59G Mr. N. D. Riley on Rhopaloeera from 



11. PiJygonia c-album^ Linn., £. hutchinsoni% Robson. 



Karind Gorge, 12. 8. 18, 1 S • 



It will be noticed tbat all three forms mentioned above 

 were taken at the same locality within a week. 



It may be of interest here to publish a note on the 

 Central Asiatic forms of this genus made by M. Andre 

 Avinoff shortly before the war and left at the B.M.; it 

 shoukl help to clear up the muddle which surrounds 

 P. interposita, Stand. It runs : — " Polyyonia egea (tri- 

 angulum) is found in Europe; in the south begins, from 

 Caucasus, to get darker and gradually runs into the form of 

 Central Asia. It is not the inteiyosita of Staudinger, as the 

 interposita is the c-album form with some character of eyea 

 (1 saw the type and studied the form by the Turkestan 

 material). Grum-Grshmailo gave the name undina (Rom. 

 Mem. iv. p. 424) to the egea of Turkestan, but he was not 

 quite right on the distribution (all he says about Osch and 

 Margelan). In reality undina goes to Chitral by Bokhara 

 and flies with interposita. The series of the B.M. contain 

 both species ; egea does not go to the south. Interposita is 

 darker in Chitral, Goorais, Thundiani (cognata'), and brighter 

 and less dark in the South Himalayas (Nepal, Sikkim to 

 Ta-Tsien-Lu), where it is agnicula (tibetanus, Elwes). Inter- 

 posita is veiy near to c-album, but ifmay be a distint species." 



From this, the series in the B.M., and indeed from 

 Staudingcr's original description (Stett. Ent. Zeit. 1881, 

 p. 28G), it is evident that interposita has nothing to do with 

 egea, although almost invariably associated with it by 

 authors. Staudinger^s description certainly is discursive to 

 a degree, but it is obvious he regarded interposita as a closer 

 ally of c-album than of egea. What has hitherto been 

 generally knowu as ijiterposita must in future go by the 

 name undina, Gr.-Gr. 



The position iu the Himalayas seems to be that there are 

 tliree species, represented in the B.M. as follows : — 



1. P. egea undina, Gr.-Gr., from Chitral and Hunza. 



2. P. c-album cognata, Mooie, „ Thimdiana, Kulu, Naudar, 



Simla, and Chumpur. 



3. P. interposita interposita, Staud., „ Chitral, Ladakli, Kyhiug, 



Kulu, Goorais, Pangi, 

 Dugi, Goolmurg, and 

 Gurwhal. 

 3rt. P. hiterposita agnicida, Moore „ Nepal, Sikliini, Tibet to 

 {tibetanus, Elw^es). Ta-Tsieu-Lu. 



It may be as well here to correct a further error, for 



