166 Mr. H. W. Bates's additions to the 



pubescentibus, ante medium utrinque semifascia recta eburnea, 

 tuberibiis centre basalibus oblongis mediocriter elevatis, obtusis ; 

 superficie sat dense punctulata, fascia parnm punctata excepta 

 ante maculam cineream apicalem. Thorax elongatus, paullo con- 

 vexus, usque post medium leviter dilatatus, basi sat fortiter con- 

 tracta, dorso longitudinaliter hie ilUc confluenter striato. An- 

 tennae articuHs 8—11 fusco-nigrse. 



Hah. Mexico, Temax in North Yucatan (Gaiuiier). 



Rliopalophora exiynia, n. sp. (PL VIL, fig. 1). 



Elongata, gracilis, seneo-cyanea nitida, vittis duabus aureo-fulvis 

 a thoracis margine anteriori usque ad elytrorum apicem extensis 

 apud elytra latioribus et sutiu-am fere attingentibus ; antennis 

 pedibusque lajtius cyaneis ; corpore subtus (praecipue lateribus) 

 fulvo-aureo tomentoso. Thorax elongatus, antice paullo angustatus, 

 dorso sparsim transverse rugoso. Elytra lateribus nudis sat 

 grosse subsparsim punctata, apice breviter oblique truncata. Long. 

 14i millim. 



Ilah. Mexico, Cliilpancingo in Guerrero, alt. 4600 ft. 

 (//. II. Smith). 



One example only of this beautiful and very distinct 

 species has been received. 



Cusmtsoma nudicorne, n. sp. (PI. VIL, fig. 2, c? ). 



C. martyra (Thoms.) simillimum, differt solum anteimisarticulo 

 5to hand peuicillato. Long. 13 millim., ^ . 



Hah. Panama, Chiriqui (Trotsch). 



One example, differing in nothing from C. martyra 

 except in the absence of hair-brush from the antennae. 

 The colour is the same metallic greenish blue, with a 

 dark subvelutine sutural vitta, and the thorax has the 

 same strong sculpture, viz., a deep transverse sulcus 

 near the anterior, and another equally deep near the 

 posterior, margin, the latter angulated anteriorly, and 

 the intermediate space with five large obtuse tubercles. 

 The antennae have the same proportions ciliated beneath 

 joints 1 to 4, and with equally long and slender apical 

 joints. It is possible it may be only a variety or aber- 

 ration. 



