Staplnjlinidai of the Amazon Vallei/. 187 



the three basal johits bhie, the rest obscure. Palpi stout. 

 Mandibles about two-thirds of the leuo-tli of the head. 

 Head quite as broad as the greatest width of the thorax, 

 its width about as great as from the front of the eyes to 

 the back of the head ; the whole of the ui)per surface 

 densely, evenly and coarsely rugose-punctate, beneath 

 very shining, the punctures there about twenty-four on 

 each side ; those at the back angles small, the others very 

 large, the middle part quite free. Thorax considerably 

 longer than broad, a little narrowed from the base to the 

 middle, more narrowed from the middle to the front ; a 

 deep oblique impression on each side, near the back ; the 

 sides in front of the impression rather sparingly punctured, 

 a bi'oad middle line impunctate. Elytra longer than the 

 thorax, finely and sparingly punctured. Hind body very 

 shining, very finely and very sparingly punctured. Legs 

 violet. Hind body beneath less sparingly and finely 

 punctured than above. 



Ega ; six individuals. 



Ohs. — ^ These specimens vary somewhat in their coloiu*, 

 Avhich is sometimes piu'ple, sometimes of a bluer or greener 

 tint ; the pimctures also on the underside of the head are 

 more numerous and distinct in some individuals than in 

 others. Two specimens have the 7th segment beneath 

 a little depressed in front of the hind margin, and more 

 finely punctured and pubescent, the hind margin itself 

 being very slightly emarginate ; I think they are pro- 

 bably males. 



2. Stcrculia pauloejisis, n. sp. Cyanea, nitida, thorace 

 elytris breviore, capite oblongo, subtus basin versus parcius 

 punctato, mandibulis capite brevioribus. Long. corp. 

 12 lin.: lat. elytrorum apice 2§ lin. ; prothoracis basi 

 If lin. 



Very closely allied to the ]n-eceding species, but larger, 

 and with the mandibles a little longer, the head and tho- 

 rax broader, the head being distinctly broader than the 

 thorax, Avhile the thorax is less slender in front; the 

 pvmctures on the under side of the head are only eleven 

 in number, smaller punctures near the hind angles being 

 quite absent. 



St. Paulo ; a single individual. 



Obs. — It is quite possible this may not prove to be a 

 distinct species from the iS\ omazoidca, which, as I have 

 above noticed, appears to be somewhat variable. 



