7l> TERTUKY COLEOPTERA OF NOHTH AMKHK'A. 



The species closely resembles the preceding in general appearance, but 

 is smaller and is at once distinguished by tin- equal density and coarseness 

 nt' the abdominal granulations as compared with those of the thorax and 

 elytra. 



Length, 4.8 to f>.l nun.; breadth, 1.3 mm. 



Florissant, ('olorado: two specimens, Xos. 11:23, '2803. 



This species comes close to the fossil Stenus prodromus Heer from Aix, 

 which I should look upon as a Bledius. 



BLEDIUS OSBORNI sp. nov. 

 PI. VIII. iigs. 11. 1-2. 



This species, smaller than the last, but closely resembling- it in general 

 appearance, differs from it and from B. morsci in its more finely granulate 

 bodv and stouter legs, and from all other species described, living and fossil, 

 in the coarseness of the antenna'. The* body is piceous throughout. The 

 head is as broad as the thorax, subquadrate, of equal length and breadth, 

 the surface exceedingly finely granulate, or in places with irregular trans- 

 verse striation, which if broken by equally deep opposing stria' would form 

 similar granulations. Antenna' reaching to the posterior edge of the thorax, 

 stout, enlarging but slightly and with perfect uniformity from the second 

 joint outward, the first joint not very long and not greatly enlarged apically. 

 the second scarcely smaller at base than the apex of the first, and as large 

 as it at apex, being like the succeeding joints cuneiform with slightly con\'ex 

 sides and rounded apical angles, the second to the fourth joints a little longer 

 than broad, the fifth to the eighth about equally long- and broad, the ninth 

 and tenth a little broader than long and half as broad again as the second, 

 the apical joint subrotund, slightly longer than broad. Thorax of the length 

 of the head, equal, the surface very finely granulate, the granules so arranged 

 as to give somewhat the appearance of longitudinal headed combings. 

 Legs short and rather stout, the tibia- scan-el v enlarging apically. Elytra 

 a little longer than the thorax, broader than long, delicately and rather 

 feeblv granulate. Abdomen half as long again as the rest ot the hodv, as 

 broad at base as the thorax, with parallel sides, tapering onlv in the last 

 three segments, the tip bluntly pointed, the surface delicately and especially 

 above rather sparselv granulate, very finelv and very sparsely pubescent 

 both above and below. 



