222 Memoirs on the Coleoptera 



The two following species are much narrower, more parallel 

 and less ventricose than arizonica, zuniana or neomexicana, and are 

 of a paler piceous-brown color. They evidently belong to the 

 same group as that represented by Anchomenus mollis Dej., of 

 Alaska, which is erroneously assigned generically, but differ in 

 some respects according to the description of Dejean: 



Pristodactyla binaria n. sp. — Body elongate, parallel, feebly convex, 

 shining, with opaculate and closely micro-reticulate elytra, dark brown 

 in color, the edges slightly pale; under surface and legs rufo-ferruginous; 

 head slightly elongate, with moderately prominent eyes, two-thirds as 

 wide as the pro thorax, the anterior impressions shallow and vague; 

 palpi pale, the fourth joint distinctly longer than the third; antennae 

 uniform pale rufo-ferruginous, moderately slender, about half as long 

 as the body, the third joint distinctly longer than the fourth; prothorax 

 a fifth or sixth wider than long, widest a little before the middle, the 

 sides evenly and moderately rounded, moderately oblique and usually 

 very slightly sinuate posteriorly, the angles broadly rounded, the punc- 

 ture on the edge distinct; base as wide as the apex, margined, transverse 

 medially, becoming strongly and gradually arcuate laterally; apex 

 moderately sinuate, the angles blunt at tip; margins strongly reflexed, 

 broadly so at base, where however they are separated from the fovese, 

 which are elongate and feebly, vaguely impressed and virtually smooth; 

 surface almost smooth, the impressions feeble, the stria fine, impressed, 

 not attaining the base; elytra elongate, oblong-subparallel, with feebly 

 arcuate sides, becoming gradually but little more rounded basally; 

 apex gradually rounded, the sinus obsolete, nearly two-thirds longer 

 than wide and about three-sevenths wider than the prothorax; striae 

 fine, smooth, evidently impressed, the scutellar stria long, the ninth 

 midway between the eighth and the edge; intervals slightly convex, with 

 fine and feeble scattered punctures laterally, the third with two punctures 

 at the second stria, before the middle and near apical fourth; met- 

 episterna rapidly narrowed, not quite twice as long as wide; anterior 

 male tarsi unusually strongly dilated, feebly sulcate medially. Length 

 (cf 9 ) 8.5-9.8 mm.; width 3.3-3.8 mm. S.Arkansas. Five examples. 



I have no reason to doubt the accuracy of the habitat assigned 

 this species, but have no record of the collector or other data con- 

 nected with the specimens. The species from the far north — 

 "prope fines Aquilones," described by LeConte under the name 

 Pristodactyla advena, and conceived by the author to connect 

 Pristodactyla and Pristonychus, I have not seen, but it is evidently 

 of the mollis group and related to binaria and scolopax, here de- 

 scribed ; but it is not piceous in color and in great part dull in lustre, 

 as in the latter two species, but of a shining black; it is 9.7 by 3.5 

 mm. in dimensions and the elytra have two dorsal punctures. 



