234 MEMOIRS ON THE COLEOPTERA 



Pelmatellus Bates. 



This is an isolated genus in the Acupalpini, because of the vesti- 

 ture of the anterior and middle tarsi of the male; these are sub- 

 equally and distinctly dilated and the soles are solidly squamose as 

 in the Anisodactylini, to which tribe there is, however, no other 

 suggestion of similarity. In fact the species bear a close resem- 

 blance to several of the genera allied to Bradycellus. The mouth 

 parts are nearly as in Glycerins, but the emargination of the men- 

 turn is much deeper than in Bradycellus, the tooth strongly de- 

 veloped. There is no trace of abdominal sexual characters in the 

 form of surface modifications, and there is no trace of the diffused 

 abdominal punctulation of the two preceding genera. The hind 

 tarsi are slender, with the first three joints decreasing uniformly 

 and not very rapidly in length, the first much shorter than the fifth. 

 Pelmatellus is moderately numerous in species, extending in range 

 as far to the southward as Guatemala; it was held to represent a 

 distinct tribe or subfamily by Bates, but scarcely merits such dis- 

 tinction. The two species in my collection may be known as 

 follows : 



Form oblong, moderately convex, shining, piceous-black above and 

 beneath, the elytra deeper black, the suture and exterior margin 

 faintly pallescent; lustre non-metallic but sometimes faintly greenish; 

 legs pale testaceous; head mode'rate, evidently more than half as 

 wide as the prothorax, impunctate, the eyes moderate, prominent, the 

 oblique foveae distinct; antennae slender, nearly attaining basal 

 fourth of the elytra, fuscous, paler basally; prothorax one-half wider 

 than long, with the sides subevenly rounded, widest just before the 

 middle, apex feebly sinuate, with narrowly rounded angles, narrower 

 than the base, which is finely beaded throughout, transverse medially, 

 slightly arcuate laterally, the angles very obtuse though sharply 

 defined, not rounded; surface evenly convex, smooth, finely reflexed 

 at rhe sides throughout, with a rather strong entire stria, the foveae 

 shallow, oblong, widely impressed and with a few minute punctures; 

 elytra oblong, parallel, with feebly arcuate sides and rapidly very 

 obtuse apex, one-half longer than wide and fully a fourth wider than 

 the prothorax, the sinus rather feeble though evident; striae fine, 

 the scutellar oblique, moderate in length, the intervals flat; discal 

 puncture at two-thirds; marginal line of foveae widely interrupted; 

 hind tarsi three-fourths as long as the tibire. Length (cf 9 ) 5.0-6.0 

 mm., width 2.15-2.5 mm. Arizona and New Mexico (Cloudcroft). 

 Twenty examples. [Bradycellus lucidus Csy. ; Tachycelius turbatus 

 Fall] lucidus Csy. 



Form oblong-oval, moderately convex, very shining, black, the upper 



