206 MYTILASPTS PINNJIFORMIS. 



Male puparium, usually a little paler than that of the 

 female, is of a more delicate structure than that of M. 

 pomorum. Hinge towards the posterior extremity. 



Male unknown. 



Habitat. First recorded from the Royal Botanic 

 Gardens, Kew, on Gymbidium peiidulum^j Mr. Doughis. 

 It is strange that both Bouche and Signoret should have 

 found the insect upon the same genus of plants, as it 

 is a lover of Citrus trees, and everywhere where they 

 are cultivated the insect seems to become a pest. It 

 also occurs here freely upon imported oranges and 

 lemons. 



The female is easily distinguished from M. pomorum 

 by the tuberculate segments, the linear anterior group 

 of circumgenital glands, and the form and character of 

 the median lobes. Also by the second- stage female 

 having a spine-like projection on each of the abdominal 

 segments. 



EXPLANATION OF THE PLATES. 



PL XXV, fig. 10. Adult female after treatment witli 



potash. X 50. 



Fig. 11. Cast skin of second-stage female. X 50. 

 Fig. 12. Cast skin of larva. X 100. 

 PL XXVI, fig. 1. Pygidium of adult female. X 250. 

 PL XXVII, figs. 4 and 6. Margin of pygidium of 

 adult female. X 600. 



GENUS PINNASPIS (Cockerell). 



According to our present knowledge the generic 

 characters of this genus are only separable from 

 Mytilaspis by the comparatively large exuviae of the 

 second- stage female. 



We have no definite knowledge of the male puparium, 



