AGEIOTES. — GLTPHONYX. 533 



rougher at the base. Beneath closely, finely punctate. Hind coxal plates slightly widened in their 

 inner third. 

 Length 5|-7, breadth lg-2-J millim. 



Eah. Mexico {coll. Janson, ex Laferte), Capulalpam and Yolos (Salle). 



Ten specimens, probably including both sexes ; females only identified. This 

 obscure species may be known from most of the allied forms by the third joint of the 

 antennae being distinctly shorter than the second. From A. mixtus it may be separated 

 by its more parallel shape, the slightly shorter third antennal joint, and the more 

 rugose elytral interstices. From A. cinereiventris, with which it agrees in general 

 shape, the present insect differs in the more densely and less coarsely punctured thorax, 

 with more produced hind angles, and the rather shorter third antennal joint. The 

 punctuation of the thorax is less dense than in A. quadraticollis. 



39. Agriotes angUStatUS. (Tab. XXIII. figg. 22 ; 22 a, antenna.) 



Rather short, narrow, parallel, moderately convex, shining ; pale brown, the basal joint of the antennae 

 testaceous, the legs obscure testaceous ; sparsely clothed with fine yellowish-cinereous pubescence. 

 Head densely, rugosely punctured, feebly sulcate down the middle ; antennas short, not reaching the hind 

 angles of the prothorax, joints 2 and 4 subequal in length, 3 distinctly shorter. Prothorax about as long 

 as broad, subcylindrical, rounded at the sides in front; the hind angles moderately long, straight, and 

 acute, not carinate ; the surface thickly, coarsely punctate, canaliculate behind ; the base very feebly 

 incised on either side ; the marginal carina distinct at the base only, completely obliterated anteriorly. 

 Elytra two and two-thirds longer than the prothorax, and of the same width, parallel to the middle and 

 narrowing thence to the apex, the apices conjointly rounded ; punctate-striate, the interstices slightly 

 convex on the disc, flat at the sides, and thickly punctured. Beneath closely and finely, the presternum 

 and propleurce coarsely, punctate. Legs comparatively short ; the basal joint of the hind tarsi about 

 as long as the second and third united. Hind coxal plates scarcely widened inwards. 



Length 5|, breadth 13- millim. 



Rah. Mexico, Jalapa (Edge). 



One specimen, probably a female. This small species is not very closely allied to 

 any of the other Central-American members of the genus. It is parallel in shape and 

 very sparsely pubescent, with comparatively short legs, the hind angles of the thorax 

 straight, and the third antennal joint considerably shorter than the second or fourth. 

 From A. pauxillus it may be known by its narrower shape, the much more coarsely 

 punctured thorax, the hind angles of which are less produced, the smoother and more 

 convex elytral interstices, &c. 



Group ADRASTINI. 



GLYPHONYX. 



Glyphonyx, Candeze, Monogr. Elat. iv. p. 451 (1863). 



This is one of the best-defined genera amongst the Elateridee. The described species 

 — forty in number, sixteen of which are American — are spread over the warmer 

 regions of both hemispheres. It is very well represented in Central America, whence 

 we have received upwards of 400 specimens, belonging to twenty-three species, all but 



