NOTOXUS. 211 
predominance of the piceous or of the testaceous colour, though the same general 
-pattern is visible in all the specimens ; the oblique depression is deep in both sexes ; 
the erect hairs are long and rather numerous; and the pubescence partakes very much 
of the colour of the surface from which it arises. 
This insect appears to be peculiar to the Los Altos region of Guatemala; a male 
example of a closely allied, but apparently distinct, species, from Chinautla, Guatemala 
(Salvin), comes very near to it; but this latter, unfortunately, has lost its head and 
thorax. 
11. Notoxus hirsutus. (Tab. IX. figg. 20, 20 a, 2 .) 
Elongate, parallel, densely clothed with very coarse decumbent pubescence and very long erect hairs; the head 
and prothorax reddish-testaceous, the latter with the sides broadly infuscate; the elytra testaceous, with 
a small spot on either side of the suture at the base, a median fascia (formed by two oblong spots on each 
elytron, one at the suture and one on the disc lower down, the four together forming an interrupted 
inverted V), a narrow ill-defined transverse band some distance before the apex, .and the sides below the 
shoulders indeterminately, piceous. Head thickly and finely punctured, dull, the front concave ; pro- 
thorax about as long as broad, densely and rugosely punctured, opaque—the horn ( @ ) very large and 
broad, narrowing behind, granulate within, with four very coarse blunt teeth on each side, the sides a 
little raised and the tip obtuse, the crest strongly and abruptly raised, sharply carinate in the middle, and 
with the margins crenulate and sharply raised to the tip; elytra long and parallel, very closely and some- 
what coarsely punctured, the punctures finer towards the apex, rather shining, the usual oblique depression 
below the shoulders strongly impressed, the humeri distinct, the apices conjointly rounded and somewhat 
obtuse, the sutural angles rather sharp; beneath fusco-testaceous ; legs and antenne testaceous, the knees 
a little darker. 
Length 44 millim. ( 9.) 
Hab. Mexico, Presidio de Mazatlan (forrer). 
The thoracic horn (fig. 20 a) in this insect is larger and more coarsely serrate at the 
sides than in any other of the Central-American species. The pubescence is also very 
coarse and dense, and the erect intermixed hairs long and numerous. The elytra are — 
parallel in their basal half; the median fascia is formed of two oblong confluent spots 
on each elytron, one at the suture and one on the disc lower down; the other mark- 
ings are less distinct. The thorax is opaque and densely and rugosely punctured. The 
still coarser pubescence, the form of the horn, and the elytral markings distinguish 
N. hirsutus from N. mexicanus &c. 
12. Notoxus calcaratus. (Tab. IX. figg. 21, 21a, 2.) 
Notoxus calcaratus, Horn, Trans. Am. Ent. Soc. xi. p. 170°. 
Hab. Nortu America, Nevada, Arizona, Texas, and Lower California —Muxrxico, 
Northern Sonora (Morrison). 
Sent to us in abundance by Morrison. In this species the anterior tibie of the male 
are furnished with a triangular tooth on the inner side at the middle; the elytra have a 
spot on either side of the suture just below the base, a transverse subangulate median 
band, and the apex, black or piceous; the upper surface is thickly clothed with coarse 
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