Appendix : Description of a New Race op Bordeta 

 posticigutta Prout. 



B. posticigutta decocta, subsp. nov. 



S, 46-48 mm. Abdomen dorsally black or at least (perhaps 

 in one-third of the examples) with the black belts considerably 

 broadened. Fore-wing almost as variable as in p. posticigutta, 

 but with the spots — especially the proximal and the subtornal 

 ^on an average reduced, the minute one on SM^ only present 

 in one example. Hind-wing with the black border somewhat 

 narrowed, entirely without the subtornal yellow spot. Under- 

 side the same, but the hind-wing showing, in the broadest- 

 bordered aberration, a minute yellow dot close to termen 

 just behind M^. 



9, 48-53 mm. Fore-wing with the band yellowish-buff 

 in all the known examples (sometimes almost orange, at least 

 beneath), on an average narrower than in the other race, 

 the fork to hind margin always obsolete or greatly reduced 

 and broken — often indicated by a small dot on SM^, similar 

 to that of the (^-ab. mentioned above. Hind-iving with the 

 orange subtornal band generally reduced, though variable. 



BuRU : Gamoe 'Mrapat, Central West Burn, 5000 ft., 

 April-May 1922 (C, F. and J. Pratt), a good series in coll. 

 Joicey. Also several from Kako Tagalago, Central Buru, 

 2700 ft.. May 1922. 



In connection with this exhibit Mr. Talbot made the 

 following remarks :— 



Certain forms of Agaristidae may serve as models or con- 

 stitute the centre of an orange-and- white association. In 

 Dutch New Guinea the Eucharidema trichroa has somewhat 

 similar markings to a form of the commoner Agaristid, Imme- 

 talia saturata longipalpis Kirsch. In Ceram the Eucharidema 

 follows Immetalia saturata Walk., form leucomelas Jord., which, 

 however, is less common than Ophthalmis privata Walk., a 

 species in which the white band is more distal. In Buru 

 the Bordeta has a pale orange band and may be associated with 

 Immetalia saturata Walk., in which the ^ has a pale orange band. 



Eucharidema, with its sharply defined bands, is perhaps 

 the older mimic of the Agaristid and the Bordeta ?, with its 

 dyslegnic bands, a more recent develojiment in association 

 with the Eucharidema. The two allied Geometrid genera 



