COLEOPTERA. 105 



Female. — Sixth segment very broadly and triangularly produced poste- 

 riorly, sometimes nearly evenly rounding. 

 Length 3.0-3.7 mm. 



Michipicoten River, Lake Superior, 7 ; Batohehwauung Bay, Lake 

 Superior, 1 ; Lake Superior, 7 ; Columbus, Texas, 8 ; Topeka, Kan- 

 sas, 1 ; Western States, 2 ; Selma, Alabama, 3 ; Southern States, 1 ; 

 Middle States, 4 ; Marquette, Michigan, 1 \ New Jersey, 2 ; District 

 of Columbia, 2 ; Pennsylvania, 2 ; Long Island, New York, 4; New 

 York, 3 ; Cambridge, Massachusetts, 1 ; Unknown, 13. 



This common and well-marked species seems to vary to a consider- 

 able extent ; the bead is narrower between the eyes, the third joint 

 of the antennae is much longer than the fourth, and the palpi are 

 entirely black in the Texas specimens, and the elytra are seemingly 

 shorter in those from Michigan ;• there also appears to be a slight 

 variation in the relative lengths of the second and third joints of the 

 posterior tarsi. The punctuation does not appreciably vary. There 

 may be two or more distinct species indicated by these characters, 

 but they are so close, and seem to have so many intermediate forms, 

 that I do not feel warranted in describing them. It may be readily 

 recognized by the unusually long second joint of the posterior tarsi. 



I believe this species has been identified as cinerascens Er., by 

 Mr. Fauvel, but, on reading the description of that species, and com- 

 paring it carefully with that of stygicus Say, as just given, I am 

 unwilling at present to make the change. 



S3. S. egeillis Erichs. — Form rather robust. Pubescence exceedingly 

 sparse, short, coarse, semi-erect, flavo-cinereous. Head moderate, twice as 

 wide as long ; interocular surface flat, three times as wide as the eye ; deeply, 

 rather finely, and exceedingly closely punctured ; no trace of sulcations or 

 elevation ; ocular lines meeting at about two and one-half lengths in advance : 

 antennae rather slender, as long as the width of head, piceous-black, paler 

 toward tip, club small, but distinct ; third joint one-third as long again as 

 the fourth, joints three to six uniformly decreasing in length, six and seven 

 sub-equal, joints of club successively increasing in length, eleventh acumi- 

 nate at tip ; maxillary palpi piceous-black. Prothorax robust, widest just 

 before the middle, where it is five-sixths as wide as the head and but slightly 

 narrower than long ; sides thence feebly convergent posteriorly, and just 

 perceptibly sinuate ; anterior margin very slightly longer than the posterior, 

 equally arcuate ; surface evenly convex with a very slight transverse impres- 

 sion just behind the anterior margin ; rather finely, evenly, and exceedingly 

 closely punctured, interspaces just visible as acute ridges, lustreless. Elytra 

 at base slightly wider than the head ; sides slightly divergent posteriorly, 

 feebly and evenly arcuate ; together broadly and very feebly emarginate 

 behind ; suture one-fifth as long again as the pronotum ; surface convex, 



