136 [June, 



distance down the suture and sides posteriorly, includes a ti'ansverse 

 flavous fascia on the disc of each elytron at about the middle. The 

 markings are doubtless variable. The mandibles are trifid, as in C.fas- 

 ciatum. The apical joint of the labial palpi is I'ather small, subtriangular, 

 not hollowed at the apex. 



7. — Colparthrum nati tense, n. sp. 



S . Moderately elongate, rather narrow, shining ; aeneo-piceous or aeneo- 

 testaceous, the front of the head, the palpi at the base or entirely, the antennae 

 wholly or in part, the basal halves of the femora, and the tibiae and tarsi, testa- 

 ceous or ferruginous, the elytral suture broadly infuscate in the paler example ; 

 the head and elytra with a few, very long, erect, setiform hairs. Head almost 

 smooth, the deep inter-ocular impression bisulcate, the eyes very large and 

 narrowly separated; apical joint of labial palpi triangular; antennae long, 

 reaching to near the middle of the elytra, rather stout, joint 11 about three 

 times as long as 10. Prothorax oblongo-subcordate, as long as broad, a little 

 narrower than the head, smooth, shallowly transversely impressed on each side 

 at about the middle, the basal sulcus very deep. Elytra moderately elongate, 

 at the middle nearly twice as wide as the prothorax, compressed at the sides 

 below the humeri, and somewhat acuminate posteriorly ; coarsely, closely 

 striato-punctate, the punctures becoming much finer beyond the middle and 

 there placed in deep striae, the interstices 1, 3, 5, 7, and 9 with a row of 

 scattered, setigerous impressions. Femora strongly clavate. 



Length 6, breadth 2-2'iV mm. 



Hah. : Upper Amazons, San Paulo [de Olivenca] (if. W. Bates), 

 Nauta {Miis. Brit. : type). 



Two males, the Nauta specimen (received by the Museum in 1858) 

 slightly immatvu-e, and in consequence paler than the other, the insects 

 agreeing precisely in other respects. The very large, narrowly separated 

 eyes, and the relatively short, submetallic elytra, distinguish C. nautense. 

 The eyes are shaped as in C. Jlavosellatum and C. foveiceps. The 

 localities are not very far distant, Nauta being above the other and on 

 the same river, but in Peruvian territory. 



8. — Colpartlirum nigricauda, n. sp. 



Elongate, shining, the elytra dull ; nigro-piceous, the elytra obscure 

 castaneous, black along their apical margin, and with scattered bristly hairs 

 on the alternate interstices. Head about as wide as tlie prothorax, smooth, 

 the broad inter-ocular space with a transverse, subarcuate, deep, laterally 

 foveate, impression, the eyes large, distant ; antennae rather short, slender at 

 the base, thickening outwards, joint 11 a little longer than 10. Prothorax 

 smooth, convex, cordate, slightly longer than broad, deeply constricted and 

 transversely grooved before the base. Elytra long, broad, at the base twice as 



