MACRATRIA. 197 
confluently punctured ; elytra subparallel in their basal half, and thence very gradually narrowing to 
the apex, very densely and minutely punctured, with indistinct irregular rows of coarser punctures on 
the disc extending from the base to beyond the middle (the punctures separated from each other by some- 
what granular elevations) and a fine sharp raised line extending from the shoulders nearly to the apex, 
the sculpture becoming a little coarser and more granular towards the base, the apices sharp ; beneath 
ferruginous, the meso- and metasternum darker, very densely punctured and pubescent ; legs (including 
the tarsi) very stout, the femora much thickened outwardly, ferruginous, the tibie darker at the base; 
the first joint of the front and middle tarsi exceedingly stout, concave beneath, that of the hind pair stout 
and longer than the following joints united. . 
2. Fifth dorsal segment divided in the centre from the base to the apex ; sixth ventral segment at the apex in the 
middle with a lanciform projecting piece which is fringed with hairs at the tip (fig. 7a), this segment also 
furnished on either side behind with a long and narrow chitinous converging appendage, the tip of the latter 
abruptly truncate and ciliate, and meeting the apex of the opposite one above the central piece (fig. 7 5). 
Length 54-7 millim. (9.) 
Hab. Muxtco, Ventanas in Durango (Forrer); Guatemata, Panzos (Champion). 
Two specimens from Panzos and one from Ventanas, all females. These examples 
agree so nearly with La Ferté’s description and figures of M. goudotiw from Colombia 
(which is based upon a single male example), that I, at first, identified them with it; 
there is, however, in Mr. F. Bates’s collection a male example, from HEga, of a 
Macratria which agrees still more closely with La Ferté’s figure; this last-mentioned 
specimen has the apices of the elytra separately rounded (the form of the sutural 
angle is, unfortunately, not mentioned in the description), while in M. princeps they 
are rather sharp*. If this determination is correct, M. princeps differs from M. goudotii 
not only in this respect, but in its more robust form, rather longer apical joint of the 
antenne, stouter and more ferruginous legs, wider thorax, and still more coarsely 
granulated eyes. The lanciform projection at the apex of the terminal segment of the 
female, at first sight, resembles the central sheath of the cedeagus of the male, for which 
it might easily be mistaken. The short, broad head, large, oblique, and very coarsely 
granulated eyes, stout legs (the tarsi included), comparatively broad form, large size, &c. 
separate IM. princeps from all the following species. The irregular rows of punctures 
on the elytra are scarcely distinguishable through the pubescence, and the punctures 
are separated one from another by somewhat granular elevations which become coarser 
towards the base. The thorax has the flanks somewhat hollowed out, the lateral limits 
being more sharply marked than in any of our other species, except I. canescens. ‘The 
Mexican example is much larger than those from Guatemala. 
2. Macratria canescens. 
Black, the head reddish in front, the labrum paler, subopaque, very densely clothed with yellowish-grey silky 
pubescence, and with scattered erect hairs. Head moderately large, very densely and somewhat roughly 
punctured, slightly shining, the space behind the eyes broad and rounded laterally, the occipital channel 
short but distinct; eyes comparatively small, moderately prominent, not very coarsely granulated ; palpi 
——— 
* As the Cuban WM. insularis seems to be chiefly distinguished by the acuminate sutural angle, it is not likely 
that La Ferté could have overlooked a similar character in M. goudoti. 
