, and the relative length of the lateral one ; 

 in some few species the inferior marginal carina is partly obliterated behind. In 

 G. angulatus and others the elytral epipleurae are conspicuously angulate opposite the 

 hind coxae, and even hollowed for the reception of the apices of the femora. In 

 G. mimeticus, Horn, the elytra are carinate near - the sides at the apex. Some of the 

 less elongate, small species superficially resemble the genus Anchastomorphus. 



These insects, nearly all of which are very small and inconspicuous, resembling small 

 Agriotes, are found upon herbage, and most of the novelties described have been found 

 in abundance. 



a. Prosternal process acuminate, more or less V-shaped, margined to the apex or 

 nearly so, the slender posterior portion distinctly grooved or punctured down 

 the centre *. 

 a'. Posterior coxal plates somewhat broadly and abruptly dilated in their inner / 



third ; prothorax subquadrate, about as long as broad dugesi. v 



b '. Posterior coxal plates moderately and more gradually dilated in their inner 

 third. 

 a". The lateral and inferior marginal carinse of the prothorax widely separated 

 anteriorly, the inferior carina strongly sinuate behind. 

 a"'. The lateral carina nearly reaching the apex. 

 a 4 . Elytra narrowing from about the basal third. 



a 5 . Prothorax a little broader than long, subquadrate (at least in 

 the (£) ; inferior marginal carina sharply defined throughout; 



propleurse rather coarsely punctured quadraticollis. {/ 



b\ Prothorax much broader than long, rounded at the sides anteriorly 



in both sexes ; inferior marginal carina becoming faint behind ; 



propleurae sparsely and finely punctured brevicollis. K ■ 



* The ante-apical tooth is taken as the apex, the internal (or lower) prolongation of the process being hidden 

 within the mesosternal cavity. 



