Coleopterological Notices. 339 



some slender perennial plants growing near the banks of the Rio 

 Grande, represents a species which cannot well be compared with 

 any other here described. It is narrower and much more sparsely 

 punctate than convexicolle, and moreover differs from both that 

 species and cylindricum in the much broader elytral base, with 

 exposed- humeri, and in its shining head; in the two species -men- 

 tioned the head is more transverse, and is rendered very dull by a 

 peculiar system of excessively minute but strong granuliform reti- 

 culations ; in politum the reticulations are flat and much larger. 

 The metasternum in politum is slightly longer than in convexicolle. 



■£•£ 

 Ell. longipeiine n. sp. — Oblong-elongate, parallel, moderately convex, 

 piceous-black ; under surface anteriorly, legs and antennae dark rufous ; 

 integuments subalutaceous. Head short and very transverse, broadly, arcu- 

 ately impressed anteriorly, the sides before the eyes rounded and broadly, 

 feebly reflexed, the epistoma transversely, feebly tumid and very broadly 

 arcuate between the emarginations which are broadly angulate and feeble ; 

 surface finely, densely punctate, the punctures'shallow, annular and scabrous ; 

 eyes rather large, feebly prominent, the upper fold very short ; antennae 

 slender, the third joint very elongate. Prothorax fully twice as wide as long, 

 the apex slightly narrower than the base, evenly, rather strongly emarginate 

 in circular arc, the angles acute and distinctly prominent ; base transverse, 

 with the usual two feeble approximate sinuations ; basal angles right, slightly 

 everted and distinctly prominent ; sides very distinctly, rather evenly arcuate ; 

 disk distinctly wider behind the middle than at base, rather finely but dis- 

 tinctly, very densely punctate, without trace of median line, the punctures 

 scabrous, extremely dense and crowded laterally, the marginal bead very 

 acute and strongly elevated. Ehjtra about one-fourth wider than the protho- 

 rax and about five times as long, wider across the humeri than any portion of 

 the prothorax, the humeri narrowly rounded ; apex obtusely rounded ; sides 

 straight and parallel ; disk with distant and indistinct series of small feeble 

 punctures, the series broadly, feebly and unevenly impressed ; intervals very 

 minutely, sparsely punctate. Abdomen feebly, the metasternum very finely 

 and sparsely punctate, the latter polished and nearly twice as long as the first 

 ventral segment. Legs long and slender. Length 9.2 mm. ; width 3.8 mm. 



New Mexico. 



This well-marked species is the largest of the genus yet described, 

 and is very distinct in its long elytra, short prothorax, long meta- 

 sternum and several other characters. The anterior tibiae are 

 strongly, unevenly serrato-crenulate along the outer edge, and the 

 disk of the pronotum is very feebly impressed and more sparsely 

 punctate just before the scutellum. 



Annals N. Y. Acad. Sci., V, Nov. 1890.— 23 



