StajjliylhiidcB of the Amazon Valley. 101 



broad, shining reddish-yellow, impunctate, except for 

 some punctures along the margins. Scutellum large, 

 shining red, impunctate. Elytra as long as the thorax, 

 shining red, with two or three not very distinct punctures 

 along the suture, Avith two other punctures near these, 

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

 a fcAv lateral pvmctures. Plind body blackish, AAdth irides- 

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

 the folloAving segment yellow, the lateral styles of the ter- 

 minal segment black. Legs reddish-yelloAv, stout. 



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

 hind body has a shallow emargination in the middle of the 

 hind margin. 



Ega. 



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

 belicA'e to be conspecific, and one of AA'hich I have described 

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

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

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

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

 more or less infuscate ; whether these differences in colour 

 Avill prove to be sexual, I am unable to say. 



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

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

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

 examination I think it Avill more probably prove to be a 

 distinct species. 



CORDYLASriS. 



This genus Avas proposed by Nordman for a most 

 remarkable insect, and it has hitherto remained Avithout 

 any known near allies ; the extremely rare ScariphcBus 

 luridipennis connects it unmistakably Avith HcRmatodes, 

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

 lection. The only species yet distinguished is, — 



1. Stapliylinus pilosus, Fvih. 



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 from the 

 Amazons, and consider that they form a most unexpected 

 addition to the South American fauna ; except these 



