Coleopterological Notices. 85 



width. Elytra parallel, scarcely one-fifth wider than the prothorax and fully 

 twice as long; humeri right and very narrowly rounded; surface feehly 

 convex, extremely densely and finely punctato-granulose, the short appressed 

 pubescence correspondingly dense, and the longer erect hairs somewhat dense, 

 very small and not easily seen. Abdomen very slightly narrower than the 

 elytra and subequal in length, feehly narrowed toward tip ; border moderate 

 in width and depth ; surface feebly convex, more coarsely punctato-reticulate 

 and rather more shining, the pubescence coarser, as usual. Length 0.8 mm. 



California (Fort Yuma 3). 



This species may be distinguished by its slender form, piceous- 

 black antennas, short prothorax, and long elytra. 



T. pygmaeus n. sp. — Rather slender and depressed, black throughout; 

 legs and antennae same ; integuments rather dull. Head fully as long as wide 

 and distinctly longer than the prothorax, very feebly, evenly convex, very 

 minutely, densely punctate ; tuberculations very feeble ; transverse epistomal 

 suture very distinct ; eyes large, feebly convex, the tempora nearly as promi- 

 nent, very feebly arcuate and nearly two-thirds as long as the eye ; antennje 

 just visibly longer than the head and prothorax, feebly clavate, second joint 

 slightly less than twice as long as wide, nearly as long as the next two 

 together, the third very much longer than the fourth which is slightly trans- 

 verse, subequal to the sixth, the fifth larger and very slightly wider than 

 long, eleventh one-half longer than wide, ovoidal, abruptly pointed. Pro- 

 thorax slightly wider than the head, very slightly less than twice as wide as 

 long ; sides parallel and strongly arcuate ; basal angles very broadly rounded, 

 the base feebly arcuate ; apex truncate, the apical angles slightly obtuse and 

 scarcely at all rounded, scarcely perceptibly advanced ; disk broadly, feebly 

 convex, extremely minutely and densely punctate throughout, and broadly 

 strongly impressed on each side at the base, the Impressions trisecting the 

 widtli. Ehjtra slightly wider than the prothorax, and about twice as long, 

 parallel, very minutely, densely punctate and pubescent, the longer suberect 

 hairs very short, somewhat dense and not very distinct. Abdomen slightly 

 narrower than the elytra, slightly narrowed toward tip, sliort; border rather 

 thick, flat and shallow, the surface transversely convex, more coarsely, 

 sparsely punctate, and slightly shining, especially the sixth segment. Leys 

 moderate. Length 1.0 mm. 



Nevada (Reno 1). 



The abdomen with its somewhat convex surface, and very shallow 

 and rather wide border, contrasts greatly with the same part as 

 seen in sonomx, but the structure of this part seems to vary con- 

 siderably within specific limits, even in the mature state. 



The three species last described are more closely allied than usual, 

 and, although easily distinguishable in nature by peculiarities of 



