Goleopterological Notices, V. 42 c^ 



rior tarsi slender, very nearly as long as the tibiae ; fourth joint shorter than 

 the third, first three somewhat elongate, first four together much longer than 

 the fifth. Length 2.75 mm. ; width 0.75 mm. 



Michigan. 



The single specimen is a male and has the anterior tarsi very 

 feebly dilated ; the sixth ventral is broadly, feebly arcuate at apex. 

 This species closely resembles longulum., but differs in its much 

 shorter and more densely punctate elytra, smaller and less incras- 

 sate antennas, in the absence of anastomosing fine lines on the 

 shorter pronotum, and, radically, in the structure of the posterior 

 tarsi, which in longulum have the first four joints short, thick, 

 oblique, equal and together rather shorter than the fifth. 



O. capito n. sp. — Elongate, parallel, feebly convex, polished, black ; 

 antennse, legs and elytra paler, castaneous ; pronotum piceous-black ; setse 

 extremely minute, sparse and scarcely discoverable, on the abdomen longer 

 and distinct but sparse above and beneath, the venter shining. Head large, 

 not as long as wide, much longer and only slightly narrower than the protlio- 

 rax, finely, sparsely punctate, scarcely perceptibly biimpressed between the 

 antennse; eyes feebly convex; tempora subparallel, straight, nearly as long 

 and prominent as the eye ; base transverse and strongly constricted, the ocelli 

 on the edge of the constriction, very feeble, separated by barely one-third of 

 the width ; antennse stout, feebly incrassate, as long as the head and protho- 

 rax, third joint rather longer than wide, constricted and strongly compressed 

 toward base. Prothorax two-thirds wider than long, widest before the middle ; 

 Sides feebly convergent and just perceptibly sinuate toward base ; disk scarcely 

 visibly flattened in the position of the usual impressions, evenly convex, finely, 

 sparsely punctate. Ehjtra about as long as wide, a little longer than the head 

 and prothorax, very slightly wider than the latter, strongly, broadly impressed 

 along the elevated suture, finely, very sparsely punctate, the punctures feebly 

 lineate in arrangement toward the middle of each. Abdomen a little narrower 

 and rather shorter than the elytra, minutely sparsely and indistinctly punc- 

 tate, shining, just visibly alutaceous. Legs short ; posterior tarsi very long 

 and slender, as long as the tibise, the first three joints elongate, oblique at 

 apex, second nearly twice as long as the first, two to four decreasing rapidly 

 in length, first four together much longer than the fifth. Length 3.0 mm. ; 

 width 0.9 mm. 



Wisconsin. 



Allied to lacustre, having nearly the same peculiar structure of 

 the tarsi and also similar in the form of the body and oral organs. 

 It differs notably in the larger head, longer, stouter antennge with 

 compressed third joint, more approximate ocelli, longer tempora, 

 longer elytra and much sparser punctuation throughout. The 

 single specimen is a male, having the sixth ventral feebly arcuate 



