PINNASPIS BUCI. 209 



Botanical Gardens, Dublin (Burbidge), on Monstera 

 deliciosa, and from the Botanical Gardens, Liverpool 

 (Gutteridge), on Kentia, sp. 



Distribution. In Southern Europe it lives on the 

 box (Buxus sempervirens) . It also occurs in the 

 United States. 



Chrysalidocarpus hitescens, Wend., at Kew, produced 

 a distinct white form, which agrees with Cockerell's 

 var. albus. The puparium is transparent white ; 

 exuviae yellow, or orange-yellow to orange-brown. 

 Its form, too, is remarkable, in that many specimens 

 have the sides perfectly straight, and almost parallel. 

 I imagine the alteration in the colour is due to some 

 chemical action on the part of the plant, which affects 

 the secretionary matter, and renders it colourless. 

 Otherwise it is difficult to account for the numerous 

 colonies of this species on other plants in the same 

 house having normal red-brown puparia. 



EXPLANATION OP THE PLATES. 



PL XV, fig. 9. Insects natural size. 



Fig. 13. The same on portion of palm leaf, showing 

 stains caused by the insects. 



Fig. 10. Puparium of adult female. X 35. 



Fig. 11. Adult female. X 45. 



PL XXIII, fig. 2. Margin of pygidium of adult 

 female. X 600. 



Fig. 3. Pygidium of adult female. X 250. 



GENUS ISCHNASPIS (Douglas). 



A genus remarkable for the length and narrowness 

 of the female puparium, and the peculiar lattice-shaped 

 character on the dorsal surface of the female pygidium 

 (PL XXVIII, fig. 7). Another characteristic feature 

 is the possession of only three groups of circumgenital 

 glands (fig. 8). 



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