248 HETEROMERA. 
eyes very large, not widely separated, rounded, slightly oblique, the inferior portion smaller ; antennse 
long, slender, joint 1 stout and rather long, 2 small, short, about as broad as long, 3 three times as long 
as 2 and swollen towards the apex, 4 rather shorter than 3 and of similar shape, joint 5 the length of 4, 
joints 5-10 equal in length, scarcely widening outwardly, joint 11 longer than 10 and acuminate at the 
apex, the four basal joints glabrous and almost smooth, the others finely punctured and pubescent ; pro- 
thorax transverse, deeply bisinuate at the base, very strongly margined; scutellum large, scutiform ; 
elytra broad, considerably wider than the prothorax, subparallel to beyond the middle, thence obliquely 
narrowing to the subacuminate apex, the shoulders slightly swollen and rounded, strongly margined, 
transversely gibbous in the middle, the posterior half broadly flattened, regularly punctate-striate ; legs 
long and slender, smooth; tibiz slender, the anterior pair distinctly shorter than the others, and thickly 
clothed with fulvous hair on the inner side from about the middle to the apex in the male, more sparingly 
so in the female; tibial spurs very short, obsolete from the anterior pair; tarsi thickly clothed with 
silky hair beneath, the four hinder ones very long and slender, the anterior pair much shorter and 
stouter, the first joint of the posterior pair very long and slender, longer than the apical one in the male ; 
the anterior tarsi in the male with four joints only, the first joint large and swollen and formed by the 
anastomosed first and second joints, in the female five-jointed; prosternum broad, horizontal, the apex 
acuminate and much produced and received by the deeply concave mesosternum, the anterior face of which 
is strongly raised and tuberculate on each side; metasternum long, broadly transversely declivous behind ; 
intercoxal process broad, triangular; epipleure abruptly ending at the last ventral suture; body glabrous, 
metallic, winged. 
This new genus is remarkable on account of the very long and slender intermediate 
and hind legs (their tarsi being especially slender), and the above-described structure of 
the anterior tarsi in the male. This structure is identically the same in the numerous 
male examples before me; in all, the first and second joints are closely anastomosed 
into one large solid piece without visible suture, the anterior tarsi thus being four-jointed 
only in this sex. Mophon is not very closely allied to any described genus; it should 
be placed near Camaria. One species only, from Central America, is known to me. 
1. Mophon tinctipennis. (Tab. XI. figg. 6, ¢; 6a, labium; 60, maxilla and 
maxillary palpus.) 
Oblong ovate, broad, metallic olive-green, very shining. Head very sparingly and almost imperceptibly punc- 
tured, a deep impression on each side before the eyes ; prothorax punctured like the head, the base very 
strongly margined and with a distinct oblique fovea on each side, the sides more or less broadly and very 
shallowly emarginate in the middle, thence straight to the base, abruptly and very obliquely narrowing 
anteriorly, the anterior angles very obtuse, the lateral margins strongly reflexed; scutellum smooth ; 
elytra, if anything, widest beyond the middle, with regular rows of coarse impressions from the base to 
the apex (closely placed towards the base, more distant and consisting of coarse and fine impressions 
towards the sides and apex), broadly and shallowly depressed on each side at the base and also in the 
middle behind the scutellum, the interstices quite flat and almost impunctate, the apical half (and some- 
times the disc) tinged with purplish-cupreous; beneath bluish-green, almost smooth, the metasternum at 
the sides transversely, and the ventral surface longitudinally, wrinkled. 
Length 183-21 millim. (¢ 9.) 
Hab. Nicaracua, Chontales (Belt, coll. F. Bates) ; Panama, Volcan de Chiriqui 3000 
to 4000 feet (Champion). 
Numerous examples. 
