340 iPROCEEDINGS OF THE NATIONAL MXTSEUM vol.99 



AC»LA.EODERA OAXACAE, new species 



Narrowly elongate, subcylindrical, strongly convex above, broadly 

 rounded in front, strongly narrowed behind middle, moderately shin- 

 ing, uniformly black, with a faint coppery or greenish tinge, and each 

 elytron ornamented with a small, triangular, red spot at middle along 

 lateral margin. 



Head nearly flat in front, broadly, shallowly, longitudinally de- 

 pressed between eyes, transversely depressed behind clypeus, coarsely, 

 deeply, densely punctate, rather densely clothed with moderately 

 long, erect, inconspicuous, white hairs; clypeus deeply, triangularly 

 emarginat« in front. Antenna extending to middle of pronotum; 

 segment 1 elongate, as long as following 3 segments united ; segment 

 2 globose ; segments 3 and 4 narrower, slightly longer than wide, and 

 subequal in length to each other ; segments 5-10 somewhat triangular, 

 slightly wider than long; segment 11 round. 



Pronotum one and one-half times as wide as long, narrower at apex 

 than at base, widest at middle ; sides slightly rounded, more strongly 

 anteriorly ; slightly constricted near bases, with the margins narrow, 

 but not visible from above; disk strongly convex, without distinct 

 depressions, vaguely, transversely flattened along anterior margin, and 

 with three indistinct foveae along base; surface densely, coarsely, 

 deeply punctate, the punctures separated at middle but more or less 

 confluent toward sides, rather densely clothed with long, erect, incon- 

 spicuous, white hairs. 



Elytra strongly convex, deeply, transversely depressed along base 

 at middle, at base subequal in width to pronotum at base ; sides con- 

 stricted at basal fourths, then arcuately converging to tips, which are 

 conjointly narrowly rounded; lateral margins coarsely serrate along 

 apical thirds. Surface striately punctate, striae deeply impressed 

 posteriorly, the punctures in the striae large, separated from one 

 another by about their own widths ; interstrial spaces on sutural regions 

 flat and as wide as the strial punctures, wider, slightly convex, and 

 more or less interrupted toward the sides, sparsely, minutely, regu- 

 larly punctate, with a moderately long, fine, semierect, white hair 

 arising from each puncture. 



Abdomen beneath densely, finely punctate, more sparsely punctate 

 on basal sternites, densely clothed with long, fine, erect, white hairs, 

 intervals smooth ; last visible sternite broadly rounded at apex, with- 

 out a subapical carina. Prosternum coarsely, densely punctate at 

 middle, coarsely ocellate-punctate at sides, densely clothed with long, 

 fine, erect, white hairs; anterior margin sinuate, with two distinct, 

 obtusely rounded, strongly produced lobes near middle. 



Length 6.5-8.5 mm., width 2-2.75 mm. 



Type locality. — Tehuantepec, Oaxaca, Mexico. 



