256 HETEROMERA. 
7. Acropteron longipenne. (Tab. XI. fig. 15, 3 .) 
Rather long and narrow, greenish-bronze, very shining. Head irregularly, coarsely, and not very closely 
punctured, a rather large, somewhat flattened space in the centre of the vertex almost impunctate, mode- 
rately deeply excavate in front; antennz very long, ferruginous, the basal half of each joint more or less 
infuscate ; prothorax broader than long, the anterior angles broadly rounded, the posterior angles acutely 
produced, the base very feebly emarginate before the scutellum, the basal fovez shallow, the disc slightly 
flattened anteriorly and broadly, transversely, and shallowly impressed behind, the surface rather coarsely 
and somewhat closely punctured, a narrow ill-defined longitudinal space on the disc almost impunctate ; 
elytra very long, rather narrow, narrowing from the base, with rows of comparatively coarse punctures, 
the terminal spines short; legs smooth, sparingly and shallowly punctured, greenish-bronze, the basal two 
thirds of the tibie, the knees, and the tarsi more or less, reddish-ferruginous ; posterior tibize with a broad 
short, subtriangular tooth on the inner side some distance beyond the middle, followed by a shallow 
rounded emargination, thence to the apex widened, and the femora fringed with short hairs beneath, in 
the male. 
Length 114 millim. ( 3.) 
Hab. Guatemaa, Capetillo (Champion). 
One example. A comparatively long, narrow species, not very closely allied to any 
other described here. 
8. Acropteron mexicanum. (Tab. XI. fig. 16, ¢.) 
Rather broad, dark reddish-brown, not very shining. Head coarsely and confluently punctured, the epistoma 
and vertex more sparingly so, a large shallow rounded impression on the latter, the frontal excavation 
moderately deep ; antenne long, ferruginous ; prothorax broad, the anterior angles broad and rounded, the 
posterior angles subacutely produced, the base shallowly emarginate before the scutellum, the basal foves 
short but deep, the disc broadly, shallowly, transversely impressed before the base, the surface coarsely 
and closely punctured, the posterior half of the disc rather more sparingly so, reddish-brown, suffused with 
piceous ; elytra broad, very gradually narrowing from the base, with rows of comparatively coarse punc- 
tures, dark castaneous, the terminal spines acutely and narrowly produced ; legs reddish-brown, the femora 
almost smooth, the tibie shallowly punctured, the tarsi thickly clothed with fine silky hair beneath ; 
posterior tibie sinuous and unarmed, the four anterior tibize clothed with fine silky hair on the inner side 
from the middle to the apex, and the femora and trochanters clothed with short hair beneath, in the male; 
beneath reddish-brown, slightly tinged with eneous, rather dull. 
Length 122 millim. (¢.) 
Hab. Mexico, Santecomapan (Sallé). 
One example. This species will be known by its dark reddish-brown colour, compa- 
ratively broad form, closely and coarsely puactured thorax, and male characters; the 
tarsi very thickly clothed with silky hair beneath. 
9. Acropteron puncticolle. 
Brownish-bronze, not very shining. Head including the vertex coarsely, very closely, and subconfluently 
punctured, the transverse excavation moderately deep, a shallow fovea on the vertex; antenne piceous, 
the basal joint and the apical one ferruginous; prothorax transverse, the anterior angles slightly produced 
and obtuse, the posterior angles acute, the dise broadly, shallowly, transversely impressed behind, the base 
shallowly emarginate before the scutellum, the basal fovese deep, the surface somewhat coarsely, closely, 
and subconfluently punctured, the punctures not quite so closely placed on the disc; elytra narrowing 
from the base, with rows of comparatively coarse punctures, the terminal spines short; legs closely and 
coarsely, the tibiz rough and rugosely, punctured, brownish-bronze, the basal halves of the tibiee more or 
less ferruginous ; posterior tibie slightly sinuous, and unarmed within (scarcely differing from those of the 
