ON NEW SPILOSOMA HYBEIDS. 293 



8. Azanus ubaldus, Cramer. 



Syn. Papilio artemides, Stoll. 



LyccBiia zena, Moore. 



L. macalenga, Trimen. 



L. thebana, Staud. 



Natal, north-eastward to Somali and the Arnsa Galla country; 

 Arabia ; North-west India, southward to the Deccan ; Ceylon. 



Allied to the above is a Burmese insect which appears to me 

 to be distinct ; but, as we at jn'esent only possess one male 

 obtained at Tilin Yaw by the^ate Capt. Watson, I think it better 

 to wait for further material before doing anything with it. 



ON NEW SPILOSOMA HYBRIDS. 

 By Aristides v. Caradja.* 



[After introductory remarks upon the scientific importance 

 of hybridising experiments, the following new forms are de- 

 scribed.] 



Spilosoma hybr. seileri, Car. (pi. vi. figs. 1-6), is the off- 

 spring of S. luctuosa, H.-G., $ , and S. sordida, Hb., ? . The 

 crossing was successful in five cases, but from each of the broods 

 the larvae hatched in quite different numerical proportions ; while 

 two broods yielded only three apiece, and the third seven, the 

 remaining two produced forty-eight and seventy-one vigorous 

 caterpillars, from which, however, there were reared up, excluding 

 a number of cripples, only fifteen perfectly formed male and 

 twenty-seven female imagines, of which six males and ten females 

 had to be sacrificed to later experiments. At the same time I 

 was successful with the opposite combination, viz. sordida <? and 

 luctuosa ? ; but from the numerous eggs laid only small larvae 

 incapable of development hatched out. 



A short description of seileri is necessary despite the figures. 

 As regards the pattern and proportions of the wings, it is exactly 

 intermediate between its parents. The ground colouring of the 

 wings and other parts is grey-brown, darker than in luctuosa. 

 The yellowish covering of scales always plentifully present in the 

 last named appears but scantily in individual male and female 

 examples along the anterior and exterior margins of the fore 

 wings. The pair figured in Nos. 1 and 5 has the densest covering 

 of yellow scales, and hence appears the lightest ; the male figured 

 between them, at No. 3, is the darkest specimen of the whole 

 brood, but is nevertheless still lighter than my sordida, males, 



:;: ' Iris,' 1898, pp. 392-7, plate vi. (Translated by G. W. Kirkaldy.) 



See also Eatoin. 1899, pp. 106-8. 



