StaphylinidcB of the Amazon Valley. 101 



broad, sliiiiing recldish-yellow, impunctate, except for 

 some punctures along the margins. Scutellum large, 

 shining red, impunctatc. Elytra as long as tlie thorax, 

 shining red, with two or three not very distinct punctures 

 along the suture, with two other punctures near these, 

 with a discoidal series of four or five punctures, and with 

 a few lateral punctures. Hind body blackish, with irides- 

 cent metallic reflection, the hind part of the 6th and all 

 the foUowina: seirment vellow, the lateral stvles of the ter- 

 minal segment black. Le2:s reddish-vellow, stout. 



In the male the ventral plate of the 7th segment of the 

 hind bodv has a shallow emargination in the middle of the 

 hind margin. 



Ega. 



Ohs. I. — I have before me eight specimens, which I 

 believe to be conspecific, and one of which I have described 

 as above. Three of these individuals are males, and agree 

 closely with one another, except that in one of them the 

 breast is red. The five females differ from the males, inas- 

 much as they have the elytra and thorax black, and the legs 

 more or less infuscate ; whether these difierences in colour 

 will ]3rove to be sexual, I am unable to say. 



Ohs. 11. — This species is, to judge from Erichson's 

 description of Q. lahiatus, very closely allied thereto, and 

 I had at first considered it a variety thereof, but on careful 

 examination I think it will more probably prove to be a 

 distinct species. 



CORDYLASnS. 



This genus was proposed by Nordman for a ^ most 

 remarkable insect, and it has hitherto remained without 

 any known near allies; the extremely rare Scariphceus 

 luridipennis connects it unmistakably with H(pmatodes, 

 and I have one or two other uudescribed allies in my col- 

 lection. The only species yet distinguished is, — 



1. Staphylinus pilosus, Fab. 



Found by Mr. Bates at Para, Tapajos and St. Paulo. 



Platyprosopus. 



This genus up to the present time consists of nine or 

 ten described species found in the warm portions of the 

 Old World. I here add another ten species fr'om the 

 Amazons, and consider that they form a most unexpected 

 addition to the South American fauna ; except these 



