298 GEO. H. HORN, M. D. 



O. gracilis n. sp. — Slender, parallel, reddish yellow, suture of elytra and a 

 narrow space at the side bluish black. Vertex vaguely sulcate. Thorax quad- 

 rate, scarcely wider than long, base very little wider than apex, sides feebly arcu- 

 ate, disc convex, coarsely but not densely punctuate. Elytra parallel, not wider 

 at apex, margin finely serrulate, disc with eight rows of punctures separated by 

 three entire costae. Body beneath pale. Legs pale, tarsi piceous. Antennae 

 piceous. Length .14 inch; 3.5 millim. 



This species has more nearly the form of Charistena. The colors re- 

 call those of dorsalis. 



One specimen, Columbus, Texas. 



CHARISTENA Baly. 

 Antennae 11-jointed, first joint stout, oval, second longer, third longer than the 

 second, 4-6 gradually shorter, 7—1 1 distinct, stouter than the others but closely 

 articulated. Head small, front not prominent. Eyes moderate, finely granu- 

 lated. Thorax usually subcylindrical, margin indistinct. Elytra elongate, par- 

 allel, apex rounded, disc tricostate. with eight rows of coarse punctures in pairs. 

 Legs moderate, intermediate tibiae strongly arcuate, the inner apical angle acute, 

 slightly prolonged. Tarsi dilated, densely pubescent beneath, first joint triangu- 

 lar, rather small, second reniform, third deeply bilobed, fourth almost entirely 

 between the lobes of the third, claws feebly curved divergent. 



This genus founded by Dr. Baly, has been suppressed by Gemminger & 

 Harold in their Catalogus into Chalepm (Anoplitis, Odontota) without, 

 it seems to me, any valid Treason, the characters on which it is based 

 being of at least equal value to any of those on which the other genera 

 of this group are separated. 



Our species are as follows : 

 Body above unieolorous, bluish or black. 



Femora feebly serrulate, third joint of antennae not elongate nigrita. 



Femora distinctly serrulate, third joint of antennae longer than second, 



perspicua. 

 Body above bicolored. Thorax red, with base and apex black. 



Thorax longer than wide ...Ariadne. 



Thorax transverse L.ecoutei. 



Cli. nigrita Oliv.— Moderately elongate, feebly shining, subopaque, black, 

 with at most a feeble violaceous lustre. Thorax longer than wide, sides feebly 

 arcuate in front, subparallel behind, surface coarsely and deeply punctured. Ely- 

 tra wider than the thorax, subparallel, apex obtusely rounded, with the margin 

 feebly serrulate, disc feebly depressed, each with three discal costae, and the 

 suture and margin moderately elevated, between the costae two rows of large 

 deep punctures. Abdomen nearly smooth. Legs black. Length .15 inch ; 3.75 

 millim. 



The intermediate femora are very finely serrulate beneath. The third 

 joint of the antennae is not longer than the second. 



This species is widely distributed over the Atlantic region. 



Cll. perspicua n. sp.— Moderately elongate, shining, black, upper surface 

 with verv distinct bluish lustre Thorax longer than wide, sides very feebly arcu- 



