200 HETEROMERA. 
slender, and the basilar groove of the thorax deeper. The apical joint of the antennz 
is about half as long again as the tenth in both sexes. 
5. Macratria parallela. (Tab. IX. fig. 10, 3.) 
Black, the head reddish in front, slightly shining, thickly clothed with rather coarse brownish pubescence and 
with scattered erect hairs. Head densely but not very finely punctured, somewhat rounded at the sides 
behind the eyes, the occipital channel short but distinct; eyes moderately large, not prominent; antenne 
(d) comparatively long, extending a little beyond the base of the prothorax, black, joints 1-4 and 11 at 
the extreme tip more or less testaceous, joints 2-8 slender, 3 distinctly longer and more slender than 2, 9 
and 10 triangular and longer and wider than 8, 11 three and a half times as long as 10; prothorax about 
twice as long as broad, not wider than the head, the sides moderately rounded anteriorly and converging 
behind, the basilar groove deep and extending completely across, the surface very densely and roughly 
punctured ; elytra subparallel (the sides, however, slightly converging from the base), 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 densely and somewhat roughly 
punctured, the base and sutural region impressed with coarser punctures (as coarse as those of the strie), 
the apices rounded; beneath coloured as above, very densely punctured and pubescent ; legs comparatively 
slender, rather long, the femora moderately clavate, piceous, the knees, the base of the femora, and the 
tarsi (except the basal joints of the hind pair) more or less reddish or testaceous ; fifth dorsal segment 
truncate and emarginate in the male. 
Length 5-54 millim. (<¢.) 
Hab. Panama, Volcan de Chiriqui 4000 feet (Champion). 
Three examples, all males. The duller and more densely and less finely punctured 
head distinguishes this species from the following, to which it is very closely allied ; 
the much longer apical joint of the antenne (in the male) and the denser punctuation 
of the head separate it from MV. rujfifrons. | 
6. Macratria nitidiceps. 
Closely allied to and of the general form of M. parallela. The head indeterminately reddish or testaceous in 
front, less densely and more finely punctured, almost smooth behind, shining; the antenne black, the 
three or four basal joints and the extreme tip of the apical one usually testaceous, sometimes with only 
the two basal joints lighter, joint 3 very little longer than 2, 9 and 10 triangular, longer and wider than 
8, 11 in the male fully three times, in the female twice, as long as 10; the prothorax and elytra as in 
M. parallela; the legs in some specimens almost entirely piceous, in others testaceous or flavo-testaceous 
with the knees, tibia, and tarsi piceous-brown or brownish; the fifth ventral and fifth dorsal segments 
truncate at the apex in the male, rounded in the female. 
Length 43-53 millim. (¢ 9.) 
Hab. Muxtco, Coscomatepec, Juquila, Cordova (Sallé), Cerro de Plumas, Jalapa 
(Hoge). 
Numerous examples. In this insect the head is more sparsely and more finely 
punctured than in any other of the Central-American representatives of the genus. 
7. Macratria rufifrons. 
Closely allied to M. parallela, and differing as follows:—The head shining, less densely but somewhat coarsely 
punctured, the anterior half reddish; the antenne black, with the four basal joints and the tip of the 
eleventh testaceous, joints 9 and 10 triangular, longer and wider than 8, 11 in the male two and a half 
