MORDELLA. 277 
pygidium (¢ ) very stout, moderately long, truncate at the tip, one third longer than the hypopygium ; 
legs black, the tibial spurs piceous, the anterior tibie almost straight, the four basal joints of the anterior 
and intermediate tarsi rather stout, densely pubescent beneath. 
Length to end of the elytra 74, to the tip of the pygidium 94, millim.; breadth 3} millim. (d¢.) 
Hab. Mexico, Tehuantepec (Sallé). 
One male example only. The trimaculate thorax, trifasciate elytra, stout and 
obtuse pygidium, and broad cuneiform shape chiefly distinguish J. tripartita. It is 
not very closely allied to any of the other species here described. 
12. Mordella arcuata. (Tab. XII. fig. 2.) 
Elongate, broadly cuneiform, rather convex, black; the head in part, the sides of the prothorax indeter- 
minately, the scutellum, a transverse fascia (sometimes reduced to a spot on either side of the suture) a 
little below the base of the elytra—extending upwards along the suture to the base and usually connected 
with a short oblique humeral stripe so as to enclose a large spot at the base of each elytron,—and 
another fascia a little beyond the middle (widening inwardly and nearly or quite reaching the suture, 
its anterior and posterior edges concave) fusco- or olivaceo-cinereous-pubescent, the rest of the pubes- 
cence black or brownish-black. Palpi obscure testaceous or reddish, the last joint of the maxillary pair 
darker, stout, elongate-triangular, its apical and outer sides about equal in length, each very much 
shorter than the inner side; antenne piceous with the basal joints reddish, rather slender, joints 3 and 4 
equal in length, 4 a little stouter than 3, 5-11 moderately widened, equal in width, 5-10 serrate, 
decreasing gradually in length, longer than broad (10 nearly as broad as long), 11 much longer than 10; 
scutellum triangular ; elytra moderately long, rapidly narrowing from the base, distinctly depressed 
along either side of the suture; beneath with a little fusco-cinereous pubescence at the base of the first 
ventral segment laterally and at the sides of the metasternum, for the rest brownish-black-pubescent ; 
pygidium broad and stout (forming almost a continuous line with the sides of the elytra), moderately 
long, truncate at the tip, scarcely shorter in the female, not more than one half longer than the hypopy- 
gium, the latter comparatively elongate; legs stout, black, the anterior femora reddish at the base, the 
tibial spurs piceous. 
Length to end of the elytra 53-63, to tip of the pygidium 7-8, millim.; breadth 23-3 millim. (¢ 2.) 
Hab. Mexico, Cordova (Sallé), Oaxaca (Hoge); Guatemata, Yzabal (Sal/é). 
Five examples. Perhaps nearest allied to WM. tripartita, but with much more 
slender antenne, the light pubescence very differently arranged and brownish or olivaceo- 
cinereous in colour, and the elytra more convex and distinctly depressed along either 
side of the suture. The pygidium is very stout, forming almost a continuous outline 
with the sides of the elytra, and truncate at the tip. The specimens in the Sallé 
collection are separated into three species, one of them bearing the MS. name of 
M. arcuata, Chevr. The post-basal fascia of the elytra is sometimes reduced to a 
spot on either side of the suture, so that it becomes disconnected from the short 
oblique humeral stripe. 
13. Mordella sellata. (Tab. XII. fig. 3.) 
Elongate, rather narrow, black; the head densely cinereo-pubescent ; the prothorax with a broad black 
median vitta posteriorly (not extending to the base and reaching to a little beyond the middle in front) 
and a black triangular spot on either side of it, for the rest densely cinereo-pubescent ; the scutellum 
cinereo-pubescent ; the elytra with a common transverse rhomboidal mark a little below the base, a 
