MORDELLISTENA. 329 
testaceous, the hind pair darker on the dorsal edge; the hind tibie with four, the first joint of the hind 
tarsi with four (the basal one rudimentary), and the second joint with two, short, oblique ridges. 
Length to end of the elytra 3, to tip of the pygidium 4, millim.; breadth 1 millim. (¢.) 
Hab. Mexico, Jalapa (Hége). 
One male example. Easily separable from UV. instabilis in all its varieties (the 
form 7 of which resembles it in the elytral markings, when present) by the stout, securi- - 
form joint of the maxillary palpi in the male. In its black head ,and yellowish-red 
thorax and elytra, the latter with a black spot on the disc of each posteriorly, it differs 
from all the allied forms. 
33. Mordellistena subsenea. 
Very elongate, narrow, parallel, brassy-black, densely and uniformly clothed with coarse yellowish-cinereous 
pubescence. Maxillary palpi testaceous, the apical joint piceous, the latter comparatively small, elongate- 
triangular, its apical and inner sides about equal in length ; antenne (¢) piceous with the four basal 
joints testaceous, long and slender, filiform, joints 3 and 4 short, equal, 5 thicker than and twice as long 
as 4, 5-10 elongate, subequal ; prothorax short, transverse ; elytra very elongate, fully five times as long 
as the prothorax, parallel to beyond the middle ; beneath black, cinereo-pubescent ; pygidium (3) very 
slender, moderately long, more than twice the length of the hypopygium; legs piceous, the femora and 
the base of the tibiz and of the tarsal joints in great part reddish-testaceous ; the hind tibie and the first 
joint of the hind tarsi each with four, the second joint with two, faint, oblique ridges. 
Length to end of the elytra 3%, to tip of the pygidium 4, millim.; breadth 1 millim. (<.) 
Hab. GuateMa.a, Capetillo (Champion). 
One example. A densely pubescent, elongate, narrow species; the upper surface 
with a brassy lustre, the pygidium very slender, the femora and tibie in great part 
reddish-testaceous. ‘[he carinz on the hind legs are faint and not easily seen. 
34, Mordellistena cinereonotata. (Tab. XIV. fig. 23, 2.) 
Rather short, cuneiform, dull black, the elytra with two transverse fascise—one some little distance below the 
base and the other beyond the middle, both interrupted at the suture, the anterior one excised on its 
anterior and posterior edges and the posterior one interrupted laterally,—the suture from the base to the 
middle, and the apex cinereo-pubescent, the pubescence along the base and on either side of the disc of 
the prothorax and also that on the head cinereous, for the rest black. Head with a slight opalescent 
lustre, channelled in the middle behind; palpi obscure testaceous, the last joint of the maxillary pair 
darker, the latter elongate, scalene-triangular, its inner side not very much shorter than the outer side ; 
antenne piceous with the basal four joints testaceous, short, joints 3 and 4 narrow, subequal, 5-11 
moderately widened, 5 twice as wide as and very much longer than 4, 5-9 subequal, about as broad as 
long; prothorax transverse; elytra narrowing from the base; beneath black, the sides of the breast and 
the venter cinereo-pubescent ; pygidium moderately long, stout, conical, twice the length of the hypo- 
pygium ; legs piceous, the anterior femora and tibie and the intermediate femora lighter in colour, the 
hind tibial spurs testaceous ; the hind tibiee with four (three rather long and a shorter subapical one), the 
first joint of the hind tarsi with three, and the second joint with two, fainter, oblique, parallel ridges. 
Length to end of the elytra 23, to tip of the pygidium 3, millim.; breadth 1 millim. (9.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
One female example. Allied to IZ. pictipennis, from which it differs in having the 
elytral fasciz more transverse and less interrupted (though in the form of confluent 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 2, October 1891. 2UU 
