of the Amazons Valley. 37 
of body, and in the long setiform antenne, more than twice the 
length of the body, and fringed with fine bristles or hairs be- 
neath. It differs, according to Serville, im the vertical instead 
of retracted inclination of the face, and in the elytra being 
squarely instead of obliquely truncated or pointed at the apex. 
I find, on the examination of a series of species, that these two 
characters do not go together, some species having the head of 
a Megacera with the elytra of an Hippopsis. One of the following 
species described under Meyacera (M. prelata) has, however, a 
facies quite distinct from Hippopsis, owing to the greatly swollen 
posterior orbits of the eyes and absence of lineation in the co- 
lours of the thorax and elytra. In general form it much re- 
sembles M., vittata of Serville, the type of the genus. 
1. Megacera prelata, n. sp. 
M. linearis, parallelogrammica, olivaceo-cinerea; capite, thorace, ely- 
trorum basi. et antennis cbscurioribus; antennis longissimis ; 
capite verticali, orbitu oculorum incrassato; thorace transversim 
valde rugoso ; elytris sinuato-truncatis, angulis prominulis acutis. 
Long. corp. 9 lin., antenn. 28 lin. 
Head with vertex moderately elongated and subconvex, punc- 
tured ; face short, nearly vertical, clothed with dark olive-ashy 
tomentum ; posterior orbit of eyes thickened and prominent. 
Antenne more than three times the length of the body, blackish, 
scantily clothed with olivaceous tomentum. Thorax cylindrical, 
anterior and posterior transverse sulcus well marked, the inter- 
mediate part of the dorsal surface covered with coarse transverse 
rugee; dark olivaceous. Elytra lear, very slightly narrowed 
close to the apex, the latter transversely sinuate-truncate, both 
angles faintly prominent ; surface finely punctured towards the 
base, light olivaceous ashy, smooth, base a little darker. Body 
beneath and legs clothed with smooth olivaceous-ashy tomentum. 
One example on a slender branch in the forest, Ega. 
2. Megacera apicalis, un. sp. 
M. linearis, postice perparum angustata, griseo-nigra; capite pone 
oculos tumidulo, lateribus lineisque duabus verticis antice con- 
vergentibus fulvis ; thorace et elytris utrinque fulvo trivittatis, 
vitta interiore elytrorum juxta basin attenuata, vittis omnibus ante 
apicem in fasciam griseo-fulvam terminatis, ipso apice nigro, 
sinuato-truncato, angulis acutis. Long. 5-7 lin. 
Head with vertex moderately prolonged ; face short, slightly 
retracted ; black, clothed with thin grey pile, sides and two coronal 
vittze converging in front tawny; vertex coarsely but sparingly 
punctured; sides somewhat tumid behind the eyes. Antenne 
nearly three times the length of the body, basal joints densely 
