35 
elytris insequalibus, lineis tenuibus argenteo-albis inscriptis, basi 
elevatis, apud medium subiiudis nitidulis. Mas segmento ultimo 
ventrali simplici : foemina eodem fovea magna impresso. Long. 
3i-4i lin. d $ . 
Head dark brown. Antennse pitchy brown, the apices of the 
joints paler. Thorax with two dorsal tubercles in a transverse 
line with the lateral ones, all four of equal size; the surface 
punctured dark brown or blackish, varied with lighter brown. 
Elytra with short but strongly elevated and crested centro-basal 
ridges, the space between the two being also elevated and clothed 
with a silky fulvous-brown pile; the sides in the middle have 
each a very large depression : the surface of the elytra is punc- 
tate-granulate in rows, one of which runs straight along the disk 
on each side, continuous with the centro-basal ridge ; others are 
diverted out of their course by the lateral excavations, within 
which the surface is extremely irregular; the disk near the 
suture is irregularly punctured ; towards the apex are some ele- 
vated lines ; the disk is naked and shining : the colour is gene- 
rally nearly black, in some specimens silky brown of various 
shades ; there are also numerous very slender silvery-white lines, 
two of which, more conspicuous, oblique on the disk, form an 
inverted V. Body beneath and legs dark brown, covered with a 
slight pile, and varied with paler shades. Anterior femora 
dilated ; tibise curved and grooved on the inner side. Antenna 3 
capilliform. In the male the apical ventral segment is simple ; 
in the female it has a large deep transverse fovea near the apex. 
This species I met with at Para, at Obydos in Brazilian Guiana, 
and at Santarem ; it is found also at Cayenne. I have received 
it from M. Depuiset, of Paris, as M. ruficornisy var. I think 
there can be no doubt it is the Lamia antennator of Fabricius ; 
his description (somewhat better than the Fabrician descriptions 
usually are) seems to suit our insect sufficiently well. I have 
thought it better to give a more detailed description, for the 
sake of fixing the Fabrician name with more precision. The 
white lines are faint or wanting in some examples. 
2. j^thomerm rufescens, n. sp. 
eloiigatus, tomentosus, brunneo-ferrugineus : elytris insequalibus, 
basi elevatis, omnino brunneo-tomentosis : antennis pedibusque 
ferrugineis. Mas segmento ultimo ventrali apice fortiter bisinuato ; 
foemina latet. Long. 4 lin. c? . 
Head rufous brown. Thorax tuberculated as in antennator, 
clothed with rusty-brown pile, faintly punctured. Elytra with 
short but strongly elevated and crested centro-basal ridges, the 
space between them being slightly elevated; the sides in the 
middle have each a very large depression ; the surface of the 
F 2 
