344 HETEROMERA. 
the third (subapical) very short; the first joint of the hind tarsi with three, the second joint with two, 
oblique ridges. 
Length to end of the elytra 24, to tip of the pygidium 33, millim.; breadth 7 millim. 
Hab. Nicaracua, Chontaies (Janson). 
One immature male example of this extraordinary species has been received. ‘The 
very abnormal form of the anterior tibiz and tarsi of the male separates MM. distorta 
from all the known members of the genus, the following excepted. In other respects 
the species is exceedingly close to MJ. luteola. 
63. Mordellistena curvimana. (Tab. XV. figg. 17, ¢; 17a, anterior tibia 
and tarsus.) 
3. Elongate, subparallel, rather narrow, the head, oral organs, antennew, and prothorax testaceous, the eyes 
and elytra black, the latter with a large, oblong, slightly oblique, testaceous spot immediately below the 
shoulders (not quite reaching the base or lateral margin), the pygidium infuscate, reddish at the base ; 
the pubescence on the dark parts brownish, for the rest partaking of the ground-colour. Head compara- 
tively long; the eyes moderately large, somewhat finely granulated ; last joint of the maxillary palpi elongate, 
moderately stout, scalene-triangular ; antennee long and very slender, filiform, joints 3 and 4 short, together 
barely as long as 5, 4 a little longer than 3, 5-11 very elongate and thin, about three times as long as 
broad; prothorax as long as broad; elytra very long, subparallel in their basal half; beneath testaceous, 
the ventral segments 1—4 in great part piceous; pygidium very elongate and slender, nearly three times 
the length of the hypopygium ; legs very elongate, flavo-testaceous, the hind tibie and tarsi darker ; 
anterior tibise very broadly, triangularly dilated and flattened—the inner edge straight to a little beyond 
the middle and then cut off obliquely to the apex, the outer edge almost straight and finely and densely 
setose; anterior tarsi with joint 1 nearly as long as the others united, curved inwards, slender to 
about the middle, and then gradually widened to the apex, joints 2-4 elongate and slender, 3 and 4 
subequal ; intermediate tibie sinuous within ; the hind tibie with three oblique parallel ridges—the first 
interrupted in the middle and extending across the outer face of the tibia to near the base, the second 
shorter, the third very short ; the first joint of the hind tarsi with three, the second joint with two, rather 
long, oblique ridges. 
Length to end of the elytra 3, to tip of the pygidium 4, millim.; breadth 3 millim. 
Hab. Guatemata, Cerro Zunil (Champion). 
One male example. Allied to WV. distorta, but differing from the same sex of that 
species by the smaller and less coarsely granulated eyes, the longer and more slender 
antennee, the triangularly dilated anterior tibiz, &c.; the anterior tarsi have their first 
joint less curved and not so thin towards the base, and the penultimate joints longer 
and more slender. The anterior ridge on the hind tibiz is interrupted in the middle, but 
this is probably abnormal. 
64. Mordellistena xanthopyga. (Tab. XV. figg. 18,9; 18a, hind leg.) 
Short, cuneiform, the head reddish-testaceous, the prothorax black with the sides yellow (broadly so posteriorly), 
the scutellum and elytra black, the latter with two transverse yellow fascize—one before, the other beyond 
the middle, the anterior one broadly interrupted at the suture, the posterior one entire,—the pygidium 
flavo-testaceous, the pubescence partaking of the ground-colour. Head short and broad, the eyes rather 
small; palpi testaceous, the last joint of the maxillary pair more than twice as broad as long and some- 
what hammer-shaped in the male, elongate-triangular in the female; antenne very short in both 
sexes, testaceous, the apical two or three joints slightly darker, joints 3 and 4 narrow, subequal, 5-11 
