140 GENERAL MORPHOLOGY OF THE LEBBEK SCALE. 



this, however, is a character common to the pupse o£ certain other members 

 of the genus. 



Average length 1 mm. 



Larva. Farinose. Rich brown tinged with purplish ; head, antennae, legs 

 and apex of abdomen inclined to ochreous, shaded with brown. 



Ovum. Generally rich brown tinged with purplish, but some are decidedly 

 paler than others, being inclined to ochreous brown. Cuticle smooth and 

 slightly polished. Generally sparsely mealy and often with a few threads of 

 the secretionary matter of the ovisac attached thereto. 



Length 0-38-0-40 mm.; diameter 0-22-0-24 mm. 



Cockerell's Dactylopius Jii/meiioclece* is very closely related to D. perniciosus. 

 In both insects the pigment changes to a dark green colour w^hen boiled in 

 caustic potash. The ovisacs are also almost identical. In D. perniciosus, how- 

 ever, there is a total absence of the " dagger-shaped spines in the caudal region" 

 (Cockerell, /. c), and also the "minute denticle ^^ on the ventral surface of 

 the claw. This species may be further distinguished from D. hymenoclece by 

 the presence of well-marked spines on the antennae. 



June 6th, 1910. 



* Canadian Entomologist, xxxi, p. 267 (1891). 



