ARGOPORIS. _ 96 
tate ; elytra rounded at the sides, rather short, a little narrowed towards the base, the humeri thickened 
and prominent, rather coarsely punctate-striate, the interstices flat and almost impunctate, the sutural 
distinctly, and the third feebly, raised and costate just before the apex; legs and antenne reddish brown 
or black; antenne long and stout, widening outwardly, the last four joints strongly transverse. In the 
male the anterior tibie are rather coarsely, and the intermediate and posterior tibie finely, denticulate 
within; the anterior femora with a short stout blunt tooth near the middle, the posterior femora strongly 
swollen in the middle and with about four short stout teeth. 
Length 93-123 millim. (¢ 9.) 
Hab. Mexico (coll. F. Bates), Ventanas 2000 feet, Presidio, San Blas (Forrer). 
Allied to A. cavifrons, which it resembles in the coarsely punctured intraocular 
region of the head, but readily separated therefrom by the characters given above. A 
female from Presidio and another of the same sex in Mr. F. Bates’s collection differ 
from the others in being smaller, the thorax narrower, and the legs and antenne not 
quite so stout. 
5. Argoporis atripes. (Tab. V. fig. 4, ¢.) 
Argoporis atripes, Horn, Rev. Ten. N. A. p. 325 (desc. nulla) (2). 
Black, shining, moderately convex. Head closely and finely punctured, the epistoma smoother ; prothorax 
about as long as broad, moderately convex, the sides feebly rounded, slightly narrowed towards the base, 
widest about (or a little before) the middle, the disc flattened or impressed before the base, smooth, or 
almost imperceptibly punctured ; elytra elongate, slightly flattened on the dise, feebly rounded at the 
sides, a little narrowed at the base, the humeri prominent, rather coarsely punctate-striate, the interstices 
slightly raised and costate just before the apex, flat for the rest of their length, almost imperceptibly 
punctured, and sometimes feebly wrinkled transversely along the suture; legs and antenne black. In 
the male the tibie feebly denticulate within; anterior femora much swollen, and with a feeble broad 
blunt tooth on the inner side near the base; posterior femora slightly swollen in the middle, and with 
about four short teeth (somewhat distantly placed one from the other), the inner one the stoutest. 
Length 12-13 millim. (¢ @.) 
Hab. Mexico ! (coll. F. Bates), Hacienda de Bleados, San Luis Potosi (Dr. Palmer). 
Guanajuato (Sallé). 
Many specimens. 
6. Argoporis cavifrons. (Tab. V. fig. 5, 3.) 
Dull black, convex, scarcely shining. Head coarsely and closely punctured between the eyes, the epistoma 
smoother and sharply defined posteriorly; prothorax convex, rather narrow, about as long as broad, the 
sides rounded and equally narrowed at the base and apex, widest in the middle, smooth or exceedingly 
finely and closely punctured; elytra of an elliptic form, convex, the sides rounded and strongly narrowed 
towards the base, widest in the middle, the humeri fine and dentiform, finely punctate-striate, the 
interstices almost smooth, the sutural obliquely, the third feebly, and the seventh distinctly raised and 
costate just before the apex, flat for the rest of their length; legs and antenne black. In the male the 
tibia are very feebly denticulate within ; posterior femora slightly swollen in the middle, with three or 
four short teeth ; anterior femora with a short blunt tooth near the base. 
Length 11-12 millim. (¢.) 
Hab. Mexico, Presidio, Ventanas (forrer). 
Three male examples. Allied to A. atripes, and the posterior femora in the male 
