{November 1882. BULLETIN BROOKLYN ENTOM. SOC. VOL. V. 51 
decreasing in thickness, the terminal. being conical and terminating in a 
blunt point, the lobes are thick, terminating at tip in a corneous, acute, 
curved process: the inner side being densely set with equal spinules 
rather than hair: the Agw/a is ‘thick, densely set with spine-like hair, a 
small tubercle Searing two longer hairs in the centre, and the two-jointed 
palpi at sides: the legs are short, fleshy, densely set with long strong 
spines, 
The antennz of the | imago are stouter and 
comparatively shorter than in elaphus the club is 
heavier, more compactly set, proportioned as shown in 
figure 2, joint six is dilated at tip and shows an incipi- 
ent pectination; joints 1 to 6 are entirely glabrous, joint 
7 has the prolongation only opaque pubescent, while 
Fig. 2 8 to ro are entirely opaque and pubescent. The Q 
differs in having the 7th joint entirely glabrous, and in the somewhat 
heavier joints of the club. 
3. mazama Lec. (Dorcus) Proc. Ac. Phila. 1861. p. 345. The lab- 
rum of (fis rectangular and about four times broader than long; the 
thorax is distantly punctured and nearly smooth at disc; near the suture 
of elytra are two strixe, obliterated toward apex. 
The ¥\ antennz are still shorter than in dama, the 
joints 1 to 6 glabrous, 6 a little dilated; 7 glabrous at out- 
er side only, prolongation halfas long asin 8 and. opaque 
pubescent, 8 to 10 entirely pubescent, opaque. This spec- 
ies is found in New Mexico, Utah, Arizona. Length 
Fig. 3 24 to 32 mm. 
4. placidus, Say. Journ. Ac. Phila. V, 202. /en/us, Casteln. Hist. nat. 
II, 171. ‘The elytra and the thorax are more distinctly punctured, than 
in any of the other species, heavy mandibles, rectangular at the base and 
only curved at tip while the other species have them more equally round- 
ed; near the middle tooth of mandibles, there are in the {/ three, in the 
Y two smaller ones. Ills., Penn. 25-35 mm. 
In this species the club constitutes half the length 
of the antennze excluding the Ist joint: proportioned 
as shown in fig. 4., joint 6 is dilated at middle on the 
inner side, joint 7 is prolonged inwardly nearly as long 
as 8; 8, gand 10 are opaque pubescent: the terminal 
joint is heavier and shorter than -in any other species: 
Fig. 4 there appears no notable difference between the sexes. 
