1867. 23 
Streptolabis, n. g. 
Body oblong, depressed, dilated posteriorly, glabrous. Head small, cycg not 
prominent, finely facetted, deeply emarginated ; muzzle short, mandibles flattened 
at base and porrect, curved upwards towards their tips ; terminal joints of palpi 
ovate, truncated. AntennEe shorter than the body, stout ; basal joint thick, clavate ; 
the rest, from the third, sulcated, dilated at their apices, with inner apical angles 
produced. Thorax unarmed, anterior and postei'ior margins with distinct smooth 
rim. Elytra broadly rounded at the apex, with a sutural tooth. Presternum 
narrow, tubercled at the apex, mesosternum plane. Legs stout, glabrous, thighs 
clavate, toothed beneath, tarsi short, basal joints triangular. 
St. hispoides, n. Bp. 7j hues. ? (?). Oblong, depressed, coral-red ; antennae, 
excepting the basal joint, black ; elytra black, finely rugose and opake, with 
elevated, shining, reticulated lines, and six irregular spots, with apex, coral-red ; 
head and mandibles rugose-punctate ; thorax smooth, finely punctured. 
Ega, Upper Amazons ; on the trunk of a dead tree. The species 
has a great resemblance to the Hispide species Gephalodonta spinipes. 
It also resembles in colours and form of the legs the Longicorn insect 
Erythroplatys coralUfer (White), but the muzzle of that species is 
greatly elongated, and the maxillae and palpi have the same form as in 
the Ehinotragine and Callichromine groups ; whilst in Streptolabis they 
are conformable to the Traclii/derincB, of which group I consider the 
new species to be an aberrant member. 
^CHMUTES, Pascoe, M.S., n. g. 
Oblong, flattened, dilated behind (fades of Lyons). Muzzle elongated as in 
Oregostom.a. External maxillary lobe greatly elongated ; eyes nearly appi-oximating 
in front, forehead plane. Antennae much shorter than the body, middle joints 
greatly dilated, with the inner apical angles produced ; 2nd and 4th joints with a 
fringe of strong bristles on the outside, 4th joint shorter than the 5th. Thorax 
narrowed in front. Elytra truncated in a waved line at the apex, \^ath both ends 
of the truncature spined. Legs shortish, stout, thighs clavate, hind legs a little 
longer than the rest. Tarsi short, broad, joints triangular. 
^.lycoides, n. sp. 4^ lines (??). Depi'cssed, naked, opake testaceous-red. 
Antennse black ; thorax with two black stripes on each side, extending to the eyes. 
Elytra with a large common pentagonal patch near the base, and the apical fourth, 
black. Tarsi and tibise black, thighs testaceous, black in the middle. Whole upper 
sm-face very closely punctured; elytra with a i-aised line extending from the 
shoulders nearly to the apex. 
Ega, Upper Amazons. The insect has a striking resemblance to 
a species of Lycus. The genus is interesting as being an irrtermediate 
form between Rhinotragus and the singular genus Erythroplatys. 
Pandrosos, n. g. 
Slender, linear, muzzle much shorter and wider than in Rhinotragus and 
Oregostoma, the eyes wholly lateral and very widely separate in front. Antennsa 
