?20 Br. T. A. Chapman on 



ever, it is almost a necessity, and so I have called them 

 respectively var. Bejarcnsis, from Bejar on Genis/a jiorida, 

 var. Canfh-lari.v, from the Sierra above Candelario on 

 Oytisus ^)?«'^aws, and var. Piedrahita', from the Sierra 

 above Piedrahita, also on Cytisus purgans. 



In average size hg'arcnsis resembles the other two forms, 

 viz. about 25 m.m., but ranges from 20 m.m, to 29 m.m., 

 having a larger proportion of large and small specimens, is 

 in fact mcn-e variable in this respect. The colour is a pale, 

 diaphanous Indian-ink tint. 



The larva is very similar to a medium-tinted one of JI. 

 jQcnel/a in colouring, but like the other two forms, and 

 unlike pen clht, it is fairly constant in colouiing, no speci- 

 men ranging far from the average, whilst pencUa hail no 

 definite type, and specimens varied much in the pro- 

 portions of yellow and black markings, some even being 

 almost entirely black, others nearly without black mark- 

 ings. Bcjarensis has a dorsal black line, or rather stripe, 

 the subdorsal yellow band has two dark spots on each 

 segment. The next dark band is well pronounced, and is 

 connected by dark markings with the narrow dark line 

 below, that runs along the spiracles; below this is an 

 uninterrupted yellow band, and below this a dark band 

 well defined above, below irregular, and more or less 

 reachmg to the prolegs. 



The cocoon is dark-coloured, the male pinkish-orange 

 (jKnc/la, lemon-3'ellow), the female deep orange almost red. 

 The female cocoon is of very large size compared with that 

 o{ pcncUa. The female cocoon is placed conspicuously on 

 the food-plant, sometimes on a separate projecting twig 

 such as the male imago selects as a resting-place. The 

 male cocoon, on the other hand, is usually well hidden, so 

 much so that I only succeeded in finding one containing 

 a living pupa, and only perhaps half-a-dozen altogether 

 hidden away under stones, etc., all, perhaps, but the one 

 living one, being remains from previous years. 



The food plant was a broom Genista Jiorida rather 

 abundant close to Bejar, where it made a handsome show, 

 but of which we saw little elsewhere. Amongst it grew 

 another broom which was very close to, if not identical 

 with common English broom. It occurred on this also, 

 but very sparingly as though able to live on it when the 

 larva had wandered on to it and had no choice, but neither 

 likimx nor thrivinsf on it. It did not occur on other 



