Stajjhr/linidcB of the Amazon Vallei/. 273 



narrower tlian the elytra ; the eyes only moderately large, 

 and placed much nearer the antennae than the vertex ; the 

 surface rather closely and moderately coarsely punctured, 

 with simple impressed punctures, castaneous in colour, 

 shining, and bearing a fine erect pubescence. Thorax 

 much narrower than the elytra, nearly as long as broad, 

 without angles, rounded in front, narrowed towards the 

 base, and gently curved at the sides ; its colour and sculp- 

 ture similar to those of the head, but with an impunctate 

 line along the middle, not reaching however to the fi-ont. 

 Elytra longer than the thorax, rather inflated, yellowish 

 in colour, but paler at the extremity and slightly clouded 

 about the middle, shining and almost impunctate. Hind 

 body broad and short, strongly margined, the segments 

 very finely and indistinctly punctured ; the 6th infuscate, 

 but pale at the extremity. Legs slender, pale yellow. 



In the male the ventral plate of the 6 th segment of the 

 hind body is emarginate at the extremity ; the apical seg- 

 ments are retracted in my only individual. 



Ega ; a single male. 



2. Monista longula, n. sp. Rufo-castanea, nitidula, 

 IDedibuselytrorumque apicetestaceis, antennis basi apiceque 

 dilutioribus ; capite thoraceque crebre fortiter punctatis, 

 hoc latitudine longiore, linea media impunctata ; elytris 

 fere impunctatis. Long. corp. 1^ lin. 



Antennae yellowish at the base and extremity, with the 

 middle joints a good deal darker than the others. Thorax 

 longer than broad ; its greatest -width in front of the middle, 

 thence much narrowed towards the front, and a good deal 

 towards the base. Hind body with the 6th segment 

 concolorous. 



St. Paulo ; a single female. 



Ohs. — This species is closely allied to M. certa, but is 

 readily distinguished by its more elongate thorax. 



3. Monista divisa, n. sp. Rufo-testacea, nitidula, 

 capite, thorace, elytrisque piceis, his apice late testaceis ; 

 antennis pedibvisque testaceis, illis ante apicem infuscatis. 

 Long. Corp. 1^ lin. 



Antennae rather shorter than head and thorax ; 3rd joint 

 slightly longer than the contiguous ones ; joints 7 — 10 

 infuscate, the others yellowish ; 10th joint transversely 



TRANS. ENT. SOC. 1876. — PART II. (jUNE.) T 



