NOTOXUS. 209 
almost entirely piceous ; legs testaceous with the femora darker, the femora and the tarsi (the basal joint 
excepted) piceous in one example; fifth ventral segment transversely concave in the middle behind, and 
the apex truncate in the male. 
Length 3 millim. (¢.) 
Hab. Mexico, Guanajuato (Sallé), Jalapa (Hoge). 
Two examples, both males. The Jalapa specimen is abraded and darker in colour, 
and has the elytra a little more finely punctured and the thoracic horn more distinctly 
margined at the tip; in the separately rounded apices of the elytra and in the form of 
the fifth ventral segment in the male it agrees well with the one from Guanajuato *. 
The shorter thoracic horn and the less distinctly margined crest, the separately rounded 
apices and the non-angulated post-median fascia of the elytra, and the transversely con- 
cave (not triangularly foveate) fifth ventral segment distinguish it from the same sex 
of NV. ventralis, an insect occurring at the same localities; the thoracic crest is narrowed 
from the base in NV. fraternus, in N. ventralis it is more oval in shape. Labelled 
NV. fraternus, E. Dugés, in the Sallé collection. 
Apparently allied to the North-American JV. talpa, La Ferté. 
8. Notoxus truncatipennis. 
Elongate, subparallel, piceous, shining, somewhat thickly clothed with moderately coarse decumbent hairs and 
with scattered, more erect, rather longer hairs intermixed; the prothoracic horn rufous; the elytra with 
a transverse narrow fascia on the middle of the disc towards the apex, and in one example also the sides 
below the shoulders, reddish-testaceous, for the rest entirely piceous, a large, triangular, lateral, ante- 
median patch and a postmedian transverse fascia (the ground-colour of which is partly testaceous) clothed 
with whitish pubescence, the rest of the surface with brownish pubescence. Head comparatively large 
and broad, closely and finely punctured, finely pubescent, with a few erect hairs in front, the front flat ; 
prothorax broad and transverse, densely and somewhat coarsely punctured—the horn (2) long and 
large, oval, finely margined to the tip, the sides not serrate, the crest moderately raised, finely margined, 
narrowing from the base ; elytra long and subparallel, closely and rather coarsely punctured, the punctu- 
ation finer towards the apex, the humeri distinct, the usual oblique depression below the shoulders shallow, 
the apices (2) broadly and abruptly truncate; beneath piceous; antenne ferruginous, with the apical 
joints piceous ; legs reddish-testaceous, the femora infuscate or piceous. 
Length 34 millim. (9.) 
Hab. Mexico, Guanajuato (Sallé). 
Two worn examples, both females. Also labelled WV. fraternus, EK. Dugés, in the 
Sallé collection. It cannot possibly, however, be the female of the species here 
described under that name, the difference in the size and shape of the thoracic horn 
being more than sexual; the head and thorax are also considerably broader; and the 
thorax is densely and more coarsely punctured (the punctuation in WV. fraternus is 
fine and rather sparse). ‘The thoracic horn is long and largely developed; the crest is 
moderately raised, finely margined at the sides, without central carina. WV. truncati- 
pennis is the only Central-American species known as yet with abruptly truncate elytra 
in the female sex; JV. talpa, La Ferté, possesses a similar peculiarity. 
* In Herr Hoge’s collection there is a female example of a Notoxus, from Ciudad in Durango, allied to this : 
it comes nearer, however, to the North-American J. bifasciatus, La Ferté. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 2, August 1890. 9EE 
