266 CLAVICORNIA. [RhizopJiagus. 



brownish-red with disc of latter darker, elytra brownish-red or blackish 

 with extreme side margins, apex, and basal fourth part red, the colour, 

 however, being somewhat variable in extent ; head large, especially in 

 male, eyes prominent ; thorax considerably longer than broad, more so in 

 the male than the female, plainly punctured on disc, more finely at sides ; 

 elytra with distinctly and regularly puuctured striae, sutural stria deeply 

 impressed behind middle ; antennae and legs ferruginous ; last segment 

 of abdomen with a distinct impression, terminated on each side by a 

 small raised prominence. L. 2|-4-| mm. 



Under bark, at sap, &c. ; rare; Sutton Park, Birmingham; Hopwas Wood, Tarn- 

 worth; Cannock Chase ; Need wood ; Matlock ; Sherwood Forest ; Scotland, R mnoch 

 (Power and Champion). Mr. W. G. lilatch has been more successful in finding this ' 

 rare insect than any other British'entomologist.* 



R. dispar, Gyll. Closely resembling the preceding species in colour, 

 but smaller, and rather natter, and with the colour rather more variable ; 

 head large, especially in male, eyes prominent ; thorax evidently longer 

 than broad, more so in the male than in the female, finely punctured at 

 sides, more plainly on disc ; elytra with plainly punctured striae, sutural 

 stria strongly deepened, esp3cially behind ; antennae and legs ferruginous ; 

 last segment of abdomen simple in both sexes ; size as in the preceding 

 species very variable. L. 2-4 mm. 



Not uncommon at sappy bark of pines, poplars, &c., in the Midlands and North of 

 England, and in Scotland and Ireland ; it, does not, however, apparently occur in the 

 London district or the South ; in Scotland it is sometimes found in profusion under the 

 bark of conifers ; it is occasionally found in fungi on decayed trees. 



R. bipustulatus, F. (longicollis, Gyll., $ ). Rather flat, pitchy- 

 black or brownish-black, with a plainly defined yellowish-red spot on each 

 elytron a little before apex ; the shoulders also are often slightly reddish ; 

 head in both sexes somewhat narrower than thorax, thickly and some- 

 what finely punctured ; thorax not much longer than broad, with sides and 

 anterior and posterior angles slightly rounded, distinctly and not very 

 closely punctured ; elytra with plainly and regularly punctured strise, 

 sutural stria deepened behind ; antennae and legs ferruginous j size and 

 colour very variable. L. 2-3| mm. 



Under bark, at sap, &c. ; common and generally distributed throughout the king- 

 dom. 



This species varies very much in colour, some specimens being light 

 pitchy-brown, and others testaceous ; the former may easily be distin- 

 guished, as the two spots on the elytra are always distinct, if the ground 

 colour is at all darker ; pale immature examples, however, may -sometimes 

 be confused with R. perforatus, but the rounded sides and angles of 

 thorax, which is also more closely and less strongly punctured, and the 

 more plainly punctured striae of elytra will serve to distinguish them. 



* Mr. Homer and Mr. Blatch have recently taken a species allied to R. nitidulus in 

 Sherwood Forest, which appears to be uudescribed. 



