528 RHYNCHOPHORA. 
Hab. Nortu Amenica!*, New Jersey, Pennsylvania, Iowa, and Georgia ®, New 
York to Texas °.—Norta Mexico, Chihuahua city (//0¢e). 
The single specimen received from Chihuahua agrees perfectly with others from 
Iowa given us by Mr. Wickham. 
2, Tyloderma baridium. 
Tyloderma baridium, Lec. Proc. Am. Phil. Soc. xv. p. 249°. 
Tyloderma baridia, Casey, Journ. N. York Acad. Sci. vi. p. 455 *. 
Hab. Norta America!, Indiana and Illinois?.—Mexico (Sallé), Nuevo Laredo, 
Toluca (Hoge). 
We possess six specimens of this species, four of which are from the northern 
frontier of Mexico. The male has the first ventral segment broadly depressed down 
the middle, a character also to be found in the same sex of certain Memactes. 
8. Tyloderma eneotinctum, sp.n. (Tab. XXVI. figg. 10, 10a.) 
Oblong, narrow, convex, shining, rufo-piceous, with an eneous lustre, the elytra in one specimen with 
indications of a broad reddish subapical fascia, the antenne ferruginous; very sparsely clothed 
with yellowish-white pubescence, which is clustered into small scattered patches on the elytra. 
Head and rostrum rather closely punctate, the head transversely depressed between the eyes, the 
front foveate. Prothorax a little longer than broad, narrowing from the middle forwards, feebly 
constricted before the apex; sparsely, very finely punctate. Elytra rather long, much wider than the 
prothorax, subparallel in their basal fourth and rapidly narrowing thence to the tip, which is somewhat 
pointed, the humeri rounded ; coarsely seriate-punctate, striate near the suture, the punctures becoming 
obsolete and placed in deep striz towards the apex, the interstices almost smooth, convex at least on the 
apical declivity. Metasternum and the base and tip of the abdomen coarsely, and the rest of the latter 
very sparsely and minutely, punctate. Legs long and slender. 
Length 43-43, breadth 14 millim. 
Hab. Muxico, Vera Cruz (Sallé); Guaremaua, Panzos (Conradt). 
Two specimens. A near ally of 7. (Analcis) striatum, Pasc., from Minas Geraes. 
MAMACTES. 
Memactes, Schéuherr, Gen. Cure. iv. p. 276 (1837) ; Lacordaire, Gen. Col. vii. p. 115. 
? Baropsis, Leconte, Proc. Am. Phil. Soc. xv. p. 258 (1876). 
To the characters given for Memactes it may be added that the short pygidium is 
ventrally exposed in both sexes; the episterna are narrow and imperfectly separated 
from the metasternum ; the elytra have the outer (tenth) row of punctures short; the 
femora are dentate, but the tooth on the anterior pair is sometimes obsolete; the tibie 
are short and compressed, strongly unguiculate at the outer apical angle, the posterior 
pair at least mucronate at the inner angle, the anterior and intermediate pairs sinuate 
within, the intermediate and posterior pairs with a row of short stiff cilia on the outer 
edge at the apex. 
Four species are now known from Mexico or Guatemala, and the genus probably 
extends into the Southern United States. 
