new genera and species of Callicliromina!. 409 



cariuis dual)us obsoletis : tarsis posticis paxilo magis quam in 

 L. argi-ntato elougatis et compressis : anteiiuis (?) corpore vix 

 brevioi'ibus, scapo apice Laud producto, articulis 4-7 fere ajqua 

 libus apice baud productis, 8-11 paulo abl)reviatis. Long. 10^ 

 lin. 9 . 



Hong Kong. 



From its resemblance to L. (Chelidoniiim) argentntmn this 

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

 antenna} do not fit •with tlie generic character. In structure it 

 fits better Avitli Palijzomi!^, l)ut the absence of yellow bands or 

 spots would render it incongruous there. 



Leontium optiiinnn. 



Supra subplanum, viridi-aHieum, tenuiter vclutiuum, elytris 

 macula communi, antemediana, sutui-ali, fasciaque postmediana, 

 flavis,, disco saturatius viridi: thorace dorso scabrosc marginibus 

 rugulose punctato, lateribus medio obtuse et grosse tuberculatis, 

 dorso maculis duabus atro-velutinis : antennis ( 9 ) corpore 

 triente brevioribus hand incrassatis, chalybeis, scapo a^ice extus 

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

 femoribus posticis versus apicem incrassatis, tibiis omuiljus 

 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, &c. 



AMBLYONTIUM, n. gen. 



Gen. Leontio affine. Corpus angustum clongatum, supra 

 planatum. Caput antice modice elongatum. Mandibula; sub- 

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

 Antenna; { $ ) corpore multo breviores, articulo 1 apice extus 

 paulo producto, 3 ci\?teris distincte longiori, 3-10 apice extus 

 breviter subspinosis, 5-11 laterahter carinataj. Thorax sub- 

 ovatus lateraliter inermis, supra planus, juxta basin haud 

 profunde sulcato-constrictus. Elj'tra apice obtuse rotundata. 

 Femora 4 antica incrassata, basi subpedunculata, 2 jiostica ely- 

 trorum apicem attingentia, gradatim incrassata: tibia' gradatim 

 compresso-dilat;itai : tarsi suljgraciles. Prosternum apice tuber- 

 culatum: mesosterniun ^'hinwm angustatum. Venter segmcntis 

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

 tccto. 



