June, 1907.] SCHAEFFER : NeW ScARAB^IDTE. 67 



rounded. Thorax twice as wide at base as long ; sides broadly rounded, basal and 

 apical angles obtuse ; base and sides margined ; apex nearly as wide as base ; surface 

 moderately coarsely, but not densely punctate. Elytra slightly more than one and a 

 half times as long as wide, not widening behind ; punctuation forming almost regular 

 rows, except the first interval, which is confusedly punctate ; costae almost indistinct 

 and with a row of smaller punctures ; at apex the rows of punctures are feebly im- 

 pressed. Propygidium transversely impressed at apex and coarsely punctate. Pygi- 

 dium coarsely not densely punctate. Labrum broadly arcuate-emarginate. Maxillary 

 palpi elongate-oval. Front tibiae tridentate, the teeth equally separated from each 

 other. Claws cleft, but the lower part very short and obliquely truncate at apex. 

 Length lo-ll mm. 



Brownsville, Texas (Esperanza Ranch). 



This fine species is named after my friend Mr. Gustav Beyer, 

 with whom I collected this and many other interesting species on my 

 second trip to that semi-tropical region. 



The elongate, nearly parallel sided form and the large clypeus 

 distinguish this species. The head, basal margin and suture are gen- 

 erally slightly darker. 



Listrochelus knausii, new species. 



Oblong-oval, pale ferruginous, elytra pruinose. Head densely and very coarsely 

 punctate, the transverse carina on the vertex almost absent ; clypeus transverse, margin 

 reflexed, apex feebly emarginate. Thorax rotundate-angulate at sides ; apical angles 

 acute, basal angles rounded ; apex slightly narrower than base ; side margins serrulate, 

 more strongly at basal half than near front angles, fimbriate with long hairs; surface 

 coarsely, irregularly punctate, more densely near apical margin. Elytra moderately 

 coarsely punctate, punctures not deeply impressed ; sutural cost^e more prominent than 

 the discal, the latter very feeble ; side margins fimbriate. Underside, except abdomen, 

 densely clothed with pale yellowish, fine, long hairs. Length II.5-12 mm. 



Male. — Club of antennce as long as the funicle. Fifth abdominal segment 

 broadly elevated at middle, the elevation more densely punctate than the rest of the 

 segment. Pygidium feebly convex, with very few punctures ; apex rounded. Poste- 

 rior tibire slender, normal ; spurs slender, the inner slightly shorter and rounded at 

 apex ; tarsi as long as the tibi?s. Claws feebly crenate, alike on all the tarsi, with a 

 small median tooth. 



Female. — Antennal club shorter than the funicle. Pygidium feebly convex and 

 very sparsely punctate. Abdomen convex and very obsoletely punctate. Claws 

 feebly crenate alike on all the tarsi with a small median tooth. Hind tarsi shorter than 

 the tibiffi. 



Stockton, Utah. 



This species, which was communicated by Mr. Warren Knaus, 

 after whom it is named, has lost nearly all the characters of the genus, 

 but the facies and the feeble crenation of the claws leave no doubt that 

 it is a Listrochelus. 



