162 DIASPIS CARUELI. 



Europe, Algeria, New Mexico, and Demerara ; and else- 

 where, under glass, on cultivated Cacti. Examples of 

 the puparia, which have been submitted to the rays 

 of the tropical sun, are of a pale brown or buff colour. 



EXPLANATION or PLATES. 



PI. XIII, fig. 11. Insects natural size in situ on por- 

 tion of cactus. 

 Fig. 12. Adult female after treatment with potash. 



X 45. 



PL XVI, fig. 3. Pygidium of adult female. X 250. 

 PI. XVIII, fig. 3. Margin of pygidium of adult 

 female, x 600. 



DIASPIS CARUELI (Targioni-Tozzetti). 

 (Fig. 18.) 



Diaspis carueli, Targ.-Tozz. ; Catal., 1868. 

 Diaspis carueli (Targ.-Tozz.) ; Signoret, Essai, p. 118. 

 ? Diaspis juniperi, Bouche; Ent. Zeit. Stett., 1851, 

 xii, 111. 



Female puparium more or less elongate, irregularly 

 pyriform, or approximately circular, very convex, 

 highest towards the anterior margin. White, but 

 almost covered with a sooty deposit, which gives them 

 a dirty grey appearance. Underside pure white, with a 

 faint tinge of yellow indicating the position of the 

 exuviae. Exuviae within the margin in front ; pale 

 translucent yellow or colourless ; secretionary covering 

 thin and colourless. 



Diameter '75 1*75 ; average diameter 1 mm. 



Adult female pyriform, narrowed behind ; yellow or 

 dirty greenish yellow. Rudimentary antennae placed 

 closely together, each with a single long spiny hair. 

 Anterior pair of spiracles, placed close to the base of 

 the mentum, are usually accompanied by a single pair 



