346 HETEROMERA. 
_ One female example. In the arrangement of the elytral pubescence this species 
resembles M/. palpalis, from the same sex of which it differs in its larger size, more 
elongate shape, black head, stouter pygidium, and the very much stouter and more 
angular apical joint of the maxillary palpi. The pubescence is rather sparse. The 
second hind tarsal joint is without ridges. 
67. Mordellistena bicinctella. 
Mordellistena bicinctella, Lec. Proc. Ac. Phil. xiv. p. 481; J. B. Smith, Trans. Am. Ent. Soc. x. 
“pp. 85, 90, t. 2. figg. 15, 16°; Bull. Brooklyn Ent. Soc. vi. p. 3. 
Short, subparallel ; the head varying in colour from black with the anterior part testaceous to entirely testa- 
ceous; the prothorax black, sometimes paler at the sides; the elytra black, with two flavo-testaceous fasciee 
—one a little below the base, interrupted at the suture (formed by an oblique stripe on each elytron), the 
other postmedian, transverse, uninterrupted ; the pygidium testaceous; the, pubescence partaking of the 
ground-colour. Head strongly transverse, the eyes rather small; palpi testaceous, the last joint of the 
maxillary pair elongate, moderately stout, scalene-triangular in both sexes, its apical side fully as long as 
the inner side; antenne pitchy-brown with the basal joints testaceous, or entirely testaceous, very 
short in both sexes, joints 3 and 4 narrow, short, subequal, 5-11 a little thickened, 5 considerably longer 
and stouter than 4, 5-10 decreasing in length, 10 as broad as long in the female ; prothorax transverse ; 
elyira short, subparallel in their basal half; beneath black, the last ventral segment often testaceous ; 
pygidium elongate, very slender; legs partly testaceous, the hind femora piceous; the hind tibie with two 
short oblique ridges, the first joint of the hind tarsi with one only, near the tip. 
Length to end of the elytra 13-2, to tip of the pygidium 2-23, millim. (d 2.) 
Hab. Norta America, Southern States12,—Mexico, Chilpancingo, Teapa (H. H. 
Smith); Guatumaa, Capetillo, Zapote (Champion). 
Eight specimens, agreeing fairly well with the imperfect descriptions of Leconte and 
Smith. Of the same size and colour as M. xanthopyga, which also has very short 
antenne in both sexes; but easily distinguishable from it by the ridges on the hind 
tibiee being subequal and by the last joint of the maxillary palpi being very similarly 
formed in the two sexes (in M. xanthopyga, 3 , this joint is hammer-shaped). If. beata 
has similarly carinate hind legs; but it has the male maxillary palpi formed as in 
M. xanthopyga. The Zapote specimen is smaller and narrower than the others. 
68. Mordellistena crux. (Tab. XV. figg. 21; 21a, hind leg.) 
Moderately elongate, narrow, subparallel, black; the head narrowly in front, the sides of the prothorax broadly 
behind, a curved oblique stripe on each elytron some little distance below the base, connected near the 
suture with a postmedian fascia, and also the extreme margin of the elytra, except at the base, flavo- 
testaceous ; the pubescence partaking of the ground-colour. Head short and broad, the eyes moderately 
large ; palpi testaceous; the last joint of the maxillary pair oblong-ovate, blunt at the apex; antenne 
obscure testaceous with the basal joints paler, slender, filiform, moderately long, joints 3 and 4 narrow, 
subequal, together not so long as the fifth, 5-11 a little stouter, 5-10 elongate, subequal, 11 longer than 
10; prothorax transverse ; elytra moderately long, subparallel in their basal half; beneath black, the 
ventral segments with their apical margins testaceous; pygidium elongate, slender ; legs in great part 
testaceous, the hind femora piceous; the hind tibie with two very short ridges, the first joint of the hind 
tarsi with one only, near the tip. 
Length to end of the elytra 23, to tip of the pygidium 27, millim. 
