DESCRIPTION OF NEW SPECIES 167 



Solids appears distinct by its dull lustre, sparse maculation, even and 

 rather dense pubescence and even, close elytral punctuation. Closely 

 related to niveicanthus which has a more pronounced maculation. Some- 

 times salicis is almost unicolorous from diminution of the maculae. 



Listrus niveicanthus, new species. Form oblong-oval, slightly robust 

 and moderately convex. Color black, with a feeble aeneous tinge 

 anteriorly; mouth-parts pale; antennae and tarsi rufous; tibiae toward 

 apex more or less rufous. First antennal joint black as usual. 



Pubescence moderately short, rather fine, recumbent, somewhat sparse 

 and plumbeo-cinereous in color ; a tuft of dense snowy-white hairs at 

 anterior canthus of each eye. The areas of dark brown hairs are 

 arranged as follows : Basal maculae more or less obsolete or small when 

 present, the humeral frequently absent when a parascutellar is present on 

 each elytron ; post-basal macula not large but variable in size, tending to 

 extend toward the humeral ; submedian very narrow and zig-zag, often 

 interrupted at suture and middle of each elytron ; subapical usually inter- 

 rupted forming a transverse row of four maculae, sometimes nearly entire 

 or the sutural two may coalesce to form a small rhomboidal macula on 

 the suture; apical maculae obsolete or small and somewhat transverse. 

 Pronotal central figure usually dissolved into four maculae, two anterior 

 and two posterior, which with those from the broken lateral vittae, make 

 a circle of six small maculae; in some instances the constricted figure 

 appears. The pubescence is longer on the under surface of the body, 

 snowy-white and dense on the prosternum and sternal side-pieces, duller 

 in color on the abdomen and not quite as dense. 



Head somewhat transverse, distinctly wider than the pronotal apex, 

 eyes moderately large and prominent ;. front broadly impressed, a small 

 and somewhat glabrous convexity just behind the base of the epistoma ; 

 surface densely indentato-punctate. Antennae moderate in length and 

 nearly similar in the sexes, moderately compressed; second joint oval, a 

 little longer than wide; third equal in length to the second, obconico- 

 cylindrical in form, a little less than twice as long as wide ; fourth and 

 fifth noticeably compressed, fourth slightly elongate and triangular, 

 moderately prominent anteriorly, apical margin oblique; fifth about as 

 wide as the ninth, distinctly wider than the joints between the first and 

 ninth, slightly elongate, about a half longer than wide, angulate anteriorly, 

 apical margin oblique; sixth, seventh and eighth triangular, subequal in 

 length, just a little longer than wide and slightly angulate anteriorly; 

 ninth and tenth triangular, anterior margins moderately arcuate, subequal 

 in width with the eleventh, the latter less than a half longer than wide, 

 oval, slightly narrower at apex. 



