DESCRIPTION OF NEW SPECIES 171 



in the sexes, and modified fifth ventral in the male and cinereous 

 pubescence, gives a facies notably different from the other species 

 described in the present paper and also those previously described by 

 Col. Casey. 



Elegantulus is apparently related to interruptus Lee. According to 

 Casey, in interruptus the dark pubescence of the elytra is arranged in spots, 

 and he distinctly states that the interstitial spaces of the head and 

 pronotum are polished and without reticulation. In interruptus the fifth 

 ventral segment in the male is strongly sinuato-truncate at apex, flattened 

 on the disk and clothed with long erect and bristling hairs, which become 

 black in apical half of the segment. In elegantulus the hairs are not very 

 bristly, although rather long and brownish to black in color ; the apex of 

 the fifth ventral in the male is distinctly emarginate, with the lateral angles 

 quite prominent. 



Interruptus is distributed from Nebraska to California, where it does 

 not descend the western slope of the Sierras in California, according to 

 Col. Casey. 



Listrus fulvipilosus, new species. Form subparallel to elongate-oval 

 and convex. Color black, with a feeble bluish metallic lustre and rather 

 shining ; antennae more or less rufo-piceous ; tibiae dark piceous, tarsi 

 rufous to rufo-piceous. 



Pubescence rather short, sparse and somewhat coarse, for the greater 

 part fulvous in color, varying in some specimens to plumbeo-cinereous. 

 The darker hairs are arranged in an obscure elytral pattern as follows : 

 A small or moderate humeral and a parascutellar macula on each elytron ; 

 a post-basal at middle of each ; a narrow zig-zag fascia at middle, which 

 may be dissolved into a transverse row of narrow irregular maculae ; 

 subapical transverse row of more or less distinct maculae, and one on each 

 elytron at apex. In some specimens the markings are quite distinct when 

 viewed longitudinally from behind. Pronotal central figure indistinct, or 

 evidently constricted at middle with the lobes divided longitudinally by 

 a median line of pale hairs ; lateral vittae more or less dissolved into two 

 maculae. Elytral pattern similar to that observed in niveicanthus and 

 its subspecies tincticornis. Hairs of the under surface of the body rather 

 long. 



Head about as wide as long, quite strongly and broadly bi-impressed 

 between the eyes and antennae, impressions separated by a feeble median 

 convexity that is more or less subglabrous toward the epistomal base, the 

 latter more or less transversely rugulose ; surface rather coarsely and 

 densely indentato-punctate, slightly strigose against the eyes. Antennae 

 rather slender and moderately dissimilar in the sexes, sometimes pale in 

 color and apparently extending to the pronotal base. 



