20(j GEO. H. HORN, M. D. 



This species resembles some of the smaller forms of lomatm^^ but it 

 has more sparsely punctured elytra, the abdomen more coarsely punctured, 

 antennae shorter and stouter, and thorax more narrowed in front. 



Occurs in Canada, Lake Superior region. 



1». brnnnens Grav. — Piceous or brownish, rather short; antennfe scarcely as 

 long as the head and thorax, brownish, basal joint pale, joints 4-10 not longer than 

 wide, the outer ones quite transverse ; head sub-quadrate in both sexes, not nar- 

 rowed behind the eyes, the hind angles not punctulate; thorax very little wider 

 than the head, longer than wide, slightly narrowed in front, the sides slightly 

 sinuate, dorsal punctures large and equidistant; elytra very little wider than the 

 thorax, conjointly a little wider than long, moderately densely punctate, shining, 

 sparsely pubescent; abdomen very finely and moderately densely punctulate: 

 beneath more coarsely punctured Ihan above, the punctures coarser, margins of 

 segments above and beneath paler; legs testaceous. Length .20 inch ; 5 mm. 



Jkfa/e. — Anterior tarsi moderately dilated; last ventral segment with a large 

 oval eniargination. 



Female. — Anterior tarsi slightly dilated : last ventral entire. 

 This species is readily known among the brownish forms by the rela- 

 tively larger and broader head, 'i he punctuation of the abdomen is 

 also much finer, and resembles that of canrhnif!. The last ventral of 

 the male has a relatively larger eniargination than in any species of the 

 series. 



Occurs from Canada to Texas, and westward to Nebraska. 



Anterior tarsi of both sexes filiform, not at all dilated. Dorsal punc- 

 tures of variable number. 



These few words define the series here aggregated. The slender tarsi 

 are perfectly characteristic of and peculiar to this series. It is true that 

 in some species of the preceding groups the tarsi of the females are in 

 some few cases very narrow, but there is withal some dilatation and a 

 decided diflference of vestiture. The under side of the front tarsi of tlie 

 species of the present series is rather spinous, the hairs are short and 

 stifi" while in the preceding groups the vestiture is decidedly hairy and 

 silken. 



The dorsal punctures of the thorax in their varying number epitomize 

 the three preceding groups, and add another series, which approaches the 

 next group. 



The sexual characters are remarkable in two ways. In by far the 

 larger number of species the male characters are much more feebly in- 

 dicated than in the preceding series ; this is remarkable, as we would be 

 inclined to expect that inasmuch as the tarsal sexual characters are ab- 



