228 ORTHEZIDLE. 



matter, and at the anal extremity are two long, 

 divergent, tail-like appendages. Some of the insects 

 in tliis stage had formed dense white piiparia on the 

 stems of the food-plant, in which they evidently under- 

 go their final transformations. 



In 0. insignia "the male, after the first moult, is 

 readily distinguishable from the other sex. It becomes 

 more elongate, and, instead of secreting compact waxy 

 processes, envelops itself in a loose, woolly secretion. 

 Rudimentary wings begin to appear towards the end of 

 this stage. The pupal (or nymphal) stage is only dis- 

 tinguished by the presence of rather longer wing-pads, 

 and by the greater length of the antennas, which are 

 then folded back along the sides of the body, extending 

 nearly to its extremity. The pupa has long, well- 

 developed legs, which it can use when disturbed, 

 though it usually remains quiescent beneath its woolly 

 covering." * 



The young larvae are naked at first, but acquire a 

 secretionary covering before leaving the marsupium of 

 the parent. 



Only four genera or sub-genera are at present 

 described, viz. Orthezia (Bosc), Arctorthezia (Ckll.), 

 Newsteadia (Green), and Ortheziola (Sulc). 



Mr. Cockerell t treats of his Arctorthezia as a " new 

 section," and gives as the diagnosis " female with waxy 

 secretion dense, not easily removed; wedge-shaped 

 lamellae in dorsal line. Boreal forms. (0. occidentalis 

 and 0. cataphracta.)" As I fail to distinguish any im- 

 portant structural differences in Orthezia cataphracta 

 which are worthy of sub-generic rank, I have aban- 

 doned Cockerell' s new division. On the other hand, I 

 find Newsteadia so clearly distinct in both the larval 

 and adult stages that I have no hesitation in adopting 

 Mr. Green's J division, which I consider entitled to 

 full generic rank. Ortheziola approaches Newsteadia 



* Green, ' Circular/ Eoyal Bot. Gardens, Ceylon, S. 1, No. 10, p. 86. 

 t 'Entomologist/ vol. xxxv, p. 114 (1902). 

 t ' Ent. Mo. Mag./ s.s., vol. xiii, p. 284 (1902). 





