326 HETEROMERA. 
cinereous- or yellowish-cinereous-pubescent ; pygidium moderately long in the male, shorter in the female, 
twice the length of the hypopygium; legs comparatively stout, black, the anterior pair in great part or 
entirely, the middle femora and tibie in some specimens, and the hind tibial spurs testaceous; the hind 
tibiee with five, the first joint of the hind tarsi with five (rarely six), and the second joint with three 
(rarely four), short, strong, oblique, parallel ridges. 
Var. The head, except the eyes and a large patch in the middle behind, and the anterior third of the pro- 
thorax, reddish-testaceous. 
Length to end of the elytra 4—44, to tip of the pygidium 5-52, millim.; breadth 13-12 millim. (d 2.) 
Hab. Mexico, Cordova (Sallé) ; Guatemaa, Capetillo, Duefias (Champion). 
Five examples of the type, one of the variety, the latter from Capetillo. An elongate, 
robustly-built species, with very elongate, cultriform, apical joint to the maxillary palpi, 
and numerous ridges on the hind tibie and first two joints of the hind tarsi, the legs 
comparatively stout. It is perhaps nearest allied to M. incana, from which it differs 
in the more numerous carine on the hind legs and in the more elongate shape. The 
head is narrowly extended on either side behind the eyes; the latter in I. incana 
extend to the occiput. From M. murina &c. the less parallel shape, the more 
numerous carine on the hind legs, and the longer apical joint to the maxillary palpi 
sufficiently distinguish it. 
27. Mordellistena longipalpis. (Tab. XIV. figg. 19, ¢ ; 19a, maxillary 
palpus; 19, hind leg.) 
Elongate, slightly cuneiform, black, the head in front and the prothorax at the sides (to a greater or less 
extent) usually testaceous or reddish-testaceous ; the pubescence rather coarse, brownish-cinereous, with 
intermixed blackish hairs. Head transverse, very much narrower than the prothorax; maxillary palpi 
testaceous, the apical joint in two examples (2) piceous, very long—the last joint in the male very 
elongate, cultriform, in the female shorter and with the apex more rounded; antenne slender, filiform, 
rather long in the male, slightly shorter in the female, black, the four basal joints testaceous, joint 3 short, 
4 a little longer than 3, 5 nearly twice as long as 4, 5-11 moderately elongate ; prothorax broader than 
long, somewhat narrowed behind in the male, the hind angles sharply rectangular; elytra elongate, sub- 
parallel towards the base ; beneath black, cinereo-pubescent ; pygidium very elongate in both sexes, about 
two and a half times the length of the hypopygium; legs black, the anterior femora and tibie usually, 
and sometimes part of the middle femora also, and the hind tibial spurs, testaceous ; the hind tibis and 
the first joint of the hind tarsi each with four or five, the second joint of the hind tarsi with three, short, 
oblique, parallel ridges. 
Length to end of the elytra 33-4, to tip of the pygidium 43-5, millim. (¢ 9.) 
Hab. Mexico, Omilteme, Chilpancingo, Xucumanatlan, Cuernavaca (H. H. Smith). 
Six males and two females. These latter differ from the others in having the head 
and thorax black, the apical joint of the maxillary palpi piceous, and the sides of the 
thorax more parallel behind ; but there is little doubt they belong to the same species. 
In all the males but one the sides of the thorax are testaceous. The dark examples 
very closely resemble J. murina; but they are separable therefrom by the longer 
maxillary palpi and the less uniformly coloured pubescence, and by the second joint of 
the hind tarsi having three (instead of two) ridges. The apical joint of the maxillary 
palpi of the male is more elongate and more cultriform than in the same sex of 
M. murina. The following, WM. discicollis, is a closely allied species. 
