1903.] COLEOPTERA OF THE PERCY SLADEN EXPEDITIOX. 253 



hitherto described species of its genus, B. carmeUtus Gyll. It is 

 larger, however, and has a still more slender rostrum, which in a 

 specimen brought by H. W. Bates from Pard is as long as the 

 prothorax and elytra together. In the Chapada specimen it is 

 slightly shorter. This may be the other sex, but I think most 

 probably both are females. The polished surface of this species, 

 clothed only upon the elytra with a velvety tomentum, and the 

 uniform black colour are quite sufficient to distinguish it. 



Prostenus sladeni, sp. n. (Plate XXVIII. fig. 6.) 



Capite pronotoque viridi-cyaoieis, capitis fronie inter antennas 

 dense fortiter que, clypeo parcius, punctata ; prothorace quam 

 latitudine basis vix hreviore, ante medium latiore, stipra 

 omnino fortiter reticulatimque punctata ; elytris oineo-cupras- 

 centihus, nitidis, subovatis, valde convexis, fortiter striato- 

 punctatis, interstitiis inter series punctorum punctis mi7ioribus 

 piligeris, humeris utrisque tioberculo conico munitis ; corpore 

 subtus pedib'usque cyaneis, nitidis, his longis, femoribus modice 

 clavatis subtiliter parce punctatis, tibiis densius punctatis ; 

 antennis medium elytrorum, paullo superantibus, articulis 

 quinque ulthnis sat valde dilatatis, articulo 3° quam 4" paullo 

 longiore. 

 Long. 12, lat. 4g mm. 

 Ilab. Central Brazil. 



Head and prothorax bluish green above, elytra bronzy green 

 and nitid. Head closely and rather strongly punctured between 

 the antennae, the clypeus being as strongly but less closely 

 punctured. Antennae reaching beyond the middle of the elytra, 

 with the last four or five joints rather strongly dilated and the 

 3rd joint perceptibly longer than the 4th. Pi'onotum widest a 

 little before the middle, very slightly nan-owed anteriorly, but 

 distinctly narrowed towards the base, where its wi^th is about 

 equal to its length along the middle ; its surface strongly punc- 

 tured all over, the punctures, many of which are setigerous, 

 forming a reticulation. Elyti-a strongly punctured in rows, with 

 smaller setigerous punctures on the intervals between the rows, 

 each with a small conical tubercle or prominence at the shoulder. 



Sph^rion sladeni, sp. n. (Plate XXYIII. fig. 7.) 



5 . Nigrum, ; elytris ceneo-viridescentibus pube grisea densa et 

 setis rigidis sparsis obtectis ; prothorace lateraliter obtuse 

 iuberculato, disco ittrinque leviter tuberculato, medio crebre 

 punctulato, plaga parva postico-mediana polita ; elytris sat 

 dense punctatis; antennis quam corpore paullo longioribus, 

 articulis S^-G**™ apice vix perspicue spinosis. 



Long. 14, lat. 3| mm. 



Hob. Central Brazil. 



Black, with the exception of the elytra which have a somewhat 

 brassy-green tint ; the whole rather densely covered with a fine 

 greenish-grey pubescence, with here and there some erect fulvous 



