Staj)hi/linid<2 of the Amazon Valley. 235 



quite so deep, and rather broader at its opening ; the 6th 

 segment is only indistinctly impressed along the middle, 

 but the 5 th has a broad and deep impression in the 

 middle, and on each side of this, at the extreme base, is a 

 deep, abruptly-defined, curved, transverse impression. 

 Tapajos ; a single specimen. 



7. Lathrohium certiim, n. sp. Piceum, nitidulum, 

 antennis pedibusque rufo-testaceis ; capite dense subtiliter, 

 anterius parce fortiter, punctato, disco lasvi ; prothorace 

 crebre punctato, linea media impunctata ; elytris crebre 

 fortiter punctatis. Long. corp. vix 4 lin. 



Mas : abdomine scgmento 7° ventrali apice medio pro- 

 funde exciso ; 6° medio leviter emarginato. 



Antennae reddish, about as long as head and thorax. 

 Head as broad as the thorax ; the posterior parts densely 

 rugosely punctured, the anterior part sparingl}^ punctured, 

 the central part free from punctures. Thorax quadrate, 

 just about as long as broad, a broad line along the middle 

 impunctate, the sides rather coarsely punctured. Elytra 

 slightly longer than the thorax, their punctuation quite as 

 coarse as, and similar to, that of the thorax. Hind body 

 dull ; densely, extremely finely punctured, reddish towards 

 the extremity. Legs yellowish. 



The male has at the hinder part of the 7 th ventral seg- 

 ment a deep notch, the entry of it being broad and quite 

 rounded at the sides ; the 6th segment is flattened along 

 the middle, and distinctly emarginate at the extremity in 

 the middle : in these characters it approaches considerably 

 L. puncticeps, but the sides of the notch of the 7th seg- 

 ment are more cut away, so that it is much broader at its 

 entry than in L. puncticeps ; the 6th segment is less im- 

 pressed along the middle, but more deeply emarginate at 

 the extremity. 



Amazons ; a single male individual ; without special 

 locality. 



This species, extremely closely allied to the five preced- 

 ing, has the elytra more coarsely punctured than any of 

 them. 



8. Lathrohium rufulum, n. sp. Rufo-testaceum, niti- 

 dulum, parallelum, abdomine segraentis 2 — 5 infuscatis, 

 capite angulis posterioribus dense subtiliter punctatis, 

 disco Igevi ; prothorace lateribus sat crebre punctato, linea 

 lata impunctata. Long. corp. 3 lin. 



