1 62 MEMOIRS ON THE COLEOPTERA 



unusually long, barely a fourth wider than long, parallel, with evenly 

 and moderately rounded sides, the apical angles broadly, the basal 

 very broadly, rounded, the apical sinus rather shallow; base trans- 

 verse, arcuate laterally, the sinuses barely traceable; surface very 

 steeply declivous at the sides to the fine gutter, except basally, where 

 it is unusually widely and abruptly explanate, the foveae very feeble 

 and vague, with a few feeble punctures basally; elytra barely visibly 

 wider than the prothorax and a little more than twice as long, the 

 striae deep, the intervals slightly convex, the punctures of the three 

 series small, the fourth puncture of the inner series at some distance 

 from the stria on both elytra in the type; apical diffused punctures 

 numerous and distinct, the oblique sinus very feeble; middle tibiae 

 (cf ) moderately arcuate and with strong separated inner granules 

 and thick outer spiniform hairs; tarsi as usual. Length (cf ) 7.9 

 mm.; width 3.0 mm. Texas (Austin). A single example taken by 

 the writer longicollis n. sp. 



Form subcylindric but not quite so stout, shining, deep black above, 

 without metallic lustre, except a feeble viridi-aeneous tinge near the 

 hind thoracic angles, which becomes abruptly strong on the marginal 

 interval of the elytra; under surface and epipleura, except basally, 

 black, the legs, median parts of the prosternum and gula feebly 

 rufescent, the anterior parts of the head as in the preceding; antennae 

 pale; head fully two-thirds as wide as the prothorax, the latter two- 

 fifths wider than long, otherwise nearly as in the preceding, except 

 that the surface is very feebly and gradually subexplanate postero- 

 externally, with the foveae still more completely obsolete; elytra 

 equal in width to the prothorax and nearly two and one-half times 

 as long, obtusely ogival at apex, the sinus barely traceable and 

 short ; striae fine but well impressed, 'the three series very even through- 

 out, the punctures small but unusually numerous, about ten in 

 number on the second stria; diffused punctuation at tip very fine 

 and barely evident; middle tibiae (cf) rather feebly arcuate, the 

 inner serrules few in number and widely spaced. Length (cf ) 7.2 

 mm.; width 2.6 mm. Arizona (probably southern). . congruens n. sp. 



13 Closely related to parallelus Hald., black, shining; head smooth, the 

 frontal impressions punctiform; labrum, antennae and palpi fer- 

 ruginous; prothorax slightly shorter than wide, slightly emarginate 

 at apex, the sides rounded, the hind angles obtuse and rounded, 

 the base very feebly bisinuate; surface subconvex, rugose, the margin 

 toward the hind angles feebly explanate, sometimes feebly punctate, 

 the longitudinal stria abbreviated anteriorly, distinct; anterior 

 transverse impression occasionally somewhat distinct, arcuate, the 

 basal wanting; elytra not sinuate at apex, deeply striate, more so 

 toward tip, the scutellar stria long and distinct; intervals moderately 

 convex, with the usual series, the marginal series of foveae widely 

 interrupted; legs piceous-black, the tibiae and tarsi less obscure. 

 Length 6.5 mm.; width 2.5 mm. Rocky Mountains. [Piceous; 

 surface without metallic lustre; legs somewhat paler; antennae 

 testaceous; prothorax equally wide at base and apex, the side margin 



