360 



RHVXCHOPHORA. [Ceutliorihynchidius. 



their general shape, and from Bhytidosomus by having the elytra cut 

 back more angularly at the shoulders. 



I. Tarsal claws simple ; femora, as a rule, not or very 



obsoletely toothed." 



i. Elytra with strong rows of closely set punctures, 

 but without distinct engraved stria? ; interstices 

 narrow ; upper surface shiny 



ii. Elytra with distinct stria? : interstices broader ; 

 upper surface usually rather dull. 



1. Thorax finely and very closely punctured, the 

 punctuation being almost concealed by the 



scales. 



A. Thorax trapezoidal ; base almost straight . 



B. Thorax not trapezoidal ; base bisinuate, 



slightly produced towards scutellum. 



a. Elytra with a row of white hairs inserted 



in the striae, 

 a*. Anterior margin of thorax not raised; 



suture of elytra more thickly clothed 



with whitish scales than disc .... 

 b*. Anterior margin of thorax raised ; 



clothing of elytra evenly distributed . 



b. Elytra without white hairs inserted in the 



stria?, 

 a*. Thorax with a small but distinct 



tubercle on each side 



b*. Thorax without or with a very in- 

 distinct tubercle on each side, 

 at- Tibiae and more or less of rostrum 

 red; thorax not strongly transverse . 

 bf. Tibiae in great part and rostrum 

 black ; thorax strongly transverse 



2. Thorax distinctly and rather coarsely punc- 

 tured ; upper surface black with a patch of 

 white scales at base of thorax and at scutellum 

 and with the apex of elytra more or less plainly 

 reddish 



II. Tarsal claws dentate beneath or appendiculate on 

 their inner side ; femora, as a rule, at all events 

 the posterior pair, plainly toothed. 



i. Size large ; upper surface rough and scabrous ; 

 interstices of elytra with single rows of long stiff 



npright setae ; colour reddish-brown 



ii. Size smaller; elytra not scabrous, bearing on 

 each interstice one, two or three rows of recumbent 



hairs. 

 1. Upper surface black or pitchy black; thorax 



without longitudinal grey lines. 

 A. Club of antennas pyriform ; thorax rather 

 convex ; elytra convex and rounded, with the 



C. POSTHTTMUS Germ, 

 (pumilio, Gyll.). 



C. NIQRINUS, Marsh. 



C. MELANABITTS, Steph. 

 C. HEPATICUS, Gyll. 



C. F1OBALIS, Payk. 



C. PYBBHOBHYNCUS, Marsh. 

 C. PULVINATUS, Gyll. 



C. TERMINATES, Herbst. 



C. HOEEIDUS, Pane. 



* Tn the case of C. terminatus some specimens have the posterior femora plainly 

 toothed, whereas hi others the teeth are obsolete or absent ; I am not sure whether 

 this difference is sexual or not. 



