232 HETEROMERA. 
ventral suture, thence to the apex narrow; metasternum deeply impressed in the middle behind ; surface 
shining, more or less pilose. 
This genus will be at once known from Goniadera by the completely divided eyes and 
the very differently formed antenne. Xanthicles includes two allied species, both of 
comparatively small size, from Costa Rica; these insects bear a strong superficial resem- 
blance to certain Carabide, e. g. Patrobus. 
1. Xanthicles caraboides. (Tab. X. fige. 16 ; 16 a, labium; 16 0, maxilla and 
maxillary palpus.) 
Piceous, clothed with scattered erect hairs. Head very coarsely, sparingly, and irregularly punctured, broadly 
and subtriangularly excavate anteriorly, clothed with numerous erect hairs; prothorax as long as broad, 
widest anteriorly, the sides strongly constricted behind the middle, thence widening a little to the base, 
the anterior angles broadly rounded and not produced, the hind angles prominent but obtuse, the extended 
lateral margins very prominent, the apex broadly and shallowly emarginate in the middle, the base straight, 
the surface very finely and closely punctured, with numerous widely scattered coarse shallow impressions 
and a few erect hairs; elytra regularly crenate-striate, the interstices rather broad, smooth, and feebly 
convex, the humeri with two or three erect hairs; antenne and legs light reddish-ferruginous ; beneath 
shining, light reddish-brown, very sparingly and shallowly, the epipleure very coarsely and irregularly, 
punctured. 
Length 83 millim. 
Hab. Costa Rica, Irazu 6000 to 7000 feet (Rogers). 
One example. 
2. Xanthicles hirsutus. 
Piceous, somewhat densely clothed with erect testaceous hairs. Head coarsely and subconfluently punctured, 
deeply impressed transversely in front; prothorax as long as broad, widest anteriorly, the sides strongly 
margined, narrowing to the base, and feebly sinuate behind, the apex feebly emarginate in the middle, the 
anterior angles broadly and obliquely truncated and not produced, the hind angles rectangular, the base 
straight, the surface exceedingly finely and closely punctured and with numerous rather closely placed 
coarse shallow impressions ; elytra closely punctate-striate (the punctures transverse, closely and rather 
irregularly placed), the interstices narrow and uneven, very feebly convex, and irregularly but distinctly 
punctured; beneath light reddish-brown, sparingly and shallowly, the epipleure very coarsely and sub- 
confluently, punctured ; legs and antenne light reddish-ferruginous. 
Length 7 millim. (<¢.) 
Hab. Costa Rica, Cache (Logers). 
The more pubescent and differently sculptured upper surface will readily distin- 
guish this species from X. caraboides. 
Group HETEROTARSIDES, 
This group, like the preceding, is only represented in Central America by two genera, 
Anedus and Paratenetus. The typical Old-World genus Heterotarsus is remarkable on 
account of having one joint less in each of the tarsi—4, 4, 3; in our genera, however, 
the tarsi are formed as usual. Anedus appears to be represented in the Old World 
by Lyprops, a genus also numerous in species. The North-American genus Pratwus 
