423 Mr. H. W. Bates on the Longicorn Coleoptera 
base; disk with two slightly raised lines, pale yellowish testa- 
ceous, clothed with fine silky tomentum; a triangular spot over 
the shoulder and a round one near the suture, towards the apex, 
black. Body beneath and legs testaceous; breast with a black 
belt. 
Santarem. Resembles in form and colouring certain species 
of Megalopus (family Phytophaga). 
6. Amphionycha Sapphira, u. sp. 
A. elongata, angustata, postice sensim attenuata; nigra, fronte, vitta 
coronali, vittis lateralibus thoracis lineisque quatuor elytrorum _ 
ceruleis; his disco bicostatis, apice sinuato-truncatis, basi macula 
magna aurantiaca; antennis corpore longioribus, robustis, fili- 
formibus, nigris, dense ciliatis. Long.53 lin. dg. 
Head a little broader than the thorax, deeply impressed on 
the crown, clothed with pale-blue tomentum ; occiput coarsely 
punctured, black, naked except on the pale-blue tomentose vittz. 
Antenne one-fourth longer than the body, stout, filiform, black, 
densely fringed to the apex; third joint elongated. Thorax 
elongated, cylindrical, uneven, broadest in the middle, black, 
coarsely punctured ; sides each with a broad vitta of clear hight 
blue, the black parts naked. Scutellum black. Elytra narrow, 
elongated, tapering from base to apex, the latter briefly sinuate- 
truncate, with both angles produced and acute; disk coarsely 
punctured, except near the apex and along the two slightly 
raised lines; lateral carina straight ; colour blue black, shining, 
with the suture, a line along the disk, and lateral margins 
pale blue; a rounded orange-coloured spot at the base of each 
elytron. Body beneath and legs clothed with fine blue-grey 
pubescence. 
I met with one example only of this remarkable species, at 
Ega, on the Upper Amazons, on a leaf. 
7. Amphionycha cephalotes, Pascoe. 
Amphionycha cephalotes, Pascoe, Trans. Ent. Soc. n.s. vol. iv. p. 250. 
A. modice elongata, linearis, rufescens ; elytris lateribus fuscis, apice 
suturaque antice cinereo sericeis; capite lato, convexo ; thorace 
postice strangulato; elytris linearibus, supra planis, punctato- 
striatis, apice rotundatis; antennis corpore paulo longioribus, 
longe ciliatis, nigris, articulis tribus vel quatuor terminalibus 
flavis; tibiis extus fuscis. Long. 4 lin. 
Found at Ega, Upper Amazons, and on the banks of the 
Tapajos, on foliage. 
8. Amphionycha megacephala, n. sp. 
A. linearis; capite valde convexo, nigro, polito; antennis nigris ; 
