COLEOPTERA. 191 



35. A. Hlll>l>ai*«li n. sp. — Form rather robust. Pubescence very fine, 

 short, rather sparse, dark plumbeous, scarcely visible ; entire surface very 

 highly polished. Head small, twice as wide as long; interocular surface 

 twice as wide as the eye, flat : sulcations broadly rounded, narrow, and feeble ; 

 intermediate surface narrow, acutely convex, very narrowly impunctate 

 along the middle ; punctures rather coarse, deeply impressed, round, nearly 

 evenly distributed, distant by nearly their own widths ; interspaces convex ; 

 ocular lines meeting at nearly two lengths in advance ; labrura small ; 

 antennae very slightly longer than the width of head, translucent, dark 

 piceo-testaceous toward base, becoming black toward tip, club rather slen- 

 der ; third joint one-half longer than the fourth, joints of club increasing 

 rapidly in length, sparingly pubescent ; maxillary palpi long and slender, 

 first joint rather dark piceo-testaceous, remainder dark piceous-brown, third 

 joint clothed densely with cinereous, setiform pubescence. Prothorax widest 

 at the middle, where it is scarcely narrower than long; sides thence very 

 feebly convergent and straight anteriorly, slightly more convergent and just 

 visibly sinuate posteriorly ; anterior margin slightly longer than the poste- 

 rior, more strongly arcuate, posterior rather strongly arcuate ; surface nearly 

 evenly convex ; punctures rather small, evenly distributed, round, rather 

 deeply impressed, distant generally by nearly their own widths. Elytra at 

 base very slightly wider than the head; sides nearly parallel, much longer 

 than the width at base, almost straight toward the humeral angles, strongly 

 arcuate toward the apices : outer apical angles very acute and prominent ; 

 together broadly, roundly, and rather feebly emarginate behind ; suture 

 one-third longer than the pronotum ; surface strongly convex, very feebly 

 impressed on the suture toward the base ; punctures round, very deeply 

 impressed, nearly evenly distributed, distant by much less than their own 

 widths; interspaces very convex. Sides of the abdomen slightly inwardly 

 eurvate; first segment slightly narrower than the contiguous elytra, third 

 and fourth equal in width, narrower than the first, all strongly constricted 

 at base, cylindrical ; transverse carinae not cusped ; surface very strongly, 

 closely, and evenly punctate ; punctures nearly as large as those of the 

 elytra; interspaces "about one-half as wide as the punctures, very convex. 

 Legs rather short and robust, very dark fuscous throughout in color ; first 

 joint of the posterior tarsi two-thirds as long as the fifth, much shorter than 

 the second and third together; lobes of fourth joints very long and narrow. 



Male. — Fifth ventral segment very narrowly emarginate in the middle of 

 its posterior edge, emargination more acutely rounded at the bottom than at 

 the sides, minute, about five times as wide as deep ; sixth segment narrowly 

 and very deeply incised at the apex, incisure nearly twice as deep as wide, 

 sides straight, exterior angles very feebly rounded ; seventh segment broadly, 

 roundly, and strongly emarginate at tip, edges of emargination undulated at 

 the bottom, lateral teeth strong, broad at base, straight. 



Female. — Unknown. 



Length 2.8 mm. 



Batchehwauung Bay, Lake Superior, 1. 



The distinguishing features of this very distinct species lie in the 

 very robust prothorax, proportionally long elytra, antennae black in 



