CETONIAD^. — TRICHIUS. 229 



beneath the clypeus : mandibles compressed, slender, lanceolate, with a sub- 

 quadrate membrane within: maxillae with membranaceous process within, 

 ciliated: palpi, maxillary with the terminal joint much larger than the others. 

 Head quadrate: eyes prominent: thorax ovate-quadrate, or suborbicular; 

 sternum sometimes produced anteriorly : elytra shorter than the abdomen : 

 body ovate, greatly depressed ; scutellum mostly distinct : legs slender ; tarsi 

 with simple, acute, undivided claws. 



The Cetoniadse are generally of gay and lively colours, and in 

 their perfect state subsist on vegetable juices, some preferring the 

 sap which flows from the wounds of trees, while others extract the 

 nectar of flowers: the former insects in their larva state usually 

 devouring putrescent wood, while the latter attack the roots of 

 living plants. The antennae, concealed labrum, and membranaceous 

 maxillae, readily distinguish them from the Melolonthidse. 



The following are the more obvious external characters of the 

 indigenous genera : 



fduabus externis: . 21 L Trichius. 

 f baud productum : ) 



! Tibiae anticce { 



dentibus i 

 [quinque externis: . 212. Acanthubcs. 



Lproductum: .... 213. Cetonia 



Genus CCXI. — Trichius, Fabricius. 



Antenna shorter than the head; basal joint curved, slightly pilose, with a few 

 bristles ; the capitulum elongate, slender. Palpi, maxillary subfihform, the 

 basal joint minute ; second and third short obovate, terminal elongate-obtuse : 

 labial with the apical joint larger than the rest, ovate: head correct: clypeus 

 quadrate, the anterior margin reflexed and somewhat emarginate: thorax 

 suborbicular: scutellum short: elytra subquadrate: body robust: abdomen 

 emarginate at the apex : legs elongate : tibia: bidentate externally : tarsi 

 with simple, acute, claws. 



The genus Trichius, although it contains three indigenous species 

 only, nevertheless requires subdivision, and will probably ere long 

 be formed into two genera, the habit of the insects being so ex- 

 tremely dissimilar, the typical species having the body nearly 

 entirely clothed with dense pubescence — whence the name of the 

 genus — and the others being nearly glabrous, or but slightly pubes- 



