of the Amazon Valley. 2417 



Genus Malacopterus, 



Serville, Ann, Soc. Ent. Fr. 1833, p. 565; Lacord. Gen. 

 viii. 227. 



1. Malacopterus lineatus, Guerin, Icon. Regne Anim. 

 p. 222. 



Elongatus, depressus, pallidus ; elytris utrinque brunneo 

 bivittatis, thorace medio carinato, margine postico pro- 

 ducto-lobato ; an tennis fortissimis ( S ) aiDicem versus 

 attenuatis. 



Long'. 10 lin. 



Hah. — Para. 



Sub-fam. Achrysoninji. 



This sub-family differs from the CEmina;^ only in the 

 anterior haunches being less angulate externally, with 

 the sockets having a corresponding narrower and shorter 

 opening on their outer side. 



Genus Achryson. 



Serville, Ann. Soc. Ent. Fr. 1833, p. 572 ; Lacord. Gen. 

 viii. 232. 



1. Achryson surinamum. 



Ceramhyx surinamus, Lin. Syst. Nat. ii. 632. 



A widely-distributed and well-known insect, cylindrical 

 in form, of pale reddisb-testaceous colour, witb a black 

 circumflex mark on the posterior disc of each elytron, 

 and a few smaller spots on the anterior part of the same. 



Common throughout the Amazons ; the earlier states 

 are passed in the interior of certain trees having wood of 

 a light texture, and the insect is often found in the 

 neighbourhood of houses. 



2. Achryson nanum, n. sp. 



Parvum, lineare, rufo-testaceum, unicolor, corpore toto 

 longe pilose; thorace quam in A. surinamo longiori et 

 raagis cylindrico, creberrime subtiliter rugose, tuberculis 



t2 



