AMPHICRANUS. 291 
2. Amphicranus balteatus, sp.n. (Tab. IX. figg. 6; 6a, apex of elytra.) 
Elongatus, nitidus, glaber, niger, elytris a basi usque ad medium rufo-testaceis, subtus post prothoracem, cum 
pedibus, testaceus; prothorace oblongo, anterius subangustato, margine apicali medio dente instructo ; 
elytris a medio oblique excavatis, ad apicem productis divaricatis, ambitu excavationis utrinque prope 
suturam tridentato, dente 3° maximo. 
Long. 8 millim. ; lat. 2:2 millim. 
Elongate, shining, glabrous. Head hidden in the type, its underside fusco-testaceous ; antennz infuscate, the 
club black, large, obovate, pubescent, the sutures slightly curved. Prothorax elongate, somewhat elliptic, 
the sides convergent from the base, subconstricted towards the apex, which is circularly rounded, with a 
small median marginal tooth; surface black, becoming piceous at the sides, cylindrical to near the apex, 
thence strongly declivous, with transverse rows of asperities, the horizontal portion in front with traces 
of asperities, behind very finely punctured. Scutellum triangular, piceous. Elytra obliquely declivous 
from the middle, strongly produced and divaricate at the apex, bright ferruginous, with the apical half 
black ; surface finely punctured in indistinct rows, each lateral margin of the excavation with three 
teeth close to the suture, of which the third is the largest, its prolongation with an incurved pointed 
median elevation, thence declivous and rounded to the apex; fundus shining, somewhat hollowed at the 
apex and scantily hairy, obsoletely punctured, with the suture elevated. Underside, behind the prothorax, 
testaceous, paler posteriorly ; coxe and legs pale testaceous, the knees darker. 
Hab. GuatemMata, Cerro Zunil (Champion). 
A single example of this species, one of the handsomest of the Scolytide, was taken. 
The contrast between the pale underside and legs, the black thorax, and parti-coloured 
elytra is striking. 
Amphicranus retusus. 
Amphicranus retusus, Kichh. Berl. ent. Zeitschr. 1868, p. 2761; Rat. Tom. p. 466’. 
Hab. Guiana, Cayenne’; Ecuapor; Brazit, Rio Janeiro (fry). 
This species varies in size, colour, and the sculpture of the elytral excavation; the anterior tooth of the 
latter may be nearly obsolete and indistinctly bifid, the posterior tooth and the ridge running inwards from 
it are variable in size, and the punctuation of the fundus varies in distinctness. An example from Cayenne, 
and two from Ecuador, examined by me, have the prothorax sanguineous, with a black basal limb; in the 
former the anterior margin and flanks also are dark. In the Ecuador specimens the forehead is visible ; it is 
obscure ferruginous, opaque, closely shagreened, and obsoletely punctured; over the mouth is a raised oval 
space, more coarsely shagreened, and apparently a stridulating-organ. Mr. Fry’s example from Rio Janeiro 
has a fasciculus of longish hairs on the inner face of the antennal club; by analogy with other genera this 
would appear to be a female character. The prothorax is black. 
Amphicranus fryi, sp. n. 
Elongatus, ater, prothorace sanguineo, pedibus ferrugineo-piceis ; differt ab A. retuso statura minore, magis 
attenuata, prothorace quam latitudine amplius tertia parte longiore, apice fortius rotundato, margine 
apicali ipso medio nullo modo emarginato, immo vero subprominulo, disco lateraliter ad basim confertius 
punctato; excavationis elytris fundo magis elongato, profundiore, preter suturam equaliter concavo, _ 
dente 2° postice haud crenato. 
Long. 7 millim.; lat. 2 millim. 
Hab. Brazit, Rio Janeiro (Fry, in Mus. Brit.). 
The absence of the anterior prothoracic emargination and the more slender form distinguish this species 
which in other respects does not markedly differ from A. retusus. 
2 PP2 
