82 MALACODERMATA. 
European 7’. tristis. The male, however, has the sides of the thorax notched near the 
middle, and the apical segment divided ; the external claws are also split, though only 
at their extreme apex, and the fission is not easily seen with an ordinary lens. The 
coriaceous sculpture of the elytra is a good distinctive character. 
From D. carbonarium the thorax hardly narrower in the male than in the female, 
with a central notch, will at once separate it. 
10. Discodon triste. 
Atrum, subopacum ; capite et prothorace nitidis, hoc lateribus latius albido-flavis (maris medio) tenuiter oblique 
incisis; elytris rugose subcoriaceis. Long. 63-8 millim. 3. 
Mas prothoracis margine laterali tenuiter plicato-interrupto ; unguiculis anticis internis lobo subtriangulari, 
intermediis et posticis externis fissis. 
Hab. Mexico, San Luis Potosi, Hacienda de Bleados (Dr. Palmer), Guanajuato (Dugés, 
coll. Sallé); GuateMALA, Duefias, Capetillo (Champion) ; Nicaragua, Chontales (Janson). 
Var. Prothoracis lateribus rufis. | 
Hab. GuatTEMALA, Quiche Mountains (Champion). 
Entirely black, with the exception of the thorax, which has its sides broadly pale 
yellow, inclining to red near the middle. The disk is very shining and black; this 
discoidal patch increases in width towards the base, so as sometimes to form a triangle ; 
or it is widened behind, with an indistinct spot on each side near the hind angles, which 
is less intense. The angles and base itself are often pale; but the black usually extends 
to the base and front in the middle. 
The mandibles are pitchy, lighter in colour at their bases, and darker at the tips ; 
the rest of the head, body, and legs is entirely black. The elytra are almost rugose, 
with very obsolete indications of strie. 
This species is evidently a very near ally of D. melancholicum, and perhaps ‘not 
specifically distinct. ‘Some specimens which I think belong to the same species are 
pitchy; and some of those from Chontales have the legs partly pitchy red; this is 
probably due to their having been captured soon after having quitted the pupal state. 
11. Discodon normale. (Tab. V. fig. 20, 2 Telephorus; Tab. VI. fig. 20, ¢ .) 
Nigrum, opacum ; capite et prothorace subnitidis, hoc lateribus late flavis, puncto subdiscoidali utrinque haud 
distincto, illo fronte flava, ore fusco. Long. 10-11 millim. ¢ 9. 
Mas prothoracis disco infra medium incisura sat profunda fere recta; unguiculis anticis internis et intermediis 
externis lobo membranaceo instructis, posticis externis fissis. 
Hab. Mexico, Cuernavaca, Oaxaca, Capulalpam, Juquila (Boucard, coll. Sallé), 
Mexico city (Dr. Palmer), Jalapa, Cordova, Cerro de Plumas (Hoge); GuatEma.a, 
Capetillo (Champion). 
Var. elytris sutura margineque flavis. 
Hab. Mexico, Cuernavaca, Juquila (Boucard, coll. Sallé). 
The figure on Plate V. represents a female specimen from Capetillo; that on Plate 
VI. a male from Mexico. 
