HETEROMERA. 455 
the rest of the legs piceous; the head and prothorax moderately shining, the elytra opaque. Head 
finely, rather sparsely punctured, densely and minutely so on the vertex, smoother along the middle and 
in front, the front broadly depressed ; eyes large, rather prominent, coarsely granulated ; mandibles long 
and prominent, entire at the apex; last joint of the maxillary palpi elongate, cultriform ; antennee 
scarcely reaching to the middle of the elytra, tapering towards the tip, the apical joint constricted at the 
middle; prothorax longer than broad, much wider at the apex than at the base, flattened on the disc, 
abruptly constricted about the middle and thence to the base narrow and parallel, the sides strongly 
rounded anteriorly, the surface densely, minutely punctured, the disc slightly depressed in the middle 
before the base and with a smooth median line; elytra elongate, subparallel in their basal half, densely, 
shallowly, minutely punctured, with two faint raised lines on the disc; beneath densely, minutely 
punctured. 
Length 73 millim. 
Hab. Mexico, Atoyac in Vera Cruz (Flohr). 
One specimen, apparently a female. This species is not very closely allied to any 
of the other members of the genus described in this work; it resembles Copidita 
trifoveata in colour, from which it may be known by the simple mandibles, shorter 
antennes, flatter thorax, &c. The thorax is considerably dilated anteriorly, narrow 
and parallel behind. 
23 (a). Oxacis cerulea. (Tab. XXI. fig. 5.) 
Elongate, narrow, parallel, above and beneath ceruleous, the elytra bluish-green; the palpi (except at the 
tip) and the antenne black; the legs black, with the femora bluish-green ; the entire upper surface 
moderately shining, sparsely clothed with rather coarse ashy pubescence. Head densely punctured, 
coarsely so between the eyes, the latter only moderately prominent and not very coarsely granulated ; 
mandibles long and prominent, entire and almost pointed at the tip; last joint of the maxillary palpi 
long and cultriform ; antenne elongate, fully reaching the middle of the elytra; prothorax longer than 
broad, rather narrow, slightly wider in front than at the base, the sides a little rounded anteriorly and 
gradually converging from about the middle to the base, the entire surface densely, somewhat coarsely 
punctured, the disc without distinct depression or median line; elytra parallel to beyond the middle, 
densely, confluently punctured, the punctures a little shallower than those on the prothorax, the dise 
without raised lines ; beneath densely and finely, the flanks of the prothorax coarsely, punctate. 
Length 52 millim. » Gy, , 8 Be 
aa az 0 Ch aw THA Afgan of o 
Chama pro , nee AUP BILEM Un RMA Dore Sox 
Hab. Mexico, Chinautla (Flohr). cl oss NG: 
One specimen. Allied to O. schistacea, Kirsch, but differing from it in the much 
coarser punctuation of the upper surface, and in the dark antenne and legs. It 
approaches Piras nasalis, but has less depressed eyes, a shorter head, &c. 
XYLOPHILUS (p. 166). 
Since the publication of the preceding pages, Mr. Flohr has paid especial attention 
to this genus in Mexico, his investigations resulting in the discovery of numerous 
interesting new species. He informs me that all his specimens have been beaten 
from oak trees, especially those with large leaves. Xylophilus, so extraordinarily rich 
in species within our limits, is one of the most interesting genera that I have had to 
deal with in this work. 
