DITYLUS. 119 
middle of the disc (distinct only towards the base), and (in one example) with a more distinct one near 
the side extending from the shoulder to beyond the middle, the suture also a little raised; beneath finely 
and densely punctured and pubescent; fifth ventral segment broadly and shallowly arcuate-emarginate. 
Length 7-84 millim. (¢.) 
Hab. Guatema.a, Tepan 6000 feet (Conradt). 
Two male examples. Closely allied to D. brachinoides, and differing as follows :— 
The head more sparsely and finely punctured, not so dull, and without a smooth raised 
line on the vertex; the thorax longer and more convex, the surface more even and 
without distinct transverse depression in front; the elytra shorter, widest about the 
middle, and with the vague costz on the disc almost obsolete. 
3. Ditylus cephalotes, (Tab. V. fig. 23, 2 .) 
Elongate, rather convex, finely pubescent; varying in colour from dark piceous-brown to ferruginous with 
the prothorax testaceous, the latter in dark examples often more or less reddish or fulvous at the sides 
anteriorly, and the shoulders also lighter in colour; the head slightly shining, the prothorax shining, the 
elytra opaque. Head densely and finely punctured, and with a narrow smooth longitudinal space (slightly 
impressed in some examples) on the middle of the vertex, dilated at the sides behind the eyes, and largely 
developed in both sexes, broader than the prothorax in the male, the eyes convex and prominent, the 
antenne stout; prothorax longer than broad in the male, broader and rather shorter in the female, 
convex, the sides very much rounded anteriorly and strongly constricted behind, the hind angles 
moderately prominent, the disc transversely depressed before the middle and also before the base, and 
with an oblique impression on each side in front, the surface very closely and finely punctured, a smooth 
narrow longitudinal space on the middle of the disc impunctate, this space more or less impressed towards 
the base, the base finely margined (the margin not raised); elytra coriaceous, moderately long, widest 
beyond the middle, very closely and minutely punctured, with two very vague coste on the middle of the 
disc, these only distinct towards the base, and obsolete beyond, the suture also a little raised towards the 
base; beneath and the legs coloured like the rest of the body, the former finely and densely punctured 
and pubescent; fifth ventral segment unemarginate in the middle in both sexes. 
Length 84-11 millim. (¢ 2.) 
Hab. Guatemaa, Totonicapam 8500 to 10,600 feet (Champion). 
Eleven examples, found beneath loose pine-bark. To judge from this series there is 
very little sexual disparity in the development of the head in D. cephalotes; in the male 
the thorax is rather narrower and longer than it is in the female, and the head, in con- 
sequence, appears to be broader. More elongate than J. longicollis; the eyes much 
more prominent and a little larger; the head more densely punctured; the thorax 
more strongly rounded at the sides anteriorly, and more constricted behind. The 
more evenly convex thorax, prominent eyes, &c., distinguish it from D. brachinoides 
in all its varieties. 
4, Ditylus tepanensis. 
Elongate, rather convex, finely pubescent, piceous-brown; the head opaque, castaneous at the sides and in 
front, the epistoma and mandibles testaceous, the latter with the tips black; the prothorax shining, 
and with a reddish vitta on each side and an oblong spot on the middle of the disc behind; the 
elytra slightly shining. Head finely and not closely punctured (the punctures closer at the base and 
more distant in front), with a smooth impressed line on the middle of the vertex, moderately dilated at 
