Coleopterological Notices, V. 555 



broadly, unevenly at the sides of the pronotum. Head evenly, feebly convex, 

 not at all impressed, finely, sparsely punctulate, the punctures larger and 

 minute inteimingled, distinctly striate along the lateral edges almost to the 

 front. Prothorax not quite twice as wide as long, the sides feebly convergent 

 and nearly straight in basal two-thirds, more rounded and convergent at 

 apex ; marginal stria deep, entire, continuous along the apex. Elytra but 

 little wider than the prothorax, three-fourths longer, the apex two-thirds as 

 wide as the base ; sides broadly, evenly arcuate ; inflexed flanks strongly 

 liistriate ; inner subhumeral represented by a feeble series of uneven punc- 

 tures ; oblique humeral short and very fine ; dorsals coarse, deeply impressed 

 and finely crenulate ; first four entire ; fifth and sutural abbreviated at basal 

 tliird. Propygidium rather coarsely deeply and densely punctate, except 

 near the hind margin ; pygidiura finely but deeply, sparsely and unevenly 

 punctate, also with intermingled minute punctules ; stria attaining the basal 

 angles. Prosternal lobe large, subquadrate, finely, dually punctulate ; inter- 

 coxal part strongly bistriate ; mesosternnm broadly, very feebly sinuate, the 

 marginal stria very broadly, posteriorly angulate. Anterior tibiae strongly 

 bidentate. Length 1.9-2.2 mm. ; width 1.2-1.25 mm. 



Arizona (Benson). 



Three specimens. In tiiis genus there is no true antennal fossa, 

 the antennae being simply protected by the anterior legs when the 

 latter are folded into the large crural excavation toward the sides 

 of the prothorax beneath. 



PAROAIALUS Erichs. 



The species of this genus inhabiting the United States may be 

 outlined as follows : — 



Presternum with two long deep striae ; body larger, strongly depressed. 



aequalis Say. 

 Prosternum not striate, except sometimes feebly or partially ; body smaller, 

 narrower and more convex. 

 Elj'tra without trace of sutural stria. 



Elytra with two deeply impressed oblique striae sublaterally at base. 



Iiistriatus Kr. 



Elytra with the oblique striae very feeble or obsolete. 



Form cylindrical, short, resembling Teretrius americamis ; prosternum 



flattened teres Lee. 



- Form oblong oval. 



Punctures small, much finer than in difficilis de1>ilis Lee. 



Punctures strong but sparse, fully as large as in difficilis but more 



distant niailClIS n. sp. 



Elytra with a distinct abbreviated sutural stria. 



Prosternum with two long feeble and interrupted striae ; pygidium merely 

 with a few fine vermiculate lines in the male ; form oval, more convex, 



