AGEIOTES. 531 



of the thorax and elytra, the slightly longer third joint of the antennae, &c. As in 

 A. mixtus, the females differ considerably from the males. 



35. AgrioteS opacicollis. (Tab. XXIII. figg. 21, <? ; 21 a, genitalia.) 



Moderately elongate, narrow, convex, opaque, the elytra slightly shining ; piceous or pitchy-hrown, the 

 prothorax with the hind angles or a triangular patch on either side at the base ferrugineo-testaceous, 

 the abdomen and metasternum sometimes in part ferruginous, the basal joint of the antenna? and the 

 legs testaceous ; the head, prothorax, scutellum, and under surface, and the elytra with the suture to 

 the apex and the sides to about the middle, thickly clothed with yellowish-cinereous pubescence, the 

 prothorax in some specimens with a rhomboidal patch on the disc clothed with brownish hairs, the rest 

 of the elytral pubescence fuscous. Head very densely punctate ; antenna? extending to a little beyond 

 the hind angles of the prothorax in the male, slightly shorter in the female, joints 2 and 3 equal, 

 3 shorter than 4. Prothorax as long as broad, subcylindrical, the sides rounded in front and sinuate 

 behind ; the hind angles long and divergent, not carinate ; the surface very densely and finely punctate 

 throughout, finely canaliculate behind ; the base feebly incised on either side ; the marginal carina 

 indistinct from the middle forwards. Elytra about two and three-fourths the length of the prothorax, 

 slightly rounded at the sides, rapidly narrowing from a little below the base in hoth sexes, somewhat 

 pointed behind ; punctate-striate, the interstices flat and rugulosely punctured. Beneath more shining 

 than above, densely and finely, the prosternum and propleurae more coarsely, punctate. Hind coxal plates 

 slightlv widened in their inner third. 



Var. Eeddish-brown, the base of the head, and a large rhomboidal patch on the disc of the prothorax, black 

 or piceous. 



Length 7-7|, breadth 2-24- millim. ( <$ $ .) 



Hah. Guatemala, Zapote (Champion). 



Twenty-three specimens, three of which appertain to the variety. This species has 

 the thorax so densely punctured as to appear opaque. It is perhaps nearest allied to 

 A. mixtus ; but differs from it in the densely punctured thorax, which is more parallel 

 in the female, the more attenuate elytra in both sexes, &c. The puncturing of the 

 thorax is a little coarser and denser than in A. meocicanus ; the brownish-pubescent 

 rhomboidal mark on the disc is well-defined in some of the typical specimens, as well 

 as in the variety. 



36. Agriotes hirsutus. 



Moderately elongate, rather narrow ( tf ), much broader and more convex ( $ ), slightly shining, black, the legs 

 piceous or pitchy-brown; above somewhat thickly clothed with moderately long, semierect, fuscous or 

 blackish hairs, the under surface with brownish-cinereous, decumbent pubescence. Head densely punc- 

 tured ; antenna? extending to far beyond the hind angles of the prothorax in the male, very short in the 

 female, joints 2 and 3 short, equal, 3 shorter than 4. Prothorax broader than long, more transverse in 

 the female, narrowing from the base in the male, broader anteriorly and more rounded at the sides in the 

 female, the sides converging in front and sinuate behind ; the hind angles long, acute, and divergent, 

 without distinct carina ; the surface densely and somewhat coarsely punctate ; the base feebly incised on 

 either side : the marginal carina distinct towards the base only, completely obliterated anteriorly. Elytra 

 three times the length of the prothorax, narrowing from a little below the base in the male, widest at the 

 middle in the female, somewhat pointed behind ; punctate-striate, the interstices flat in the male, convex 

 in the female, and rugulosely punctured. Beneath, the prosternum and propleurae included, thickly and 

 rather coarsely punctate, the ventral segments more finely and more diffusely punctured. Hind coxal 

 plates a little widened in their inner third. 



Length 7g-9g, breadth 2|-3 millim. ( tf $ .) 



Hab. Mexico, Ciudad in Durango (Edge). 



3Y2 



