( 674 ) 



XytophiiiH's. Tliis geuns PInuiOj-yla is of special interest iiiasiimcli ;is it diti'ers 

 from Xi/lopliancK in a specialisation of tlic j)a]ims whicii recurs in several Old 

 World iienera. 



Key to tlie genera : 



a. Shorter inidtiMal spur witii comb of jiroiuinent 



sinnes ........ 



Shorter midtibial spur witiiout such a comb 



b. Base of tongue exposed, second segments of 



jialpi not contiguous 



Base of tongne not exposed, second segments 

 of palpi contiguous ..... 



c. Second segment of palpus obviously narrower 



in side-view than the first, more or less 



narrowing apically ..... 



Second segment of palpus not narrower than 



the first 



d. Inner surface of second segment of palpus naked 

 Inner surface of second segment of palpus 



covered with dispersed small scales ; fore- 

 wing and body above bright green, hindwing 

 yellow and black 



e. Second segment of i)alpus narrowing towards 



end ; Africa ...... 



Second segment of palpus not narrowing 

 towards end ; India ..... 



J. Scaling at apex of first segment of palpus, on 



innerside, dense and regular 



Scaling at apex of first segment of palpus, on 



innerside, not dense, irregular 



y. Second segment of palpus, on innerside, with 



apical tuft of scales directed proximad and 



ventrad 



No such tuft ....... 



h. Scaling of first segment of pal])us, on outerside, 

 longest just below the apical cavity 

 Scaling longest proximally .... 



i. First segment of palpus strougly convex at 

 apex on outerside, bearing a transverse crest 

 of scales, or a fringe of hairs along eye 

 First segment of palpus not obviously convex 



at apex 



/'. Second segment of palpus with ajiical tuft on 

 innerside ....... 



Second segment of palpus without apical tuft 

 on innerside ...... 



k. Second segment of i)alpus on outerside with a 

 lateral crest as a continuation of the eye- 

 lashes ........ 



dLXIV. Centroctena. 

 . h. 



. (I. 



CLXVI. L'echenena. 



CLIX. Kuchloron. 

 (' L VI II. < 'haerociiia. 

 CLXV. Rkaya.stis. 



■ y- 



■ J- 



L'LXIII. Rhyncholaba 

 CLXII. Theretra. 



ULX. Basiothia. 

 ( 'LXI. lUppotioH. 

 CLIV. Fhanoxylu. 

 . k. 



CLVIi. Rkoda/ra. 



