new genera and species of CalKcliromiua!. 409 



carinis duabus obsoletis : tarsis posticis paiilo magis quam in 

 L. argentato elongatis et compreshis : autenuis ( ^ ) corpore vix 

 brevioribus, scapo apice hand producto, articulis 4-7 fere a;qua 

 libus apice liaud pvoductis, 8-11 paiilo abbreviatis. Long. lO^- 

 lin. 9 . 



Hong Kong. 



From its resemblance to L. (Chelidonium) argentatum this 

 species cannot well be removed from the genus, but its simple 

 antennae do not fit with the generic character. In structure it 

 fits better with Polyzonus, but the absence of yellow bands or 

 spots would render it incongruous there. 



Leontium optimum. 



Supra subplanum, viridi-ajneum, tenuiter velutinum, elytris 

 macula communi, autemediana, suturali, fasciaque postmediana, 

 flavis, disco saturatius viridi: thorace dorso scabrose marginibus 

 rugulose punctato, lateribus medio obtuse et grosse tuborculatis, 

 dorso maculis duabus atro-velutinis : autennis (?) corpore 

 triente brevioribus haud incrassatis, chalybeis, scapo apice extus 

 acute producto, articulis 4-10 apice extus modice productis: 

 fcmoribus posticis versus apicem incrassatis, tibiis omnibus 

 violaceis, posticis valde flexuosis. Long. 14 lin. ? . 



Laos (Mouhot). 



Forms a distinct section in the genus, from its obtuse thorax, 

 thickened hind thighs, style of coloration, etc. 



A:\IBLY0NTIUM, u. gen. 



Gen. Leontio affiue. Corpus angustum clongatum, supra 

 planatum. Caput antice modice elongatum. Mandibular sub- 

 recta3, juxta apicem abrupte incurva?, intus late dentataj. 

 Antennas { $ ) corpore multo brev lores, articulo 1 apice extus 

 paulo producto, 3 cajteris distincte longiori, 3-10 apice extus 

 breviter subspinosis, 5-11 lateraliter carinatas. Thorax sub- 

 ovatus lateraliter inermis, supra planus, juxta basin haud 

 profuude sulcato-constrictus. Elytra apice obtuse rotundata. 

 Femora 4 aiitica incrassata, basi subpcdunculata, 2 ])0stica ely- 

 trorum apicem attiugentia, gradatim iiicrassata: tibia; gradatim 

 compresso-dilatjitaj : tarsi siibgraciles. Prostemum apice tuber- 

 culatum: mesosternum planum angustatum. Venter segmcntis 

 sex, 5 apice arcuato, 6 fortit^r emarginato, a pygidio elongate 

 tecto. 



