StaphijUjnda of the Amazon Valley. 421 



acute tubercle on each side, and behind this Avitli two 

 coarse punctures on each side. Thorax scarcely \\ lin. in 

 length by \\ in breadth. Elytra just as long as thorax, 

 with their inflexed margin rather coarsely punctm'ed. 

 Hind body slender; on the upper side, at the base of each 

 segment, there are no punctures in the middle ; on the 

 under side the basal segment is without punctures in the 

 middle ; the following segments rather coarsely punctured 

 at the base ; the 6th segment more sparingly than the 

 the others ; metasternum with only ten or twelve not very 

 distinct punctures on each side, external to the middle 

 coxae. 



Fonte Boa ; two individuals, communicated by Dr. 

 J. W. H. Trail, who captured them there on the 17th 

 October, 1874; and also found at Ega by Mr. Bates. 



Ohs. I. — This species, in the structiu-e of its head and 

 mandibles, is very closely allied to the Brazilian L. scoria- 

 ceus, Germ, but is much smaller and especially narrower ; 

 the antennae are considerably shorter, and the fine dense 

 punctuation found at the base of each of the two or three 

 front segments, on the upper sic|.e of L. scoriaceus, is 

 wanting. 



Obs. II. — I have drawn up the above description en- 

 tirely from one of the Fonte Boa individuals, Avhich is, 

 I believe, a female ; the individuals from Ega, of which 

 several are before me, are slightly smaller, and show a 

 slightly greater development of the punctures on the under 

 side of hind body ; but these differences are only very 

 slight, and I believe all the indi\iduals from l^oth localities 

 to be of one species. 



2. Leptochirus brunneoniger, Perty; Fauvel. 



Ega ; two individuals. 



This appears to be a widely distributed, and yet but 

 little variable, species. I see no difference between these 

 Ega specimens and individuals from near Rio de Janeiro, 

 and the species is recorded by Fauvel as Mexican. I have 

 not myself seen any specimens from the north of the 

 Amazons ; on the other hand, an individual in my collec- 

 tion is labelled " Peru." 



3. Leptochir7is latro, n. sp. Xiger, nitidus, thorace 

 sanguineo ; mandibulis brevibus ; antennis crassiusculis ; 

 vertice canaliculate, caualicula antice profunda, clypeo 



