MACRATRIA. 201 
times, in the female not quite twice, the length of 10; prothorax, elytra, and legs as in M. parallela; 
fifth dorsal segment ( ¢) very broadly truncate at the apex. 
Length 5-6 millim. (¢ 2.) 
Hab. Guatema.a, San Gerénimo, Sinanja (Champion). 
Two examples. Very closely allied to YM. parallela and M. nitidiceps. The punc- 
tuation of the head is coarser and closer than in the latter, but not so dense as in the 
former ; the apical joint of the antenne in the male is shorter than in either of these 
species, it being only a little longer than in the female of M/. nitidiceps. 
8. Macratria guatemalena. 
Black, the head reddish in front, the labrum testaceous, slightly shining, thickly clothed with brownish pube- 
scence and with scattered erect hairs. Head densely and finely punctured, somewhat rounded at the 
sides behind the eyes, the occipital channel deep; eyes moderately large, not very prominent ; palpi 
testaceous, the last joint of the maxillary pair sometimes darker; antenne testaceous, with the three 
outer joints darker (in one example the tip of the eleventh only slightly infuscate), slender, joint 2 not 
much shorter than 8, joints 9 and 10 triangular and each much longer and wider than 8, 11 in both 
sexes nearly equal to 9 and 10 united; prothorax about one and a half times as long as broad, not wider 
than the head, the sides moderately rounded anteriorly and constricted behind, the groove on either side 
of the base deep, the surface very densely and roughly punctured ; elytra parallel, with somewhat regular 
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 scutellar region impressed with coarser punctures (similar to those of the strie), 
the apices rounded ; legs rather long and slender, the femora moderately clavate, testaceous, with the 
knees and the base of the femora of the two anterior pairs and the hind pair in great part piceous; fifth 
dorsal segment ( ¢ ) truncate at the apex. 
Length 43-5 millim. (¢ 2.) 
Hab. Guatema.a, Cubilguitz, Capetillo (Champion). 
Three examples. This insect closely resembles UZ. parallela, M. nitidiceps, and 
M. rujfifrons, but differs from all these in the much shorter apical joint of the antenne 
in the male; this joint is similarly formed in both sexes, and not quite twice the length 
of the preceding one. The female so closely resembles that sex of MZ. rujifrons that it 
can only be distinguished by the rather more densely punctured head and the darker 
anterior and middle legs. The description is taken from a pair from Cubilguitz; the 
single female from Capetillo has the five outer joints of the antenne dark, and also 
differs in some other particulars. 
The North-American M/. confusa, Lec., is apparently an allied species. 
9. Macratria crassicornis. 
Black, the head dark reddish-brown, the labrum testaceous, rather shining, thickly clothed with fine, silky, 
brown pubescence and with scattered semierect hairs. Head thickly and rather coarsely punctured, some- 
what rounded at the sides behind the eyes, the occipital channel short. but deep; eyes moderately large, 
not very prominent ; last joint of the maxillary palpi piceous, the other joints testaceous; antenne (¢ ) 
entirely black, stout, gradually widening outwardly, joints 9 and 10 triangular and each considerably 
longer and wider than 8, 11 twice as long as 10 and pointed; prothorax one and a half times as long as 
broad, not wider than the head, the sides moderately rounded anteriorly and converging behind, the basilar 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 2, Augus¢ 1890. 20D 
