396 NORTH AMERICAN COLEOPTERA—LINELL. vol.xix. 



and fourth equal, slightly incrassate toward apex, S])arsely hairy; 

 fifth to eleventh a little longer, equal, filiform, subopaque, finely pu- 

 bescent. Thorax slightly longer than broad, narrower than the head, 

 strongly constricted at base, much less constricted at ai)ex; sides 

 obtusely angulatc between the constrictions; a deep fovea above the 

 angle; disk with very sparse setigerous punctures. Elytra with coarse, 

 sparse sctigerous punctures, subseriately arranged; apices separately 

 rounded. Ventral surface and femora with sparse, minute, setigerous 

 punctures; tibia* and tarsi with denser hairs. Length, 4 mm. 



Mdle. — Thorax immaculate; abdomen blackish at base; fifth ventral 

 segment with a semicircular emargination. 



Female. — Thorax with a transverse black spot on disk; abdomen 

 imnuiculate; second segment very broadly emarginate, semiciicularly 

 excavate, excavation tilled up with a dense brush of yellow, coarse 

 hairs; third segment broadly concave, smooth ; fi)urt]i Hat, semicircular, 

 notched at apex; liftli very narrow, triangular, obtuse at apex. 



Two examples, male and female, collected by JMr. E. A. Schwarz, 

 June 5, at Brownsville, Texas, on Mozhnia sp((tn}at(i. Mr, Schwarz 

 recognized tliis as an undescribed species and labeled it with the MS. 

 name used above, 



T,fpr.—:so. 20G, IJ,S,N,M. 



TETRANODUS, new genus. 



Antenna' with Joints third to sixth strongly iiu-rassate and clavate; 

 eyes coarsely granulate. In other generic characters it agrees with 

 Euderccs of Lecontc. 



Type. — Teiranoihis HlrcicoUiH^ new sjtecies. 



TETRANODUS NIVEICOLLIS, new species. 



Kufous. a[)i('al half of elytra, a spot behind the humeri, abdomen 

 and tibia' black, sparsely covered with whitish, fiying hairs. Head 

 very coarsely and densely punctate, genai rugose. Eyes snmll, coarsely 

 granulate, deeply emarginate, rounded in front, gradually attenuated 

 behind the base of the antenna'. Tliese latter somewhat longer than the 

 bod}'^, finely pubescent, Il-jomted; first joint moderately stout, slightly 

 arcuate, as long as the fiitli; second Joint small, a little longer than 

 wide; tiiird nearly twice longer than tburth, strongly clavate, rounded 

 at apex; fourth, pyriibrm; lifth and sixth, sul)e(|iial, cacli longer than 

 fourth, oval, i>e(lunculate; last fi\e joints slender, seventh to tenth 

 gradually decreasing in length, eleventh equal to tenth. Thorax more 

 than twice longer than broad, strongly arcuate upward from the base, 

 densely longitudinally strigose; base strongly constricted, with a trans- 

 verse band of dense silvery-white hairs. Elytra, cylindrical in outline, 

 hardly broader than thorax, convex and conjointly rounded at apex; 

 subbasal ridge slight, obtuse; a deep transverse depression at basal 

 third, behind which there is a strictly transverse, strongly elevated 



