22 CATALOGUE OF 



hind ward ; under side with the orange hue extending to three-fourths 

 of the length from the base. Wings with a dark cinereous fringe. 

 Fore wings orange at the base, purple towards the tips ; under side 

 pale gilded yellow along the costa from the base to two- thirds of the 

 length. Hind wings purple ; costa pale gilded yellow along 

 three-fourths of the length. Length of the body 6 lines ; of the wings 

 15 lines. 



Para. In Mr. Saunders' collection. 



Genus TIRISTA. 



Mas. Corpus robustum. Proboscis nulla. Palpi validi, 

 arcuati, oblique ascendentes, densissime fimbriati. Antennae sub- 

 pectinatae, apice stylatae. Abdomen fasciculo apicali supra attenu- 

 ato recurvo. Pedes robusti, subpilosi ; caicaria longa. Alae an- 

 gustae. 



Male. Body stout. Proboscis obsolete. Palpi stout, curved, 

 obliquely ascending, most densely fringed, not rising so high as the 

 vertex. Antennae stout, slightly pectinated ; the branches suc- 

 cessively decreasing in length, disappearing towards the tips, which 

 are stylate. Abdomen hardly tapering, full twice the length of the 

 thorax ; higher part of the apical tuft slender, much longer than the 

 lower part, deflexed at its tip. Legs stout, slightly pilose ; hind 

 tibiae with four long spurs. Wings narrow ; veins with the usual 

 structure. Fore wings opaque. Hind wings with the apical half 

 opaque. 



This genus is allied to Melittia, to Alonina and to Tarsa y but 

 may be distinguished from them by the form of the palpi. 



TlEISTA ARGENTIFRONS. 



Mas. Nigra, caput ant ice argenteum; palpi rafescentes apice 

 lutece ; thorax callis duobus strigisque quatuor pectoralibus 

 flavis ; abdomen rufum, fascia dimidioque apicali flavis, fas- 

 ciculo apicali flavo pilis nonnullis nigris; pedes rufi, femori- 

 bus nigris, tarsis auralis ,* ala> anlicce purpureo -nigra ; postica 

 vitrece, basi rufa, dimidio apicali nigricantes. 



Male. Black. Head silvery in front; hind border with a 

 luteous fringe. Hairs of the palpi reddish, luteous towards the tips. 

 Pectus with two yellow streaks on each side; a yellow callus at the 

 base of each fore wing. Abdomen red ; second segment with a 



