310 HETEROMERA. 
The anterior or second ridge on the hind tibie extending across their 
outer face to near the base. 
Apical joint of the maxillary palpi more or less triangular or 
cultriform in both sexes, in some species shorter in the female. 
Hind tibie with four ridges . . . . . . . + « ~ ~ Species 52. 
Hind tibiz with three ridges. 
Anterior tibie not flattened in the male. . . . Species 53-61. 
Anterior tibiz broadly dilated and flattened in the rial Species 62, 63. 
Apical joint of the maxillary palpi hammer-shaped in the male, 
elongate-ovate with the apex obliquely truncate in the 
female . .. . Species 64. 
The basal joint only of the hind tarsi with oblique ridges ; ; the hind tibize 
with two or three ridges. 
The ridges on the hind tibie very short, subequal. 
Apical jomt of the maxillary palpi more or less triangular or 
ovate in both sexes. . . . . . . Species 65-68. 
Apical joint of the maxillary peilpi havnmer-shiped 3 in the: male, 
elongate-ovate with the apex truncate in the female . . . . Species 69-72. 
The anterior ridge on the hind tibiz extending across their outer face ; 
apical joint of the maxillary palpi hammer-shaped in the male . . Species 73. 
Hind tibize with a single subapical ridge only ; the basal one or two joints of 
the hind tarsi with faint or subobsolete ridges . 
Species 74, 75. 
1. Mordellistena ephippiata. (Tab. XIII. figg. 22, ¢ ; 22a, maxillary 
palpus.) 
Moderately elongate, robust, cuneiform, fulvous; the eyes and the tips of the mandibles black; the palpi 
testaceous ; the elytra with a common broad fascia just beyond the middle (extending upwards along 
the epipleure towards the base, and partly divided at the suture behind) and the scutellar region, inde- 
terminately, piceous ; the pubescence dense and partaking of the ground-colour. Head slightly depressed 
in the middle behind, the eyes rather small; last joint of the maxillary palpi (¢) exceedingly large, 
more than twice as broad as long, hammer-shaped (its apical side convex, deeply excavate within, its 
inner side concave, the tip rounded); antenne (d¢) testaceous, short, rather stout, filiform, joints 3 and 
4 short, narrow, about as broad as long, 5 very much wider than, and nearly twice as long as 3, 5-10 
about equal in length but decreasing in width, all longer than broad, 11 oblong ovate, a little longer 
than 10; prothorax transverse, the base with a few dark hairs in the middle; elytra convex, moderately 
long, narrower than the prothorax ; pygidium long and rather slender, more than twice the length of the 
hypopygium; beneath entirely fulvous; legs moderately stout, reddish-testaceous, the ridges on the 
hind pair black; the hind tibie with three oblique ridges (the first and second very long, the third 
shorter and subapical) ; the first joint of the hind tarsi with three, the second and third joints each with 
two, oblique ridges. 
Length to end of the elytra 4, to tip of the pygidium 5, millim.; breadth 14 millim. (<.) 
Hab. GuateMaa, Zapote (Champion). 
One male example. Easily distinguished from all the other Central-American 
species by the broadly fasciate elytra and fulvous colour, and by the exceedingly large, 
curved, hammer-shaped apical joint of the maxillary palpi in the male sex. The head, 
