ASPIDIOTUS PEESONATUS. 85 



obconical ; finely rugose ; is of a dark purplish-brown 

 colour, and has grey particles of the epidermal layer 

 of the food-plant mixed with the secretion. Exuviae, 

 in the centre of the anterior half, covered with greyish- 

 brown secretion forming two distinct concentric rings. 

 Ventral surface highly polished, but strongly punc- 

 tured ; apical portion farinose. Ventral scale a thin 

 secretion on the leaf. 



Long. *80 mm. 



Male second stage. Short ovate, widest at abdo- 

 minal segments. Colour dark translucent yellow. 



Habitat. Under glass, Royal Gardens, Kew ; on 

 Tillandsia confers/flora,, T. Saundersii, and T. coral- 

 Una; on which plants it was thoroughly well estab- 

 lished, and very common at the time of my visit in 

 July, 1896, and in April, 1897. 



Distribution. Its home is apparently in the West 

 Indies ; as Professor Comstock's types were from 

 Cuba. I have received it also from several sources 

 in Jamaica ; and Mr. Douglas records it from British 

 Guiana. 



DESCRIPTIONS OF THE PLATES. 



PL III, fig. 9. Puparia of adult female in profile. 



X 25. 

 Fig. 10. Puparium of adult female, ventral view, 



with portion of ventral scale broken away, reveal- 

 ing the female within. X 25. 

 Fig. 11. Basal layer of ventral scale attached to 



leaf, and surrounded by zone of discoloration of 



the leaf-tissues. X 25. 

 Fig. 12. Adult female after treatment with potash. 



X 50. 

 Fig. 13. Insects natural size in situ on portion of 



leaf of Tillaudsia. 



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

 PL XI, fig. 5. Margin of pygidium of adult female. 



X GOO, 



