ISCHYOMIUS. 259 
ginata. Pedes breves, femoribus modice incrassatis, planiusculis, tibiis rectis, tarsis coarctatis latis, primo 
articulo posticorum longo, conico. Coxe oblonge. Abdomen quinque segmentis subequalibus, ultimo 
dimidio longiore. Prope G. Acropteron.” 
To this I would add :— 
Mentum exceedingly wide and short, more than twice as broad as long, widest in front, the anterior angles 
rounded, the base and apex very broadly truncate, the sides slightly constricted before the base; ligula 
very broad, emarginate; labial palpi widely separated at the base, the last joint small, short; outer lobe 
of the maxille comparatively very long, narrowing and acuminate at the apex, the inner lobe armed with 
a distinct tooth within; last joint of the maxillary palpi rather long, feebly subsecuriform (scarcely 
elongate acuminate); mandibles greatly developed, strongly exserted, visible from above, pointed at the 
apex, the space within armed with three or four short teeth ; labrum large and broad, separated by a distinct 
membranous clypeus; first joint of the antenne long, as long as the third, and stout; antennary orbits 
very feebly swollen; scutellum very broad, short, strongly transverse, broadly rounded behind; tarsi 
thickly clothed with silky hair beneath, laterally compressed, the outer apical angle of joints 2-4 of the 
front and middle pairs and of joints 2 and 3 of the posterior pair produced into a long lobe (the penulti- 
mate joint of all most distinctly and more rounded at the apex, and produced beneath the last joint 
which is inserted at the extreme base of the preceding one); tibial spurs strong; prosternum narrow, 
horizontal, smooth, the apex produced and rounded, strongly margined within ; anterior coxal cavities 
widely open behind ; intermediate coxe narrowly separated, with distinct trochantin ; third and fourth 
ventral segments without distinct coriaceous hind margin. 
The single known species is found by beating the withered hanging leaves of culti- 
vated Musacez, never about timber; I met with it plentifully in various parts of 
Chiriqui. 
1. Ischyomius singularis. (Tab. XI. figg. 17; 17a, labium; 176, maxilla 
and maxillary palpus; 17 c, mandible from above.) 
Ischyomius singularis, Chevr. Mitth. des Miinch. ent. Ver. ii. p. 98 ‘ 
Hab. Panama, Volcan de Chiriqui, Bugaba (Champion).—Co.omaia (coll. Brit. Mus.), 
Honda 4, Bogota. 
This insect will be readily identified from our figure and Chevrolat’s brief descrip- 
tion :—“ Flavus vel piceus, supra crebre fortiterque punctatus ; oculis nigris; prothorace 
ad basin extus profunde foveato ; corpore infra pedibusque flavo-pallidis. Long. 73-93, 
lat. 24-3 millim.” 
Group APOCRYPHIDES. 
This group, the Group I. of the Tribe “‘ Hélopides” of Lacordaire, is represented in 
Central America by a single genus nearly allied to Apocrypha (= Compsomorphus, Sol.) ; 
the latter contains a few small species from North America and Chili, and possibly also 
one or two undescribed forms from Western Australia. The species of both genera 
are known by their more or less globose unmargined thorax, convex oval elytra, &c. 
The species of Apocrypha appear to be rarely met with; they are said to be found on 
the ground ; doubtless Pseudapocrypha is of similar habits. 
2LL2 
