Mr. H. W. Bates’s Notes on Longicorn Coleoptera. 291 
femoribus basi testaceis; trochanteribus posticis productis, 
acutis. 
Long. 6-7 lin. ¢. 
Rio Janeiro, Minas Geraes. 
Resembles Spathoptera gutticollis, Thoms., but is smaller, 
and distinguished at once by the generic character of unarmed 
thorax. In Spathoptera the sides (behind the middle) are fur- 
nished with a long and robust, spine (obtuse at the point) ; in the 
present species they are simply though rather strongly rounded. 
Isomerida plumosa. 
Angustior, elongata, nigra; antennis articulis secundo ad sextum 
supra, infra et intus densissime nigro-penicillatis ; thorace brevi- 
ter cylindrico, lateribus medio vix rotundatis, basi et apice paul- 
lulum sulcatis; linea laterali vix conspicua pallida; elytris apicem 
versus perpaullum dilatatis, apice singulatim rotundatis; dorso 
sublineatim punctulatis, carina laterali elevata, apicem fere attin- 
gente, epipleuris vitta indistincta cinerea; femoribus basi rufo- 
testaceis; trochanteribus posticis spiniformibus. 
Long. 74 lin. 3 Q. 
Rio Janeiro, ¢ Tucuman. 
The brush-lke ornamentation of the antenne, at first sight, 
resembles that of Isomerida crinicornis (Germar); but in that 
species the pencils are on the under side of the joints only 
from the first to the seventh, though on each joint they form 
two diverging brushes. J. crinicornis has the elytral suture 
pale testaceous, and the posterior trochanters simple. 
Isomerida picticollis. 
Elongata, nigra, subtiliter griseo-pubescens, fronte maculis duabus, 
occipite vittis duabus thoraceque macula magna utrinque antico- 
laterali cano-tomentosis, elytris linea utrinque juxta carinam 
marginalem testacea; fronte convexa; thorace parvo, basi con- 
stricto; elytris elongatis, fere parallelis, apice singulatim rotun- 
datis vix truncatis, supra crebre punctulatis ; antennis 3 corpore 
haud longioribus, articulis primo ad septimum infra subpenicil~ 
latis, tertio czeteris conspicue longiore. 
Long. 6 lin. ¢. 
Parand, South Brazil. 
Although the relatively greater length of the third antennal 
joint would bring this species within the definition of Amphio- 
nycha, the thick and somewhat tufted and long cilia of the 
underside of the joints, from the first to the seventh, is a de- 
eided character of the genus Isomertda. The whitish tomen- 
tose spots of the thorax are situated on the antero-lateral part 
on each side, reaching a little way down the flank, but not 
attaining the mesial dorsal line, where there is a very straight 
stripe of the black ground-colour. 
20* 
