H. 0N8L0W 221 



Var. impu ucti/'t^uiUi . 



(Soi* PluU' IX, No. 24.) Thin viirioty hiw tmt h<Tn pn*viimftly 

 de»cribt»d. Tho blark ImmJ of H|H)ts on ihr ouUt widr of th*- onm^<* 

 faRcin nuiv Vh' nunph't^'ly or |Mirtiiilly ol)sol«'tr<'. It wtiiih thiit. this 

 variety shouM have a closo coniK^ctioii with th<* pr('(MHiifi^ oip*, hut 

 there in no ovi<ii»nce fn)ni which to docido. Kithcr thr |H)rti«>ii nf th<' 

 band near the inner margin or the ecntnil portion nuiy Im- ohso|rt<\ 

 without the ajKW of the wing beinj; aflftJcUMl. In onlrr to HistingMi.sh 

 between the HifteriMit amounts of black present in thr hand of thes«* 

 insects, in Table II and elsewhere they have been (jualiHed in the 

 following way : 



impnnctifasciaUi ^ signifies that about half the band is obsolete. 

 „ // signifies that three quarters of the })and is 



obsolete. 

 „ . /// signifies that the band is completely oKsolete, 



or only traces of it present. 



(a) The Melanic Series. 



A certain number of varieties may be collected under this heading. 

 They consist of variations in the size and position of the black markings 

 on the wings and body, and of a suffusion of dark pigment over the 

 whole wing surface. For convenience they will be considered together. 

 In several cases, although different names have been given to the 

 variations, one oflen only denotes a more advanced stage of melanism 

 than the other. The furthest stage of melanism is found in var. varleyaki 

 (Porritt)'. I am at present investigating the relationship of this variety 

 to the type as well as to lacticolor. 



Var. radiiita. 



(See Plate IX, No. 5<S.) Marginal spots radiated, generally on the 

 fore wings only. This variety may of* course occur in grossalariata as 

 well as in lacticolor. 



Var. nigricostata. 



(See Plate IX, Nos. 16, 22 and 28. No. 44 also shows traces of a 

 black stripe.) The bhvck stripe may extend from the shoulder knot either 

 to the discoidal spot or throughout the whole length of the costa. Some- 

 times the black marking below the discoidal spot is confluent, so that a 



^ An excellent coloured illustration of var. varleijata (Porritt) is given by W. Bowater, 

 Plate XXVII, No. 45, Journal of Geneticg, Vol. in. 1914, p. 299. 



