320 HETEROMERA. 
17. Mordellistena sanguinicollis, (Tab. XIV. figg. 10, ; 10a, antenna; 
10 4, maxillary palpus.) 
Elongate, cuneiform ; the head black with a brilliant opalescent lustre, the prothorax rufous, the elytra with 
two rather broad reddish fascie—one a little below the base, extending obliquely upwards to the shoulder 
(with the one on the opposite elytron nearly enclosing a broad scutellar patch), the other beyond the 
middle, transverse, both interrupted at the suture,—the pygidium broadly rufous at the base, blackish 
beyond ; the pubescence on the head, prothorax, scutellum, and elytral fascie, and also (very narrowly) 
along the basal half of the suture and at the apex of the elytra, yellowish-cinereous, for the rest brownish- 
black. Palpi testaceous, the last joint of the maxillary pair moderately long, scalene-triangular, rather 
slender ; antenne  piceous with the three basal joints testaceous, joint 3 short, slender, 4 much longer and 
stouter than 3, 5 a little wider and about one half longer than 4, 5-11 filiform, moderately thickened, 
7-10 subequal, twice as long as broad; prothorax transverse; elytra gradually narrowing from the base ; 
beneath black, the posterior coxe and venter, in great part, and the prothorax rufous ; pygidium very 
long, twice the length of the hypopygium ; legs testaceous, the hind pair reddish; the hind tibie with 
five, the first joint of the hind tarsi with four, and the second joint with two, short, oblique, parallel 
ridges. 
Length to end of the elytra 3}, to tip of the pygidium 43, millim.; breadth 13 millim. (<¢.) 
Hab. Panama, San Feliz in Chiriqui (Champion). 
One male example. Somewhat resembling J. forticornis (3), but with the 
antenne much less elongate, the fourth joint shorter and narrower than the fifth 
though much stouter and longer than the third; the last joint of the maxillary palpi 
less elongate ; the thorax, the venter, the pygidium at the base, the elytral fascize, and 
the hind legs rufous, the anterior and intermediate legs testaceous. ‘The elytral fascize 
in UM. forticornis are formed entirely by the arrangement and colour of the pubescence ; 
in MZ. sanguinicollis there is a corresponding difference in the ground-colour. 
A single worn specimen from Tolé is perhaps a female of the same species; it has 
the antennee very much shorter and more slender, the third and fourth joints subequal, 
and the outer eight joints obscure testaceous ; the head pitchy-red ; and the postmedian 
fascia of the elytra broken up into two oblong spots. It is considerably smaller than 
the male above described. 
18. Mordellistena trilinea. (Tab. XIV. figg. 11; lla, maxillary palpus; 
114, hind leg.) 
Moderately elongate, broad, robust, cuneiform ; the head reddish-testaceous with an opalescent lustre, the eyes, 
the prothorax, scutellum, elytra (the extreme apex excepted), and pygidium black, the apex of the 
elytra testaceous; the head, the sides of the prothorax indeterminately, the scutellum, the suture and a 
sublateral stripe on each elytron to one third from the apex, and also the apex itself, yellowish-cinereous- 
pubescent, the rest of the pubescence brownish-black. Head not very convex, obsoletely channelled in 
the middle behind; palpi testaceous, the last joint of the maxillary pair moderately stout, scalene- 
triangular, the apical side somewhat rounded; antenne obscure testaceous, short, comparatively slender, 
joints 3 and 4 narrow, subequal, 5-11 a little widened, 5-10 subserrate, equal in length and breadth, a 
little longer than broad, 11 longer than 10; prothorax transverse ; elytra moderately long, gradually 
narrowing from the base; beneath (the head and prothorax excepted) black, the base of the ventral 
segments yellowish-cinereous-pubescent ; pygidium moderately long, twice the length of the hypopygium ; 
anterior and middle legs testaceous, the hind pair pitchy-black with the tibial spurs testaceous ; the hind 
