408 Trans. Acad. Sci. of St. Louis. 



and impuQctate. The sculpture of the head also seems to be 

 confiaed to the genus, there being on the interspaces of the 

 under surface a system of close-set but unevenly distributed 

 exceedingly minute nude punctules, visible toward the su- 

 tures only and sometimes almost obsolete ; on the upper sur- 

 face these densely aggregated punctules, which are entirely 

 distinct from the ordinarj' punctures, form two very large 

 subopaque patches involving the entire anterior half and 

 separated by a smooth polished line. The antennae are very 

 similar to those of Hahrolinus and the maxillary palpi are of 

 the same type as in that genus and the one following, except 

 that here and in LitJtocJiarodes the third joint is more de- 

 veloped, the oblique fourth joint being relativelj'' much 

 shorter. The abdomen in NemaioUnus is not minutely retic- 

 ulate but is unusually punctate. The head is completely 

 unmodified and evenly convex behind the eyes throughout, in 

 which character it differs somewhat from Lithocharodes. 

 JV^ematolinus is evidently closely allied to Somoleptus Shp., of 

 the neotropics, but appears to differ in the system of cephalic 

 and elj'^tral sculpture, and, as the rather numerous species of 

 Somoleptus described by Dr. Sharp will ultimately prove, in 

 all probability, to be assignable to several genera, I leave 

 longicollis Lee, in the special genus here proposed for it. 

 The tibiae in JSTematolinun are certainly spinulose to some 

 extent, whereas in Somoleptus the legs are said to be slender 

 and destitute of spinules. Our single species is of wide 

 northern range, apparently not occurring in the subtropical 

 parts of the country and may be characterized as follows: — 



Very elender, moderately convex, parallel, polished, pale piceous, the 

 head somewhat darker, the legs and antennae pale; head elongate, sub- 

 parallel or feebly enlarged toward base, with the angles very broadly 

 rounded, the punctures fine but strong and rather close-set; antennae 

 mach longer than the head, the basal joint evidently more than half as 

 long as the remainder; prothorax one -half to three-fifttis longer than 

 wide, just visibly narrower than the head, the sides almost evenly 

 arcuate from the neck to behind the middle, then very feebly converging 

 and straight to the moderately rounded basal angles, the punctures fine 

 but deeply impressed and close-set; elytra slightly longer than wide, 

 much shorter but evidently wider than the prothorax, minutely, evenly 

 and somewhat closely punctate, the punctures arranged without order; 



