262 SEEEICOENIA. 



9. Adelocera pectinicornis. (Tab XI. figg. 5, 6 ; 5 a, profile ; 5 b, antenna.) 



c? . Moderately elongate, very convex, black, the base of the elytra and tbe epipleurse ferruginous ; the entire 

 upper surface closely, confusedly, and rather coarsely punctured, thickly covered with coarse, appressed, 

 oblong, acuminate scales, which are brilliantly golden upon the head, scutellum, and prothorax, except 

 for an oval brown patch on the latter, and on the base of the elytra, those on the rest of the elytra being 

 blackish-brown ; the under surface more coarsely punctured than above, sparsely clothed with finer cine- 

 reous acuminate scales ; the legs piceous, the tarsi obscure ferruginous. Antennae nearly reaching the base 

 of the prothorax, very strongly pectinate from the third joint, the latter sharply triangular, each joint thickly 

 fringed on the inner side above and beneath with long flavo-cinereous hairs. Prothorax as long as broad ; 

 the sides feebly arcuate, converging from the middle forwards, sinuate behind ; the hind angles acute, 

 slightly divergent, obliquely carinate within ; the disc strongly transversely convex, abruptly declivous on 

 either side behind, and canaliculate from the base nearly to the apex. Scutellum declivous, vertical and 

 acute behind, the posterior half concave. Elytra rather more than twice the length of the prothorax, 

 parallel at the base and then somewhat rapidly narrowing to the apex, flattened on the disc, and with 

 the suture swollen in front and raised considerably above the scutellum. Prosternum very broad 

 and parallel, obliquely narrowed before the anterior coxal cavities; the grooves entire, very deep 

 throughout, but not nearly reaching the cavities ; the propleurse not grooved. 

 Length 12, breadth 3f millim. ( J .) 



Hab. Nicaragua, Chontales (Belt). 



One specimen. This beautiful insect is allied to the South-American A. pectinata, 

 Cand., but differs from it in the shorter prosternal grooves, the non-tuberculate thorax, 

 &c, and also in having tbe suture thickened in front and raised above the scutellum. 

 The antennae are formed very much as in A. pectinata, but they are more thickly 

 fringed with hair. The scales on the head and thorax are so dense as to hide the 

 sculpture. 



DILOBITARSUS. 



Dilobitarsus, Latreille, Ann. Soc. Ent. Fr. 1834, p. 142 ; Candeze, Monogr. Elat. i. p. 75 ; Revis. 

 Elat. p. 31. 



Twenty-three species of this genus have been described, all but four of which are 

 from Tropical America. They are found under bark. D. comutus, Cand., from 

 Tropical Africa, has the prosternal grooves abbreviated and open behind, in this respect 

 resembling Adelocera viridis. 



The three closely allied Central- American species may be separated thus : — 



Marginal carina of the prothorax strongly flexuous inopinus. 



Marginal carina of the prothorax moderately flexous. 



Prothorax not deeply sulcate down the middle bidens. 



Prothorax deeply sulcate down the middle eloini. 



1. Dilobitarsus inopinus. (Tab. XI. fig. 6.) 



Dilobitarsus inopinus, Cand. Revis. Elat. p. 35 \ 



Hab. Mexico, Jalapa and Misantla in Vera Cruz (H'dge); Guatemala, Mirandilla 

 (Champion); Nicaeagua (coll. Janson 1 ). 



