608 



Coleopterological Notices, VI I. 



Fig. B. 

 1. Male antenna of H. albionica; 2. 

 same of R. binodi/er; 3. same of R. ar- 

 ticularis; 4. same of R. spatuUfer; 5. 

 same of R. fusticornis; 6. same of R. 

 propinqua. 



R. Ibinodifer. — Convex and rather 

 strongly ventricose, dark brown with 

 paler rufous elytra and legs, the antennae 

 infuscate; body subimpunctate through- 

 out, the pubescence short, subdecum- 

 bent and moderately abundant. Head 

 distinctly narrower than the prothorax, 

 with normal fovese, the eyes small but 

 very convex, at fully their own length 

 from the base; antennae as shown in the 

 accompanying figure, the under surface 

 of the two dilated joints with small 

 acute tubercles bearing more prominent setse. Prothorax a little more than 3^ 

 as wide as the elytra, widest before the middle, rather transverse, the fovese 

 normal. Elytra about % wider than long, the sides broadly arcuate and 

 moderately divergent; humeri well developed; striae and fovese normal. .46- 

 domen nearly as wide as the elytra and fully M as long, the carinae feebly ar- 

 cuate, strongly divergent, extending to basal % and separated by }{ the total 

 width. Length 1.4 mm.; width 0.7 mm. 



Vancouver Island. 



The intermediate tibiae of the male are slightly thickened and 

 have a strong oblique spur projecting inwardly from near the tip, 

 the hind tibise bent at the middle and thence strongly compressed, 

 dilated and excavated to the apex. 



R. articularis. — Body nearly similar but a little shor'er and more ven- 

 tricose, similarly subimpunctate, pubescent and polished, black, the elytra 

 dull rufous, the legs paler; antennae blackish, paler toward base. Head rela- 

 tively larger, almost as wide as the prothorax, the eyes small but very promi- 

 nent, at fully their own length from the base; antennae distinctly longer than 

 the head and prothorax, as shown in the figure, the under surface of joints 

 five and six asperate and sparsely clothed with dilated squamiform hairs. 

 Prothorax distinctly smaller and less transverse than in binodifer, rather less 

 than }4 as "wide as the elytra, widest before the middle, the fovese normal. 

 Elytra and abdomen nearly as in binodifer, but with the strongly divergent 

 carinae straight and extending almost to the middle of the disk, separated at 

 base by ^q of the total width. Length 1.4 mm. ; width 0.73 mm. 



Southern Colorado. 



Allied closely to binodifer, but distinguished by the characters 

 stated ; it inhabits the high mountainous regions of the State. 



R. fusticornis. — Eather strongly ventricose and convex, polished, sub- 

 impunctate throughout, dark brown in color, the abdomen black ; elytra 

 bright red, the legs dark red-brown; antennae blackish toward tip; pubescence 

 very short and subdecumbent, not very abundant. Head almost as wide as the 

 prothorax, nearly as in the preceding species, the antennae as in the accom- 



