MACRATRIA. 199 
coloured as above, very densely punctured and pubescent; legs stout (the femora much thickened towards 
the apex), the front and middle pairs flavo-testaceous or testaceous with the base of the tibie piceous and 
sometimes the apices of the femora brownish, the hind pair piceous or piceous-brown with the knees and 
the tips of the tarsi testaceous (in one example the four anterior femora are in great part piceous, in others 
the hind tibiz are testaceous, except at the apex). 
3. Fifth ventral segment broadly truncate at the apex, the apical margin feebly bisinuate (fig. 8a); the 
corresponding dorsal segment very shallowly and broadly emarginate at the apex. 
9. Fifth ventral segment deeply triangularly emarginate (fig. 9); the corresponding dorsal segment furnished 
with a projecting piece in the middle, and angularly extended on either side (the apical margin thus 
appearing tridentate) (fig. 9 a). 
Length 4-53 millim. (¢ 9.) 
Hab. Mxxico, Atoyac, Teapa (H. H. Smith); Guatemaua, Teleman and San Gerdénimo 
in Vera Paz (Champion). 
Apparently not uncommon in South-eastern Mexico and Eastern Guatemala. This 
species is densely pubescent, and varies considerably in size, and also in the colour of 
the legs and antennz. ‘The less parallel shape, shorter apical joint of the antenne, 
and still more finely punctured elytral interstices distinguish it easily from the 
N.-American VM. murina. From the Colombian WV. sericea, La Ferté (to judge from 
the description), it differs in the less parallel shape, the shorter third joint of the 
antenne (it being only a little longer than the second), duller elytral interstices, &c. 
In the male the sixth ventral segment is furnished on either side with two long, 
straight, slender processes which are clothed with long hairs at the tip (fig. 85), the 
corresponding dorsal segment being divided down the middle into two pieces which 
are pointed and somewhat hooked at the end (the tips often visible beyond the end of 
the body in dried specimens *); and the central sheath of the cedeagus has an accom- 
panying long, flattened piece on either side (forming part of the tubular piece enclosing 
the central sheath), the ends of which are abruptly truncate, bent inwards, and some- 
what hooked within (fig. 8 ¢). 
4. Macratria tropicalis. 
Pitchy-black or obscure reddish-brown, the head paler in front, the disc of the elytra brownish; the occipital 
channel short and deep, not extending upwards; antenne testaceous, formed as in MM. incana; palpi 
testaceous; prothorax, elytra, and legs as in M. incana, the legs equally variable in colour; fifth dorsal 
segment arcuate-emarginate at the apex in the male, rounded and entire in the female. 
Length 43-53 millim. (¢ 9.) 
Hab. Guatemata, Panzos (Conradt), Teleman (Champion). 
One male from Teleman and two female examples from Panzos. Except for the 
different form of the fifth dorsal segment in the female, this insect is so closely allied 
to UM. incana as to be scarcely separable from it; the occipital channel of the head is, 
however, deeper in both sexes. The single male, which is somewhat doubtfully 
referred to the same species, is much smaller in size, and has the antenne more 
* Similar projecting pieces are visible in one of the three dried male specimens of MV. murina now before me. 
