TYDEOLUS. 37 
TYDEOLUS. 
Tydeolus, ¥. Bates in litt. 
Closely allied to Schanicus. Head broad, short, the eyes not carinated within, front feebly trilobed, the 
epistoma a litttle produced and rounded in front, labrum almost hidden; prothorax strongly rounded at 
the sides, narrowed in front and behind ; elytra rather short, convex, rounded at the sides, a little more 
than twice the length of the thorax; anterior tibie a little curved, widened on the inner side from the 
apex to beyond the middle, then suddenly narrowed to the base, the outer apical angle not acute, almost 
rounded ; legs rather short; tarsi with short spiny hairs beneath; prosternum rounded and declivous 
behind ; mesosternum simple. 
Three Mexican species at present constitute this genus. Of a different facies from 
any of the Epitraginee known to me. May be known from Schenicus by the structure 
of the anterior tibie, the strongly rounded sides of the thorax, broader head, shorter 
form, and black colour; the anterior tibiz are apparently thickened in both sexes. 
1. Tydeolus atratis. 
Tydeolus mexicanus, F. Bates in litt. 
Oblong ovate, convex, black. Head coarsely and closely punctured; prothorax transverse, convex, strongly 
rounded at the sides, narrowed in front and behind, widest about the middle, front angles obtuse and not 
produced, almost rounded, feebly sinuate at the sides just before the subacute hind angles, base strongly 
bisinuate, very closely, evenly, and finely punctured ; elytra convex, a little wider than the thorax, rounded 
at the sides, the shoulders rounded, closely, evenly, and rather coarsely punctured, with scarcely any 
trace of strie. 
Length 73-83 millim. 
Hab. Mexico (coll. F. Bates), Puebla (Sal/é). 
Four examples. 
2, Tydeolus tibialis. 
Oblong ovate, rather convex, black with an sneous tinge. Head coarsely and closely punctured; prothorax 
transverse, convex, rounded at the sides, narrowed in front and behind, widest in the middle, anterior 
angles obtuse and almost rounded, sides nearly straight (not sinuate just before the base), hind angles 
rectangular, base strongly bisinuate, anterior margin almost straight, very closely, evenly, and finely 
punctured; elytra wider than the thorax, rather convex, rounded at the sides, closely, evenly, and rather 
coarsely punctured, with indications of obsolete strie. 
Length 8-9 millim. 
Hab. Mexico (coll. F. Bates). 
Three examples. Closely allied to 7. atratus, but not so black, the thorax less 
rounded at the sides and not sinuate just before the base, and the elytra a little more 
closely punctured. 
8. Tydeolus singularis. | 
Oblong ovate, convex, pitchy black with an eneous tinge. Head coarsely and closely punctured ; prothorax 
broad, transverse, convex, strongly rounded at the sides, narrowed in front and behind, widest in the 
middle, anterior angles obtuse and almost rounded, the sides feebly sinuate before the rectangular slightly 
prominent hind angles, base bisinuate, very closely, evenly, and finely punctured ; elytra a little broader 
