536 SERRICOKNTA. 



d". The lateral and inferior marginal carinae of the prothorax more approxi- 

 mate, the inferior carina feebly sinuate behind ; the lateral carina about 

 reaching the middle, or to a little beyond it. 



g m . Elytra (except in vars.) fasciate : body testaceous cruciellus. 



h u . Elytra not fasciate. 



k*. Epipleurae sharply angulate : body varying in colour from piceous to 



testaceous teapensis. 



P. Epipleurae feebly angulate : body black or piceous, the elytra some- 

 times brown. 

 j 5 . Elytra very gradually narrowing from the basal third : length 3^— 



4^ millim parallelus. v 



k 5 . Elytra rapidly narrowing from the basal third : length 2f— 3 millim. minimus. \s 



1. Grlyphonyx dugesi. 



Glyphonyx dugesi, Cand. Elat. Nouv. v. p. 66 (1893) \ 



Hob. Mexico, Durango city and Villa Lerdo in Durango (Hoge), Guanajuato 

 (Duges x ), Tepetlapa in Guerrero (H. H. Smith), Playa Vicente {Salle). 



Of this species, the type of which has been communicated by Dr. Candeze, we have 

 received about a dozen specimens. It may be known by its comparatively large size, 

 and the subquadrate, closely and coarsely punctured thorax. The antennse have their 

 second and third joints equal in length. The front is obtusely angulate and sharply 

 margined. The thorax has a well-defined lateral carina extending almost to the apex ; 

 the inferior marginal carina is moderately sinuous behind ; the basal plicae are distinct, 

 the basal incisures being very shallow. The hind coxal plates are rather broadly and 

 abruptly dilated in their inner third. The prosternal process is long and acute, 

 gradually narrowing behind, margined to near the tip. 



2. Grlyphonyx quadraticollis. 



? Elater inscius, Say, Trans. Am. Phil. Soc. vi. p. 184 1 ; Complete Writings, ii. p. 622 2 . 

 ? Glyphonyx recticollis, var. a, Cand. Monogr. Elat. iv. p. 454 3 . 



Elongate, rather convex, shining ; pitchy-black, piceous, or reddish-brown, the anterior and hind angles of 

 the prothorax usually ferruginous, the suture usually infuscate in light-coloured specimens, the legs and 

 antennas testaceous; thickly clothed with yellowish-cinereous pubescence. Head closely and coarsely 

 punctured; front with the strongly reflexed margins meeting at an obtuse angle in the centre ; antennas 

 extending to a little beyond the hind angles of the prothorax in the male, slightly shorter in the female, 

 joints 2 and 3 subequal in length. Prothorax subquadrate, a little broader than long, the sides parallel 

 from the base almost to the apex in the male, more rounded anteriorly in the female ; the hind angles 

 acutely produced, not or feebly divergent ; the lateral carina sharply defined and extending almost to the 

 apex, the inferior marginal carina widely separated from it anteriorly and strongly sinuate behind ; the 

 surface somewhat thickly and rather coarsely punctured, with a narrow space down the middle impunctate ; 

 the basal plicae well-defined. Elytra about two and four-fifths longer than the prothorax, and a little 

 wider than it, narrowing from the basal third, somewhat pointed behind ; punctate-striate, the interstices 

 feebly convex and rugulosely punctured ; epipleurae angulate opposite the hind coxae. Prosternum and 

 propleurse with scattered coarsish punctures ; metasternum. and abdomen thickly, finely punctate, the sides 



