196 HETEROMERA. 
Head large, subtriangular, the post-ocular portion narrow ; elytra with 
obsolete rows of punctures . ’ : : 
Head smaller and more ovate, the post- “ctl perion broad ad laterally 
rounded ; elytra with serial rows of punctures. 
Elytra narrowing from the middle, very densely pubescent ; legs stout ; 
antennz with the apical joint a little longer than the tenth. 
Thorax strongly rounded anteriorly, distinctly wider than the head . 
Thorax only moderately rounded anteriorly, longer and more parallel, 
not or scarcely wider than the head. 
Occipital channel shallow; fifth dorsal segment rounded at the apex 
in the female. 
Occipital channel deep ; fifth dorsal eeoment tridentate at the apex 
in the female. evn SE eee ae 
Elytra parallel, less densely pubescent ; legs more denier ; antenne with 
the apical joint longer, in some species very elongate in the male. 
Antenne slender ; apical joint longer in the male than in the female— 
in the male at least three times, in the female twice, the length 
of the tenth. 
Head densely punctured 
Head quite sparsely punctured . . 
Antenne slender; apical joint longer in the male than i in the female— 
in the male two and a half times, in the female not twice, the 
length of the tenth eer 
Antenne slender; apical joint similar in 1 both sexes, not twice the 
length of the tenth . 
Antenne stout; apical joint twice the length of ‘the tenth j in the rials 
(female unknown) . . . , 
Head rather small, the post-ocular portion broad and laterally subangular ; 
elytra without serial rows of punctures ; antenne with the apical joint 
rather more than twice the length of the tenth (in the male) 
Head rather small, the post-ocular portion broad, obliquely converging 
from the eyes; elytra with serial rows of punctures ; antennz with 
the apical joint twice the length of the tenth. 
princeps. 
CANESCENS. © 
incana. 
tropicalis. 
parallela. 
nitidiceps. 
rufifrons. 
guatemalena. 
crassicornis. 
obsoleta. 
nigricornis. 
1. Macratria princeps. (Tab. IX. figg. 7, 9; 7a, sixth ventral segment, 2 ; 
7 6, ditto, from above.) 
Fusco-ferruginous, the prothorax and elytra sometimes of a more olivaceous tint, very densely clothed with 
brownish or ashy pubescence, and with long, erect, scattered hairs, those on the elytra serially arranged. 
Head large, subtriangular, very broad behind, the post-ocular space narrow, very densely and finely 
punctured, the occipital channel deep and extending upwards; eyes large, oblique, converging in front, 
rather prominent, very coarsely granulated; palpi ferruginous; antenne rather short, ferruginoas, joint 3 
much longer than 2, joints 4—8 about equal in length, 9 and 10 triangular, and each wider and much 
longer than 8, 11 a little longer than 10 and acuminate; prothorax convex, about one third longer than 
broad, distinctly wider than the head, the sides much rounded anteriorly and converging behind, the 
groove on either side of the base shallow, the flanks somewhat hollowed, the surface densely and 
