DESCRIPTION OF NEW SPECIES 151 



Apparently related to Udells Casey, from which it differs in the fourth 

 antennal joint being wider and more prominent anteriorly than the fifth, 

 shorter pubescence and two distinct elytral fasciae; pubescence not dense 

 and coarse, the elytral pattern somewhat resembles that seen in pardalis 

 Casey. 



Listrus simplex, new species. Form parallel to subovate and moder- 

 ately convex. Color black, more or less shining- and with a slight virido- 

 aeneous lustre ; antennae rufo-testaceous throughout, frequently the distal 

 joints are more or less rufo-piceous ; tibiae and tarsi more or less rufous. 



Pubescence short, somewhat sparse and rather less than coarse, 

 cinereous in color, with dark fasciae of brownish-black hairs arranged as 

 follows : A basal that may be narrowly interrupted at the scutellum ; 

 post-basal maculae absent or small at middle of each elytron; submedian 

 fascia rather wide with edges more or less slightly irregular; the sub- 

 apical likewise rather wide, entire or interrupted by a few pale hairs on 

 the suture ; apical maculae small or obsolete. Pronotal maculae apparently 

 more or less different in the sexes ; lateral semilunar vittae more or less 

 evident, sometimes very narrowly separated from the central macula. 



Head about as long as wide, moderately finely punctate, punctures 

 slightly sparse, intervals almost smooth or feebly indentato-rugulose ; 

 front slightly concave, impression broad, with a small median almost 

 glabrous convexity at the epistomal base. Antennae extending to about 

 the pronotal base and quite similar in the sexes, rather stout and some- 

 what incrassate, feebly compressed to about the tenth joint ; second, third 

 and fourth joints subequal in length ; second oval, about as wide as the 

 fifth; third subcylindrical ; fourth feebly angulate anteriorly; fifth sub- 

 triangular, wider than the two preceding and following joints, as wide as 

 the ninth, apical angle prominent anteriorly ; sixth and seventh similar in 

 length and form, the former slightly smaller and obconico-triangular ; 

 eighth oblong-obconic ; ninth slightly wider and almost subquadrate; 

 tenth oblong-triangular and slightly transverse ; eleventh suboblong-oval, 

 about a half longer than wide; joints from the sixth to the eleventh 

 gradually increasing in width ; outer joints rather abundantly set with 

 pale hairs. 



Pronotum a little wider than long, strongly convex from side to side, 

 widest behind the middle ; sides evenly arcuate in basal half, thence feebly 

 arcuate and moderately convergent to apex, serrules small ; base broadly 

 and slightly arcuate, apparently rather briefly and obliquely sinuate 

 within the obtusely rounded basal angles ; apical angles obtusely rounded ; 

 apex broadly and feebly arcuate; disk with moderately small punctures, 

 separated by a distance equal to their diameter in the central area from 



