MYTILASPTS POMOEUM. 201 



open and exposed part of Blackheath, far from any 

 other shrub or tree. I found the scales not uncommon. 

 They were on the young terminal shoots, not on the 

 bark, but closely fitted into the longitudinal grooves of 

 the spines or the narrow hollow of the leaflet at their 

 base, and being of the exact width of their site were 

 not easy to detect. . . . Here and there, however, at 

 the wider part of a spine at its base was a scale some- 

 what broader behind. On one spine are two scales that 

 had begun at a level point, and for as far as they were 

 only as wide as the larval scale they are side by side, 

 but then one of them having occupied the width of the 

 groove, the other had no resource left but to cross the 

 scale of its rival, which it did, and maintained its 

 position." 



In 1896 Mr. Green found this variety fairly common 

 at Sherbrook, Devon, but I have never met with it any- 

 where. Very dark examples of M. pomorum also occur 

 on Vaccinium myrtillus, but they are typical in form. 



MYTILASPIS POMORUM, var. CANDIDUS (Newstead). 



Mytilaspis pomorum, Bouche, var. candidus, Newst. ; 

 Ent. Mo. Mag., s. s., vol. xii, p. 82, 1901. 



Puparium of adult female snow- white, very elongate, 

 of uniform width throughout, and very convex ; 

 texture much less horny than typical puparia, and 

 resembling more closely the puparia of Chionaspis or 

 Poliaspis. Its position was curved round the base of 

 a spine of the food-plant. Female adult not differing 

 from typical M. pomorum on apple. 



The puparium of this variety shows the most re- 

 markable deviation from the type I have yet seen. It 

 was discovered by Mr. E. E. Green (to whom I am 

 indebted for the specimen) at Halfway Bridge, Pet- 

 worth, Sussex, September 1st, 1899. He says, "I 

 enclose a single specimen of a Mytilaspis with a snowy 



