a4 HETEROMERA. 
first extending obliquely across the outer face of the tibia, the others shorter; the first joint of the hind 
tarsi with three, the second joint with two, sharp, oblique ridges. 
Length to end of the elytra 33, to tip of the pygidium 33, millim. (<¢.) 
Hab. Mexico, Zacualtipan in Hidalgo (Hége). 
One male example. Very near MV. occidentalis; but differing from the same sex of 
that species by its very elongate antenna, the fifth joint of which is more than twice as 
long as the fourth, the larger and more coarsely faceted eyes, and the piceous thorax. 
The antenne are not so slender as in WM. filicornis (¢ ). 
59. Mordellistena filicornis. (Tab. XV. fig. 14, ¢.) 
Moderately elongate, subparallel, very narrow, pitchy-brown, the head (the eyes excepted), antenne, palpi, and 
prothorax flavo-testaceous, the pygidium reddish at the base ; the pubescence fine, on the elytra brownish- 
cinereous, for the rest partaking of the ground-colour. Head exceedingly convex, the eyes unusually large; 
last joint of the maxillary palpi elongate-triangular ; antenne long, exceedingly slender, filiform, joints 3 and 
4 short, equal, 5 more than twice as long as 4, 5-10 very elongate, equal in width and length, 11 longer 
than 10; prothorax about as long as broad; elytra moderately long, parallel in their basal half; beneath 
reddish-testaceous, the ventral segments 1—4 infuscate; pygidium very elongate, more than twice the 
length of the hypopygium ; legs pale testaceous, the hind pair a little darker, the carine piceous; the 
hind tibise with three ridges—the first extending obliquely across the outer face of the tibia to near the 
base, the others short, subequal; the first joint of the hind tarsi with three, the second joint with two, 
short, oblique ridges. 
Length to end of the elytra 23, to tip of the pygidium 3, millim.; breadth 2 millim. (¢.) 
Hab. GuaTEMALA, Zapote (Champion). 
One male example. Narrower and much smaller than J. occidentalis (3); the 
eyes larger and more coarsely faceted ; the antenne longer, more slender, and entirely 
flavous. ‘The carine on the hind legs are piceous, and, owing to the pale colour of 
these limbs, very prominent. 
60. Mordellistena flavicornis. (Tab. XV. fig. 15.) 
Moderately elongate, subparallel, black, the head (the eyes excepted) reddish-testaceous, the palpi and antennxe 
flavous, the pygidium reddish at the base; finely sericeous-pubescent, the pubescence on the dark parts 
brownish-cinereous, purplish on the elytra in certain lights. Head moderately convex, the eyes large and 
coarsely faceted ; last joint of the maxillary palpi scalene-triangular, moderately long, rather stout; antenne 
short and slender, subfiliform, joints 3 and 4 short, equal, 5 nearly twice as long as 4, 5-10 subequal, 
longer than broad, 11 one half longer than 10; prothorax nearly as long as broad; elytra moderately 
long, subparallel in their basal half; beneath, the head excepted, black, the last ventral segment testa- 
ceous, cinereo-pubescent ; pygidium very elongate ; the anterior legs flavous, the middle legs pitchy-brown, 
the hind legs (the tibial spurs excepted) piceous ; the hind tibiz with three well-defined ridges—the first 
extending across the outer face of the tibia to near the base, the others short, equal in length; the first 
joint of the hind tarsi with three, the second joint with two, oblique, well-defined ridges. 
Length to end of the elytra 24, to tip of the pygidium 34, millim. 
Hab. GuatemMata, Duefias (Champion). 
Two examples, apparently females. Closely allied to M. filicornis, but differing from 
that insect in having the antenne one third shorter, the head less convex, the eyes a 
