of the Amazon Valley, 145 



Seriphus viridis, n. sp. 

 *S^. supra viridi-sericeus, purpureo nitens, nigro setosus : thorace 



postice macula, elytris plagis tribus cinereo-tomentosis. Long. 



aflin. d. 



Head minutely punctured, black ; vertex silky green. An- 

 tennae black ; base of the third joint and a broad ring on the 

 fourth grey. Thorax shagreened silky green, the middle of the 

 hind margin with a patch of ashy tomentum. Elytra briefly 

 truncated at the tip; surface thickly punctured towards the 

 base, and having besides many rows of setiferous punctures, 

 running from base to apex ; silky green, changing with the play 

 of light into dullish purple; a rounded spot of ashy tomentum 

 on the disk of each before the middle, and a similar common 

 spot over the suture near the apex. Legs shining black. Body 

 beneath black, clothed with scant ashy pile. 



One example only of this peculiarly-coloured species occurred, 

 namely at Ega, on the Upper Amazons. 



Genus (Edgpeza, Sei-ville. 

 Leiopus (§ CEdopeza), Serville, Ann. Soc. Ent. Fr. iv. p. 88. 

 This group was distinguished by Serville from Leiopits on 

 account of the singular dilatation of the basal joint of the 

 anterior tarsi, and the length of the basal joint of the hind 

 tarsi, which "equals the three following taken together." The 

 enlargement of the anterior tarsi, which is peculiar to the males, 

 seems to be only a specific character, as several other species, 

 agreeing with Serville's (Edopeza in shape of thorax and tarsi, 

 style of coloration, and other minor features, do not present this 

 peculiarity. The group seems to be distinguished from Trypa- 

 nidius, to which it is otherwise closely related, by the great 

 narrowness of the prosternum, the depressed mesosternum, and 

 the length of the hind tarsi. The thorax is convex, and widens 

 from the front to the tips of the lateral spines, which are conical 

 and placed a little behind the middle. The elytra are somewhat 

 uneven, with faint carinse and centro- basal ridges ; they are 

 sparsely setose in some species, naked in others. The terminal 

 ventral and dorsal plates in the c? are more or less emarginated ; 

 and the ovipositor of the ? with its sheath is elongated, the ven- 

 tral plate being truncated, and the dorsal pointed. 



1. (Edopeza pogonocheroides, Serv. 



Leiopus {(Edopeza) Pogonocheroides, Serv. I. c. p. 88. 



This species is sufficiently well known through the description 



of Serville. It is of a brown colour, tawny in some parts, and 



marked behind the middle of the elytra with a black angulated 



Ann. ^ Mag. N. Hist. Ser. 3. Vol. xiii. 10 



