234 HETEROMERA. 
Hab. Mexico, Amula, Xucumanatlan, and Chilpancingo in Guerrero (H. H. Smith), 
Cordova (Sallé), Cerro de Plumas (Hoge); GuatemaLa, near the city, San Gerénimo 
(Champion). | 
Var. The head, the prothorax, and the shoulders of the elytra more or less reddish-brown. 
Hab. Muxico, Guanajuato (Sallé, Dugeés). 
Numerous examples of the typical form, three of the variety. The more ovate head, 
the more shining surface, and the much more diffuse punctuation and the sparse 
pubescence of the elytra distinguish this insect at once from A. punctipennis. The 
much less transverse head separates it from A. obscurus, La Ferté, A. occidentalis, and 
other allied forms. The punctuation of the head is fine and rather dense, but in some 
examples is almost obsolete. In a long series of specimens the elytra vary a little in 
the intensity of the punctuation and in the depth of the post-basal depression, this 
latter being scarcely visible in one male example. 
18. Anthicus bactrianus. (Tab. X. figg. 13, ¢; 134, profile.) 
Elongate, black or brownish-black, the head and prothorax in one example pitchy-red, shining ; the head and 
prothorax sparsely, the elytra more thickly, clothed with fine decumbent pubescence, the pubescence on 
the elytra ashy in tint at the base. Head broader than long, moderately convex, rounded at the sides 
behind, thickly and not very finely punctured, the eyes large and prominent; the last joint of the maxil- 
lary palpi very broad; antenne long, very gradually and only a little thickened outwardly, piceous or 
piceous-brown, the basal joints lighter; prothorax much longer than broad, narrower than the head, the 
sides rounded before and very strongly constricted behind the middle and thence to the base almost 
straight, the anterior portion convex, the posterior portion rather long and strongly and abruptly gibbous, 
the flanks with a very deep excavation extending upwards, the base finely margined, the disc thickly 
and finely punctured, the sides smooth; elytra long, subparallel to about the middle, broadly transversely 
depressed below the base and moderately convex beyond this, the basal portion finely and rather densely, 
the rest of the surface more shallowly and sparsely, punctured, the humeri obtuse but somewhat promi- 
nent; legs varying in colour from piceous to fusco-testaceous, the tarsi not lighter than the femora or 
tibiz, the femora distinctly clavate, the spurs of the hind tibie long ; fifth ventral segment truncate, and 
the hind tibie slightly sinuate on the inner side, in the male. 
Length 23-22 millim. (¢ 9.) 
Hab. Mexico, Cerro de Plumas (Hége), Guanajuato (Sallé); GuaTEMALA, Quiche 
Mountains, Capetillo, Santa Rosa in Vera Paz (Champion). 
Nine examples. This insect resembles A. obscurus, La Ferté, and A. nitidulus, Lec., 
from both of which it differs in having the posterior portion of the thorax strongly 
gibbous and raised very much above the level of the convex anterior portion, the space 
between the two very deeply excavate at the sides. No species possessing this peculiarity 
was known to La Ferté. The last joint of the maxillary palpi is largely developed, 
and the spurs of the hind tibiz are very distinct. A. bactrianus appears to be confined 
to Mexico and the highlands of Guatemala ; the following species comes very near it. 
19. ‘Anthicus tumidicollis. 
Closely allied to A. bactrianus. The head much more sparsely and less distinctly punctured, and more shining ; 
the posterior portion of the prothorax less strongly gibbous and not so abruptly raised in front (viewed 
