Coleopterological Notices, VII. 



6-09 



panying figure. Prothorax scarcely more than % wider than long and not 

 quite % as wide as the elytra, widest well before the middle, the foveas nor- 

 mal. Elytra fully % wider than long, the humeri broadly exposed and well 

 developed ; sides moderately divergent and broadly arcuate. Abdomen nearly 

 as wide as the elytra and distinctly shorter, the carinse fully }4. ^s long as the 

 first segment, strongly divergent, straight and separated at apex by slightly 

 more, at base by a little less, than }i the entire width. Length 1.25 mm.; 

 width 0.7 mm. 



California (northern coast regions). 



Closely allied to the preceding species and to albionica, but dis- 

 tinguished by the thick and nearly cylindrical antennae from the 

 fifth joint; the under surface of the enlarged outer joints is flat- 

 tened and roughly scabrous as far as the club. 



R. spatulifer. — Body only slightly ventricose, convex, highly polished, 

 impunctate throughout, piceous-black, the elytra not paler or only feebly 

 rufescent ; antennae and legs blackish, the latter paler distally ; pubescence 

 short and decumbent, not very abundant, ffead as wide as the prothorax, 

 normally f oveate, the eyes small but prominent, at fully their own length from 

 the base ; antennae longer than the head and prothorax, as in the figure, the 

 under surface of joints five and six alone modified and more coarsely setulose. 

 Prothorax nearly % wider than long, }4 ^-s wide as the elytra, widest before the 

 middle, normally foveate, the lateral foveae deep. Elytra fully ^^ wider than 

 long, only moderately developed at the humeri, the sides strongly divergent 

 and broadly arcuate, the usual striae and foveae distinct. Abdomen nearly as 

 wide and almost as long as the elytra, the first segment uniisually elongate, 

 less than 2}4 times as wide as long, the carinse straight, % as long as the seg- 

 ment, only moderately divergent, separated at base by fully }4 ^^^ entire 

 width and at tip by much more. Length 1.2 mm. ; width 0.6 mm. 



Canada (Ottawa). Mr. W. H. Harrington. 



This species may be readily distinguished 

 from the three preceding, and albionica, by its 

 smaller size, blackish elytra with narrower hu- 

 meri and more divergent sides, and more elon- 

 gate first segment of the abdomen. 



These four allies of albionica form with that 

 species a well-marked group, distinguished by 

 the spatulate and excavated hind tibiae of the 

 male ; it includes also propinqua, in which the 

 tibial dilatation becomes much less distinct as 

 shown in the figure. The sexual characters at the 

 abdominal apex are virtually similar through- 

 out, the last ventral being flattened slightly and lobed at apex, 



Fig. C. 

 1. Male hind tibia 

 of a. articularis; 2. 

 same of M. albionica; 

 3. same of -K. fusti- 

 cornis; 4. same of i2. 

 propinqua. 



