14 i Rev. H. Clark on Species of Phytophaga 



2. R. pectoraliSj Chevr. 



R. pallide testacea ; capite, pedibus et pectore subtus nigro-fascis : 

 caput inter oculos arcuatim depressum, nigFum : antennce art. 1-6 

 nigro-fuscis, art. 1-5 ad iriteriorem partem testaceo adumbratis 

 (7-11 desunt) : thorax leevigatus : elytra sparsim sed baud pro- 

 fuiide punctata : pedes et corpus subtus nigra, abdomine autem 

 testaceo. 



Long. Corp. lin. 4^; lat. lin. 3^. 



Received from Siam by M. Chevrolat, from whose collection I 

 obtained the species. 



Genus Ochralea (Chevr., ined.). 



Corpus ovale, sat elongatum, nitidum, fere haud punctato-stri- 

 atum, subtihter punctatum, et omnino vel flavum vcl rufo-flavum. 

 Caput verticale ; oculi ovati ; palpi maxillares articulo penultimo 

 quadrato, ultimo producto, acuto. Thorax depressus, suhcpiadratus 

 (haud transversus) ; latera nee recta sunt, nee subrecta (ut in Adorio), 

 sed distincte rotundata. Scutellum triangulare. Elytra subparallela 

 et elongata, vix apud medium ampliata. Pedes sat graciles ; unguiculi 

 ad basin plus minus appendiculati sunt, haud ut in Adorio undique 

 biunguiculati. Corpore ^w^^z^smesosterni parapleurte elongato-trian- 

 gulares, pleuris ipsis vel obsoletis vel tenuibus. 



The genus Ochralea, proposed by Chevrolat, appears to be a 

 very natural one, and of much more easy definition than tlie 

 species themselves that compose it. It is nearly allied to 

 Adorium, but may be readily separated from it, not only by its 

 general form (more elongate and narrower), but by its maxillary 

 palpi, the apical joint of which is elongate and pointed at the 

 apex, not short and rounded as in Adorium (cf. Oliv. Hist. Nat. 

 viii. plate 93 bis, 1 e) ; its thorax is less transverse ; the un- 

 guiculi of the feet are not bifid, as generally in the species of 

 Adorium, but appendiculate ; and on the under side of the body 

 the parapleurse are more elongate, and the pleurae of the meso- 

 sternum, which in Adorium give a posteriorly rounded form to 

 the parapleurse, are here almost obsolete. 



0. nigricornis. 



O. elongato-ovalis, subtilissime punctata, pallide testacea, nitlda ; 

 antennis ad apicem, tibiis tarsisque nigris : caput longitudinaliter 

 iterumque transverse inter oculos foveatum est, impunctatum : 

 thorax subquadratus, angulis anticis late rotundatis et margin atis, 

 subtilissime punctatus : scutellum triangulare, impunctatum : 

 elytra thorace latiora, subparallela, tenuiter punctata : antennce 

 graciles, flavse, art. 10"^° et IT"*^ fusco-nigris : pedes flavi, tibiis 

 tarsisque nigris. 



Long. corp. lin. 5 ; lat. lin. 2|. 



The four or five different Eastern exponents of this form seem 



