96 Rev. F.W. Hope's Observations on the Genus Cassida, 



D. C/i/uris, Hope, Long. 7 tin., hit. 7 lin. Totum corpus supra vi- 

 ride, thorace utrinque acute-angulato, convezo, impunctato ; 

 elytria in medio disci angulato-nodosia, subrugosis, lateribus 

 externia glabria ; corpus Bubtua atrum, elytria infra subcyaneis, 

 pedibus nigris plantiaque ferrugineia. 



Habitat in Insula Sancti Vincentii. 



This Cassida I obtained by purchase from the valuable col- 

 lection of the Rev. Lansdown Guilding. To this genus be- 

 long Cassida strigata of Schuppell, and luctuosa of Olivier 

 and others. 



Selenis*, Hope. PI. IV. fig. 3. 



Type of the Genus, Cassida perforata of Fabricius. 



^/^e?m<^articuliscompressisextrorsum crassioribus,l mo crasso, 

 2 do minimo, 3 tio lonjo gracilis 4 t0 breviori, 5 t0 et reliquis 

 longitudine decrescentibus, et gradatim crassioribus, ex- 

 timo apice acuto. 



Mandibulce corneae multidentatae. 



Maxilla? simplices, lobis rotundatis. 



Palpi maxillares l m0 minimo, 2 do longissimo curvato, apice la- 

 tiori, 3 tio et extimo sequalibus, ultimo apice conico. 



Mentum parvum subquadratum. 



Labium parvum trigonum et setosum. 



Palpi labiales l m0 articulo brevi, 2 do elongato, 3 tio subsecuri- 

 formi. 



Elytra semicircularia ante medium angulato elevata, humera- 

 libus angulis acute porrectis, apice elytromm acuminato. 



Thorax trigonus utrinque in spinam acutam productus. 



S. perforata I make the type of the genus. It appears 

 doubtful after examining many specimens of the above insects 

 if the perforations are not the result of accident; no two spe- 

 cimens accord ; the holes under a lens seem irregularly worn, 

 the effect may be caused simply by attrition ; it may be re- 

 marked also that the elytra of the same insect differ consider- 

 ably ; the only published species besides the type is C. Spi- 

 nifex, Fab., which is considered only as a sexual distinction. 

 There are, however, in our English cabinets others which are 

 undescribed. 



* Silenis, from the Greek 2i?^ut;, signifying a crescent. 



