202 HETEROMERA. 
groove deep and extending completely across, the surface densely and roughly punctured; elytra long and 
parallel, with irregular rows of fine shallow punctures extending from the base to far beyond the middle 
and a fine longitudinal impressed line extending from the shoulders downwards, the interstices finely, 
densely, and somewhat roughly punctured, the apices rounded; beneath black, densely punctured and 
pubescent; legs rather long and slender, the femora moderately clavate, black, the apical joints of the 
tarsi testaceous ; fifth ventral segment truncate and broadly and shallowly emarginate in the male. 
Length 52 millim. (¢.) 
Hab. Mexico, Jalapa (Hoge). 
One male example. Closely allied to WM. nigricornis, and differing thus :—The head 
larger, rounded at the sides behind the eyes (not obliquely narrowing), and much less 
‘closely punctured; the antenne stouter, the apical joint of the same length in the 
male; the elytra with more irregular series of punctures and the interstices more 
roughly and less densely punctured; the legs black. The stout and entirely black 
antenne (the apical joint of which is much shorter in the male), the more thickly and 
less finely punctured head, and the more finely punctured elytra (the punctures of the 
series being much shallower), separate it from MM. nitidiceps &c. 
10. Macratria obsoleta. (Tab. IX. fig. 11, ¢.) 
Black, the head reddish-testaceous in front, the labrum pale flavous, thickly clothed with brownish pubescence, 
the head and prothorax also with long erect hairs, shining (when denuded of pubescence). Head com- 
paratively long, somewhat angularly dilated on either side behind the eyes, the post-ocular portion broad, 
finely and thickly punctured, the occipital channel quite shallow ; eyes moderately large, not very promi- 
nent, converging in front; palpi testaceous; antenne (g) comparatively long and slender, black, joints 
1-4 more or less testaceous, 9 and 10 triangular, each wider and much longer than 8, 11 rather more 
than twice the length of 10 and acuminate; prothorax about one third longer than broad, a little wider 
than the head, the sides moderately rounded anteriorly and converging behind, the groove on either side 
of the base deep but not extending inwards, the surface densely punctured ; elytra subparallel, thickly, 
roughly, and confusedly punctured, with a fine sharp groove extending from the shoulders nearly to the 
apex, the disc without trace of rows of coarser punctures or irregular rows of granular elevations, the 
interspaces smooth and shining, the apices rounded ; legs slender, comparatively long (the tarsi especially), 
the femora clavate beyond the middle, testaceous, the outer half of the hind femora, all the tibie at the 
base, and the basal joint of all the tarsi piceous, the intermediate femora also darker towards the apex ; 
the basal joint of the hind tarsi much longer than the following joints united ; fifth dorsal and fifth ventral 
segments ( ¢ ) truncate at the apex. 
Length 5 millim. (¢.) 
Hab. Costa Rica, Volcan de Irazu 6000 feet (Rogers). 
One maleexample. This species differs from all others of the genus here enumerated 
in the elytra being confusedly punctured, without trace of irregular rows of punctures 
or of granular elevations on the disc. The groove on either side of the base of the 
thorax is not extended inwards so as to meet the opposite one at the middle (as in 
the allied species), these being widely separated in W/. obsoleta. The head is somewhat 
angularly dilated at the sides behind the eyes, not rounded. 
