254 MESSRS, C. J. GAHAN AND G. J. ARROW ON THE [ISTov. 3, 



setse. The prothorax is obtusely tubercled at the middle of each 

 side, and has two feeble tubercles on each side of the disk ; the 

 latter is finely and very closely punctulate, but has a small smooth 

 shining space in its median posterior part. The elytra are dis- 

 tinctly but not very closely punctured, and each has a short 

 exterior spine at the apex and the sutural angle obtuse. The 

 acetabula of the middle cox^e extend outwards to the epimera, the 

 present species agreeing in this respect with *S'. cyanipenne Sei'v., 

 the type of the genus. 



Trichophorus electus (Dej. MS.), sp. n, (Plate XXYIII. 

 fig. 8.) 



Fusco-hrunneus ; elytris, pedibus, abdomine et antennarwm 

 articido primo plus minusve riifescentihus ; pronoto lineis 

 duabus interruptisjlavo-pilosis ; scutellojiavo ; elytris utrisque 

 maculis tribusjiavo-pilosis — ;priv?i« ante mediwrnprope sitturam, 

 secunda et tertia obliqioiter positis inter meditcm et partem 

 tertiam apicalem. 

 Long. 15-23, lat. 4-6 mm. 

 Hob. Central and South Brazil. 



This species greatly resembles T. interrogationis Blanch., but 

 has no pubescent spots on the vertex of the head, and the two 

 posterior spots on each elytron are quite separate from each other. 

 It differs also in that the anterior part of the interrupted yellow 

 or white line on each side of the pronotum lies farther back from 

 the anterior margin, especially in the female, in which it forms a 

 small round spot. The antennae of the female are a little longer 

 than the body, those of the male very much longer. The species 

 has for a long time been represented in the British Museum 

 Collection under the MS. name I have adopted, and has also been 

 known as T. 7-signatus Chev. MS. 



Onciderbs sladeni, sp. n. (Plate XXYIII. fig. 9.) 



0. fasciata3 (Lucas) afflnis,sed elytris haud fasciatis, prope basin 

 densitcs granidato-2nc7iciatis, vittis nigris infra-ocularibus 

 capitis latio7'ibus. 



Long. 20-28, lat. 8-1 0| mm. 



Hab. Central and South Brazil : S. Anna da Chapada, Rio 

 Grande. 



This species is the Oncideres maculosa of Dejean's Catalogue 

 {nee Redtenbacher), and appears to be the Oncideres amputator of 

 Thomson (nee Fab.). It belongs to the section of the genus in 

 which the thorax is sHghtly wider behind than in front, and in 

 which the frontal processes of the male are directed forwards and 

 downwards. It is closely allied to 0. fasciata Lucas, but easily 

 distinguishable from it by the absence of fascise from the elytra, 

 the latter being entirely covered with sparse fulvous spots with 

 much smaller spots on the intervals between them. The basal 

 margin of the elytra is fulvous, the scutellum grey ; the black 

 bands on the head below the eyes are wider than in the allied 



