CARABINE. 19 



slender cylindrical joints; the thorax is unusually quadrate, tapering but 

 little posteriorly (though this may he only in appearance, through the par- 

 tially lateral manner of its preservation), with well-rounded angles and 

 truncate base and apex; there is a slight median impressed line and the 

 surface is very delicately scabrous, with a slight tendency to a transverse 

 arrangement of the roughnesses. Elytra uniformly striate throughout, the 

 stria* apparently most delicately and faintly punctulate, though this is 

 hard to determine, as the specimen is preserved in reverse and the striae 

 appear as ridges. 



Length of body, 5 mm.; width of elytra, 2 mm. 



Florissant, Colorado; one specimen, No. 11790. 



BEMBIDIUM TUMULORUM sp. nov. 

 PI. I. %. _>. 



Of the same size as the last (B. oMtictum), but differing from it mark- 

 edly in the form and structure of the thorax, which is considerably broader 

 than the head, broadest in the middle of the anterior half, and rapidly taper- 

 ing posteriorly to near the tip, when it tapers less rapidly, being thus sub- 

 cordate. There is a median impressed line and the surface is longitudinally 

 and very delicately corrugate in wavy lines. The rest of the body is very 

 obscurely sculptured, but the elytra are apparently uniformly striate, at 

 least at base, and distinctly punctate. 



Length of body, 5 mm.; width of elytra, 2 mm. 



Florissant, Colorado; one specimen, No. 1.601, Princeton College col- 

 lection. 



PATROBUS Dejoan. 



This genus has been found fossil only in the Pleistocene. The exist- 

 ing European species, P. t:rcavatus Payk , has been recognized in France 

 and Bavaria, and a couple of extinct species have occurred in Galicia and 

 Canada. The present distribution of the genus is in the boreal portion of 

 the north temperate zone. 



PATROBUS GELATUS. 



., Tert. lus. N. A., 530, pi. 1, fig. 8 (1890); Coutr. Canad. 

 Palseont., II, 53 (181)2). 



Clay beds of Scarboro, Ontario. 



