CHALCOLEPIDIUS. 277 



Var. The marginal band of scales on the prothorax and elytra white. 

 Chalcolepidius pistorius, Cand. Bull. Soc. Ent. Belg. 1890, p. clxxxiv 4 . 



Bab. Beitish Honduras 4 (coll. Janson), E. Sarstoon (Blancaneaux) ; Guatemala, 

 Panzos, Teleman, Chacoj, and Sinanja in Vera Paz (Champion). 



With a long series of specimens it is not possible to separate C. pistorius from 

 C. rugatus. In freshly emerged examples the whole of the upper surface, including 

 the convex elytral interstices, is densely, uniformly covered with elongate white scales. 

 In typical C. rugatus the marginal stripe is fulvous or luteous, that of the thorax 

 narrowing posteriorly; in our two specimens from Tabasco the marginal stripe is 

 tawny-brown. The scales of the under surface are chocolate-brown. I have seen 

 three males only — two collected by myself in the Polochic Valley, and one by 

 Mr. Gaumer in Yucatan. We figure two examples : a female of the typical form, 

 from Chiacam, and a male of the var. pistorius, from Panzos. 



4. Chalcolepidus eschscholtzi. 



Chalcolepidius eschscholtzii, Chevr. Coll. Mex. Cent. i. fasc. 1, no. 36 l (Jan. 1833) ; Cand. Monogr. 

 Elat. i. p. 279, t. 5. fig. 8 2 ; Revis. Elat. p. 167 3 ; Bull. Soc. Ent. Belg. 1886, p. lxxi \ 



Hal. Mexico 2 , El Chico in Vera Cruz (Lesueur 1 ), Cordova (Salle, Edge), Jalapa 

 (Edge), Atoyac in Vera Cruz (H. H. Smith), Vera Cruz 3 4 . 



This variable species is apparently confined to the Atlantic slope of Mexico ; 

 C. lafargei is probably an extreme variety of it. The marginal stripe in C. eschscholtzi 

 is usually more or less luteous or fulvous, but is sometimes tawny or almost black ; in 

 C. lafargei it is white. The thoracic stripe is less narrowed posteriorly in C. lafargei and 

 extends to the base. The dorsum is entirely clothed with minute metallic scales, which 

 vary greatly in colour. The scales of the under surface are greenish or olivaceous, 

 as in C. bonplandi. We have received many specimens of both C. eschscholtzi and 

 C. lafargei, including four males of the former and two of the latter. 



5. Chalcolepidius limbatus. 



Chalcolepidius limbatus, Eschsch. in Thon's Archir, ii. 1, p. 33 1 ; Er. Zeitschr. fur Ent. iii. p. 80 2 ; 



Cand. Monogr. Elat. i. p. 272 3 ; Revis. Elat. p. 164 4 ; Bull. Soc. Ent. Belg. 1886, p. lxxi 5 . 

 Elater porcatus, Oliv. Ent. ii. no. 31, p. 14, t. 7. fig. 74 6 ; Drury, Exot. Ins. iii. p. 70, t. 47. 



fig.6 7 . 

 Elater striatus, Fabr. Syst. Eleuth. ii. p. 226 8 . 

 Chalcolepidius angustior, Dej. Cat. 3rd edit. p. 100 9 . 



Hob. Mexico 5 9 (coll. Janson, ex Dejean) ; Centeal Ameeica, Bay of Honduras 7 . — 



South Ameeica 4 5 , Colombia 2 3 6 , Venezuela, Guiana 3 8 , Brazil 2 3 5 , Uruguay 4 . 



There is an abraded male example of this species in the Janson collection, from that 



