258 Rev. H. Clark on Dejean's Genus Coelomera. 



Genus I. Cerochroa, Gerstack. Peters, Mossamb. 1862, 

 Zool. Ins. 341 ; Bericht Akad. Berl. 1855, p. 3. 



Ovata. Caput verticale ; palpi maxillares subcylindrici, apice 

 acuminato. Thorax elytris multo attenuatior, Isevis, latere anteriore 

 paulum emarginato, angulis anticis satis porrectis et acutis, lateribus 

 paulum rotundatis, baud marginatis, margine postico subtransverso ; 

 disco laevi punctate. Scutellum subtriangulare, apice rotundato. 

 Elytra thorace latiora, versus medium ampliata, Isevia, vix marginata, 

 crebre punctata. Pedes robusti, unguiculis fortiter appendiculatis. 

 Metasternum versus apicem vel obsolete, vel in dentem acutum pro- 

 ductum. AntenntB Tohxxsids., breves, incrassatae, articulis 4°-ll™bre- 

 vibus et subsequalibus, 1° longiore, 3° primo breviore. 



The species on which this genus is based {Cerochroa ruficeps, 

 Gerst.) is more nearly allied to Adorium than to Ccelomera. The 

 genus may be separated from all other neighbouring forms by 

 its short and robust antennae ; it is also conspicuous for the very 

 narrow breadth of the thorax. From Adorium it may be sepa- 

 rated by the form of its antennae ; from Rhombopala, by its more 

 elongate form ; from Ccelomera, by its smooth and even thorax. 

 Three species of this genus are known : — 



1. C. ruficeps, Gerst. Bericht Verb. Akad. Berl. 1855; 

 Peters, Reise Mossamb. Zool. 341. 



2. C. hrachialis, Suffr. (Efver. Vetens. Ak. Forh. 1858. Caffraria. 



I think it probable that this species may prove to be a variety 

 of C. ruficeps. 



3. C. maculicollis, Baly, Descript. of Uncharacterized, &c., 

 Trans. Ent. Soc. Lond. 1864, p. 232. Old Calabar. 



Genus II. Alphidia. 



Robusta, subparallela. Caput verticale. Palpi maxillares art. 

 penultimo globose. Thorax declivis, transversus, angulis anticis 

 depressis, posticis obsoletis ; disco laevi. Scutellum triangulare, 

 Iseve. Elytra robusta, Isevia, punctata, Antennce robustaj, incras- 

 satse, art, 4°-l P' gradatim incrassatis, art. 3", 4° et 5° longitudine 

 sequalibus. Pedes robusti, unguiculis simplicibus. 



The genus Alphidia will stand near to Clitena ; it is separated 

 from it by its cylindrical (not flattened) incrassation of the an- 

 tennae, by the 3rd, 4th, and 5th joints being equal in length, 

 and by the simple unguiculi. 



A. comitata, {Galleruca) King, Ins. von Madagascar, p. 124. 



A common species, apparently, in Madagascar. In colour 

 flavous, with elytra bright green or bluish green. Length 4^, 

 breadth 2i lines. 



