RHYPAROCHROMJ,D.E. 219 



Eare. Southend, September ; Wicken Yen, among old sedge. 

 May (Dr. Power). 



Genus 17. — Ischnodemus, Fieb. 

 Narrow, linear. 



Head 5-sided, short, not so wide as the pronotum, narrower 

 behind the eyes ; Crown almost flat between the eyes, posteriorly 

 convex ; Face short ; central lobe wide and prominent ; side lobes 

 shorter, pointed. Antennce placed on a short, truncate process 

 before and below the eyes ; 1st joint very short, thick, reaching 

 rather beyond the end of the face ; base petiolated, inner side 

 rounded, apex truncate ; 2nd and 3rd more slender, each gradually 

 thicker from base to apex ; 2nd 3 times as long as the 1st ; 3rd |rds 

 as long as the 2nd ; 4th as long as the 2nd, and as thick as, or 

 thicker than, the 1st, fusiform. Eyes rather large, oval, prominent 

 behind. Ocelli small, distant. Eostrnm reaching to the middle 

 of the mesosternum ; length of the joints subequal ; 1st \ as long as 

 the head. 



Thorax. — Pronofum trapezoidal, flat ; anterior angles much 

 rounded and narrowed, anterior margin incrassated ; sides not mar- 

 gined, but rounded ofi" ; hinder angles squarely rounded ; posterior 

 margin very concave. ScuteJhim large, triangular, posteriorly 

 somewhat depressed on each side. Elytra (when developed*) 

 shorter than the abdomen ; Corium ; anterior margin straight ; 

 Memhrane with 5f straight nerves arising at the base. Sternum; 

 Coxae deeply sunk in tlie segments ; Prosternum with a slight ridge ; 

 Mesa- and 3Ietasternii7n with a deep rostral channel ; xyphus of the 

 former long, triangular, of the latter short. Legs short, strong ; 

 thighs thick, fusiform, unarmed; tarsi; 1st joint on the 1st and 

 2nd pairs not so long as the 3rd ; on the 3rd pair subequal ; 2nd 

 joint very short and thin ; 3rd stout, widened to the apex; Claws 

 divergent, short, very much curved. 



Abdomen above flat ; Comiexivmn equally deep throughout, 

 almost vertical. Underside convex ; 1st 4 segments with the pos- 

 terior margin straight ; 5th short in the middle ; 6th long, cleft 



* The development of the elytra and wings is exceptional; the insects 

 usually appear with rudiments of the elytra only. 

 f rieber says 4 (' Europ. Hem.,' p. 44). 



