30 The Butterflies and Moths of Teneriffe. 



face of both sexes is cream- white, with a black apical 

 patch on the fore-wings. The undersides have the long 

 black blotch as seen on the surface of the female, and 

 the ground-colour of both is yellow, finely sprinkled 

 with black dots. The measurement across the wings 

 varies from two and a half to three and a half inches. 



It is best to procure the larvae to obtain good speci- 

 mens, but the Ichneumon fly is such an enemy to this 

 species that great disappointment will probably be 

 experienced in the rearing if the caterpillars are not well 

 examined before being placed in the breeding-cages. 



PIERIS WOLLASTONI. 



Plate I. — Fig. 1. 



This butterfly is allied to the Cheiranthi, but is a 

 distinct variety, only recently met with in this island. 

 Mr. Butler, of the British Museum, has named and 

 fully described this insect, which has hith-erto only been 

 found in Madeira, but is now for the first time enume- 

 rated in the list of Teneriffe Lepidoptera. It is some- 

 what smaller than the Cheiranthi, measuring not more 



