66 LAMELLICORNIA. 



the same. Between the respective females I can discover no difference, but the males 

 are differentiated as follows : — 



P. coryihus. Cornu capitis lamina basali supra angustata, apice utrinque dentato-producta ; thoracis tuberculin 



antice porrectis. 

 P. telamon. Cornu capitis lamina basali quadrata, supra haud angustata, apice fere recte truncata ; thoracis 



tuberculis lateraliter porrectis. 



Males of minor development appear to be rare in this species : I have seen only two. 

 As usual in the Copridse, this form is scarcely recognizable on account of the degra- 

 dation in the armature of its head and thorax : — 



P. coryihus, tf minor. Cornu capitis obsolete, carinam supra tridenticulatam efficiente ; thorax antice vix retusus,. 

 tuberculis obtusis, transversis, prope apicem sitis. 



We figure a male from British Honduras and a female from the Volcan de Chiriqui. 



2. Phanaeus pluto. (Tab. III. figg. 18, 6 ; 18 a, side view of head and thorax.) 

 Phanceus pluto, Harold, Ann. Soc. Ent. Fr. 1863, p. 164 I . 



Hab. Mexico \ Puebla, Oaxaca (Salle). 



A distinct species. The male has, instead of a frontal horn, a tri-tuberculate carina 

 like that of the female, and the thoracic prominence is broad and projecting and quadri- 

 tuberculate on its front edge. The armature of the thorax in the female is the same 

 as in P. corythus, from which it is distinguished by the sides of the clypeus being 

 rounded towards the median tooth. 



3. PhanaeilS bitias. (Tab. III. figg. 19, s ; 19 a, side view of head and thorax.) 

 Phanceus bitias, Harold, Ann. Soc. Ent. Er. 1863, p. 163 \ 



Hab. Mexico, Tuxtepec (Salle l ). 



The type-specimen in the Salle collection appears to me to belong to the South- 

 Brazilian species P. dardanus, MacLeay (=jasius, Fabr., nee Olivier). I have seen no 

 other example from Mexico or Central America. 



4. PhanseUS Chryseicollis. (Tab. IV. figg. 2, <$ ■ 2 a, side view of head and 

 thorax.) 



Phanceus chryseicollis, Harold, Ann. Soc. Ent. Er. 1863, p. 164 \ 



Hab. Mexico, Cordova (Salle *) ; Nicaragua, Chontales ( Belt, Janson) ; Panama, 

 Caldera in Chiriqui (Champion). 



A well-developed male from Chontales is figured. 



5. PhanSBUS nOCtis. (Tab. III., figg. 20, e ; 20 a, side view of head and thorax.) 



P. chryseicolli proxime afflnis ; differt supra toto fuligineo-niger, opacus, thorax interdum marginibus prope 

 angulos angustissime cupreis ; corpore subfcus, pedes et pygidium nigro-cserulea ; thorace opaco, sparsim 

 vix perspicue punctulato, medio basi bipunctato, angulis anticis breviter lobatis; elytris subtiliter 

 striatis, interstitiis planis, lsevibus ; pygidio parce subtiliter punctulato. 



