198 HETEROMERA. 
testaceous; antennz (2 ) testaceous, rather stout, joints 9 and 10 triangular, each very much wider than, 
and nearly twice as long as, 8, 11 about one third longer than 10 and pointed; prothorax distinctly wider 
than the head, one and a half times as long as broad, the sides much rounded anteriorly and strongly 
converging behind, the flanks concave (the lateral limits of the prothorax somewhat sharply defined), the 
basilar groove very deep and extending completely across, the surface very roughly and confluently punc- 
tured; elytra moderately long, comparatively broad, subparallel in their basal half, and thence narrowing 
to the apex, with irregular rows of fine but deep punctures extending from the base to far beyond the 
middle, and a fine longitudinal impressed line extending from the shoulders downwards, the interstices 
very densely and minutely punctured, and also with a few widely scattered punctures similar to those of 
the striz, these punctures, however, more numerous along the suture and at the base, the apices rather 
sharp; legs stout (the femora much thickened towards the apex), the front and middle pairs testaceous 
with the base of the tibize and the femora in the middle above piceous, the hind pair piceous with the base 
and extreme apex of the femora reddish and the tips of the tarsi testaceous, 
Q. Fifth dorsal segment furnished in the middle at the apex with a long slender projecting piece which is 
curved downwards, the apical margin somewhat angularly extended on either side laterally. 
Length 53 millim. ( 9.) 
Hab. Mexico, Jalapa (fHoge). 
One male example. The longer, narrower, and more rounded head, the smaller and 
more finely granulated eyes, the deep basilar groove of the thorax, the very distinct 
rows of punctures on the elytra, the less elongate shape, &c. distinguish WZ. canescens 
from MV. princeps and M. goudotii; and the larger head, shorter and broader thorax 
(the sides of which are much more rounded anteriorly, the flanks more hollowed, the 
basilar groove deeper, and the sculpture coarser), &c. separate it from I. incana and 
M. tropicalis. The elytra are shaped and sculptured as in these latter, from both of 
which it differs in the form of the fifth dorsal segment in the female: this segment is 
furnished with a long projecting piece in the middle as in MW. encana, the apical margin, 
however, being less sharply produced on either side laterally. 
3. Macratria incana. (Tab. IX. figg. 8,3; 84, fifth ventral segment, 3; 8 4, 
sixth ventral segment, ¢; 8c, edeagus, ¢; 9, fifth ventral segment, 2; 94a, fifth dorsal 
segment, @ .) 
Black or pitchy-black, the head reddish or testaceous in front, the labrum paler, the disc of each elytron from 
just below the base to the apex usually indeterminately brownish (the suture broadly, the sides, and the 
extreme base remaining of the ground-colour), subopaque, very densely clothed with fine, silky, ashy or 
yellowish-grey pubescence, and with scattered erect hairs. Head very densely and finely punctured, 
‘rounded at the sides behind the eyes, the occipital channel shallow and not extending upwards; eyes 
moderately large, not prominent; antenne rather slender, testaceous, with joints 7-10 and the basal 
half of 11 piceous or brownish (in some examples entirely testaceous), 3 only a little longer than 2, 9 
and 10 triangular, each much longer and wider than 8, 11 in both sexes about half as long again as 10 
and pointed; prothorax nearly twice as long as broad, not or very little wider than the head, the sides 
moderately rounded anteriorly and converging behind, the groove on either side of the base deep (in fresh 
specimens partly hidden by the pubescence), the surface very densely and roughly punctured; elytra 
subparallel in their basal half, and thence somewhat rapidly narrowing to the apex, with irregular rows 
of fine, rather deep, punctures extending from the base to far beyond the middle, and a fine longitudinal 
impressed line extending from the shoulders downwards, the interstices very densely and exceedingly 
minutely punctured, and also with a few very widely scattered punctures similar to those of the strie, 
these punctures, however, more numerous along the suture and at the base, the apices rounded ; beneath 
