STAPHYLINIDxE. 73 



Leng-tli of body, 4.25 mm.; of anteiuiae, 1 mm.; bi'eadth of base of 

 abdomen, 0.65 mm. 



Florissant, Colorado; three specimens, Nos. 7713. 12770, and of the 

 Princeton museum, 1.554 and 1.605. 



Named for my friend, Prof H. F. Osborn, now of Columbia, but when 

 this description was drawn up, of Princeton University. 



BlEDIUS PRIMITIARUM Sp. UOV. 



PI. VIII, fig. 13. 



Head ovate, considerably longer than broad, with gently rounded sides, 

 strongly rounded posterior margin, and globose, prominent eyes, situated 

 laterally rather far back; surface smooth and shining, with irregular, excess- 

 ively fine transverse combings. Antennae reaching nearly to the middle of 

 the thorax, rather stout, not increasing in size much beyond tha middle, but 

 with the usual contrasted slendeniess at the base, the joints of the apical 

 half only a little broader than long, the apical joints subrotund. Thorax 

 subquadi-ate, much shorter and scarcely broader than the head, with gently 

 rounded sides, the angles nearly rectangular, blunt; surface like that of the 

 head. Legs very short, the femora only moderately stout, the tibiae stout, 

 increasing considerably in size toward the apex, with a single, rather slender, 

 interior, apical spine as long as the apical width of the tibia. Elytra scarcely 

 longer than the head, somewhat broader than the thorax, of about equal 

 length and breadth, the surface sparsely and very faintly punctate and with 

 exceedingly brief and sparse pubescence. Abdomen very short., not so long 

 as the thorax and tegmina together, at base as broad as the tegmina, tlie 

 basal half equal, beyond tapering rapidly to a rather blmit point, the sur- 

 face sparsely pubescent, but otherwise smooth except for a feeble, sparse, 

 and coarse punctuation laterally. Whole body piceous. 



This species appears to be most nearly related to the anmilaris group, 

 but is' very different in several points from any of the species belonging to 

 it I have seen, and is larger than all and much larger than most of them. 



Length of body, 6 mm.; of antennae, 1.5 mm.; of hind legs, 2.5 mm.; 

 breadth, 1.75 mm. 



Florissant, Colorado; one specimen, No. 6891. 



