Coleoplerological Notices^ VI. 639 



rounded to the neck, one-half as long as the eye and much less prominent; an- 

 tennte about as long as the head and prothorax, slender and filiform, the last 

 three joints much stouter, eighth much shorter than the seventh, second and 

 third equal in length, the former slightly the thicker. Prothorax one-third 

 to two-fifths longer than wide, subequal in width to the head, widest at 

 apical two-fifths, finely, densely punctate and rugose, the surface even; 

 basal margin strongly marked at the sides. Elytra one-third to nearly one-half 

 wider than the prothorax, nearly two and one-half times longer than wide, 

 slightly cuneiform, rather narrowly and conjointly rounded at tip; humeri 

 strongly, evenly rounded to the prothorax ; disk striato-punctate, the suture 

 strongly margined. Under surface minutely, densely punctulate, very finely, 

 densely pubescent. Legs thick; basal joint of the hind tarsi quite distinctly 

 longer than the remainder. Length 3.9-4.9 mm. ; width 0.8-1.2 mm. 



Texas (Austin). 



The male has the fifth segment unimpressed, a little longer than 

 the fourth and transversely truncate at apex, the middle of the 

 truncature slightly produced in a minute rounded projection. In 

 the female the fifth segment is much longer, strongly narrowed 

 from base to apex, the rounded apex feebl}^ sinuate in the mid- 

 dle, and the surface broadly impressed ; the second ventral has at 

 each side a strong transverse excavation along the basal margin 

 which is wanting in the male. The male intromittent organ is 

 ver}' intricate, having two thick complex lateral lobes, with ex- 

 ternal pubescent appendages, and a very slender central organ, 

 till of equal length ; it is therefore almost of the same general 

 type as in Pedilus. 



I took a good series of this interesting species in the valley' of 

 the Colorado of Texas, in June. 



Anthicini. 



The components of this extensive and widely distributed tribe 

 a,re active ground beetles of predaceous habits. The various 

 genera have not been considered very pronounced or sharplj^ de- 

 fined hitherto, but the discovery of certain extraordinarily devel- 

 oped and diversified modifications of the mesosternum and its 

 parapleurae, enables me to delimit those which occur within our 

 territories with much confidence. These wonderful structures by 

 some singular chance seem to have thus far escaped observation, 

 although in several cases the}' are so radical as to be obtrusively 

 evident, the edge of the large expanded mesosternal plate, for ex- 

 ample, being occasionally i)rominent from a dorsal point of view 



