208 HETEROMERA. 
triangular mark darker in colour in one example, but its shape well defined by whitish pubescence). 
Head finely and rather thickly punctured, finely pubescent, with a few short erect hairs in front, 
the front flat or slightly concave; prothorax broader than long, sparsely and finely punctured, slightly 
shining—the horn(<) long and subparallel, rather narrow, oval at the tip, distinctly margined, the 
sides not or very feebly serrate, the crest moderately raised, considerably narrower than the horn, and 
sharply margined; elytra subparallel, moderately long, shining, closely and finely punctured, the usual 
oblique depression below the shoulders shallow, the humeri distinct, the apices conjointly rounded ; 
beneath piceous ; legs testaceous or fusco-testaceous, the femora piceous in one example ; antennz testa- 
ceous or ferruginous, with the outer joints a little darker; fifth ventral segment with a deep triangular 
excavation at the apex, and the apex a little emarginate, in the male. 
Length 3-33 millim. (<.) 
Hab. Mexico, Guanajuato (Sallé), Jalapa (Hoge). 
Two male examples. In the deep triangular excavation of the fifth ventral segment 
in the male and in the fine and entirely decumbent pubescence this species resembles 
the North-American V. nuperus, Horn; the elytra, however, are differently marked and 
shining (not opaque), and the triangular excavation of the fifth ventral segment does not 
extend to the tip of the preceding segment *. The large triangular whitish-pubescent 
antemedian lateral patch and the narrow W-skaped similarly pubescent postmedian fascia 
of the elytra are characteristic of this species, these whitish-pubescent markings being 
present in both examples, though in one the testaceous colour is partly obliterated. 
In the British-Museum collection there is a mutilated specimen of a Notorus from 
Mexico which is perhaps referable to this species (or it may prove to be the other sex 
of NV. truncatipennis) ; it has the thoracic horn and crest similarly shaped, but the post- 
basal depression ot the elytra is very deep and the apices of the latter are somewhat 
oblique and the sutural angle a little produced. Additional specimens of this and of 
the following two species are much required, not only to determine the sexual marks 
of distinction, but to show the amount of variation to which each is subject. 
7. Notoxus fraternus. 
Elongate, subparallel, piceous, shining, somewhat thickly clothed with moderately coarse decumbent hairs and 
with scattered, more erect, serially arranged, rather longer hairs intermixed; the prothorax with the 
extreme base, and in one example the horn and the sides and apex also, rufous; the elytra in one example 
with a transverse testaceous patch on the middle of the disc towards the apex, in the other with a small 
reddish spot on the disc before the middle, for the rest entirely piceous, a large, lateral, triangular, 
antemedian patch and a postmedian transverse fascia (the ground-colour of which is partly testaceous in one 
example) clothed with whitish pubescence, the rest of the surface with brownish pubescence. Head sparsely 
and minutely punctured, finely pubescent, with a few short erect hairs in front, the front slightly concave 
in the middle; prothorax broader than long, finely and not very closely punctured—the horn (¢ ) rather 
narrow, moderately long, parallel, finely margined to the tip, the tip rounded, the sides not serrate, the 
crest moderately or very little raised, finely margined, narrowing from the base ; elytra rather long, 
subparallel, finely and closely punctured, the punctuation finer towards the apex, the usual oblique 
depression below the shoulders very shallow, the humeri distinct, the apices ( $) separately rounded ; 
beneath, the prothorax excepted, piceous; antenne testaceous with the apical joints piceous-brown, or 
* Examples of N. nuperus, Horn, were found by Morrison in Arizona, just beyond our northern 
boundary. 
