186 Mr. D. SliJ^p^s Contributions to the 



antennis articnlis 3 — 10, clytrisqiie basi infuscatls. Lono;. 

 corp, 1 \ liu. 



Antemiii; coiisidci-aMy l()iij:f('r tliaii tlio licad, tlie two 

 basal joints and the last joint yellow, the others infuscate; 

 3rd joint about as long as 2nd, 6 — 10 rather transverse. 

 Head narrower than the thorax, narrowed in front, reddish- 

 yellow, convex, the front part sparingly and indistinctly 

 punctured, the vertex smooth. Thorax a little narrower 

 than the elytra, considerably longer than broad, distinctly 

 narrowed in front, the sides slightly curved ; it is reddish- 

 yellow, and has four punctures ])laced near one another 

 on the middle, behind ; in front of these, two others much 

 farther apart, and on each side five or six other punctures 

 near the lateral margin. Elytra scarcely so long as the 

 thorax, yelloAvish, indistinctly darker near the base, 

 sparingly and indistinctly ])unctured, the jiunctures dis- 

 ])Osed in lines. Hind body dusky yellowish, very finely 

 and densely punctured. Legs pale yelIow% Front tarsi 

 not dilated. 



Tapajos ; two specimens. 



Sterculia. 



This genus consists at present of six species, all peculiar 

 to South America, and I here descriljc seven new ones. 

 The genus contains two apparently distinct groups: the 

 first of these consists of large and brilliant species, which 

 are amongst the most splendid of the Stapln/Iinidce ; the 

 species, however, bear such an extreme resemblance to one 

 another, that, although I have twenty difl:erent forms be- 

 longing to it sepai'ated in my collection, I am by no means 

 sure how many species they represent : the second group 

 consists of black and rather smaller species, which have the 

 mandibles much less elongate than the metallic s])ecies. 

 »S'. amazonica, S. paulocnsis and S. discolor belong to 

 the group of metallic species, -while the other four here 

 described are black species with short mandibles. 



1. Sterctdia amazonica, n. sp. Cyanea, nitida, thorace 

 elytris breviore, capite oblongo, subtus lateribus parce 

 ])unctato, medio la)vi, mandibulis capite brevioribus. 

 JLong. corp. lOlin.; lat. elytrorum apice23^1in.; prothoracis 

 basi 1^ lin. ^ 



Antennfc rather stout, not thickened after the 4th joint ; 

 3rd joint about twice as long as 2nd, 4 — 10 transverse; 



