cn 
bo 
2 
MAMACTES. 
1. Meemactes ruficornis. (Tab. XXVI. figg. 11, lla, ¢.) 
Memactes ruficornis, Boh. in Schénh. Gen. Cure. iv. p. 277°. 
Memactes cribricollis, Deyr. 1 litt.’ 
Hab. Mexico (Chevrolat'), Sierra de Durango (ex coll. Flohr), Puebla, Matamoros 
Izucar, Capulalpam (Sallé), Toluca (Sallé, Hoge), Salazar, Tula, Mexico city, Cerro de 
Plumas, Oaxaca (L[ége). 
Sent us in numbers by Hége. The sculpture of the upper surface (as in certain 
species of Tyloderma) is very variable in this insect, the prothoracic punctures being 
sometimes small and sometimes very large and foveiform (M. cribricollis, Deyr.), and 
those of the elytral series varying much in size and number. The male has the first 
two ventral segments broadly depressed down the middle, and the fifth slightly 
hollowed at the apex, leaving the pygidium a little more exposed than in the female. 
‘The pubescence is very short and inconspicuous, and easily abraded. The intermediate 
and posterior femora only are distinctly dentate. 
2. Mzmactes pilosus, sp. n. 
Elongate-oval, somewhat depressed, shining, black, the legs piceous, the antenne and the tips of the tarsi 
ferruginous ; sparsely, uniformly clothed with short, fine, curled, ochreous pubescence, each puncture 
bearing a separate hair. Head thickly punctate, shallowly, transversely grooved between the eyes, which 
are small and widely separated; rostrum very coarsely punctate and longitudinally rugose at the base, 
thickly punctate at the tip. Prothorax about as long as broad, somewhat rounded at the sides, a little 
narrowed in front; closely, very coarsely punctate. Scutellum minute. LElytra oblong-ovai, at the 
base a little wider than the base of the prothorax; punctate-striate, the punctures large, subquadrate, 
and closely placed, the interstices narrow, rather convex, uniseriate-punctate, and more or less reticulate, 
3, 5, and 7 subcostate. Beneath very coarsely punctate. Intermediate and posterior femora dentate ; 
all the tibiee sharply mucronate at the inner apical angle. 
Length 6, breadth 24 millim. (d.) 
Hab. Mexico, Cuernavaca (Sallé, Hoge). 
Two specimens. More elongate and more depressed than MM. rujficornis, the 
pubescence longer and subsetiform, the elytra with series of subquadrate punctures, 
separated by narrow, raised, reticulate interstices. 
3. Mamactes perforatus, sp. n. 
Oblong-ovate, shining, black, the antenne and the tips of the tarsi obscure ferruginous; clothed with 
scattered, stiff, decumbent, light and dark sete intermixed with a few ochreous scales. Head rather 
sparsely punctate, the eyes large and approximate, the narrow interocular space smooth and polished in 
one specimen; rostrum foveolate and longitudinally wrinkled at the base, the apical half sparsely, 
finely punctate. Prothorax a little broader than long, rounded at the sides, narrowed and feebly 
constricted in front; very coarsely, closely punctate, except along a narrow, irregular, smooth space 
down the middle. Scutellum minute. Elytra oblong-oval, at the base a little wider than the base of 
the prothorax ; with rows of large, approximate, subquadrate punctures placed in shallow striw, the 
interstices narrow, more or less raised, subreticulate, uniseriate-punctate. Beneath very coarsely 
punctate. Ventral segments 1 and 2 broadly depressed down the middle. Anterior and intermediate 
femora feebly, and the posterior femora sharply, dentate. Posterior tibize mucronate at the inuer apical 
angle. 
Length 6-64, breadth 23-3 millim. (<¢.) 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 4, October 1909. 3 YY 
