376 



THE CANADIAN ENTOMOLOGIST 



deep yellow or light brown colour, entirely devoid of secretion 

 except for a few dorsal waxy filaments. Length of fully grown 

 larva .5 mm. (on slyJe). Segmentation indistinct. Anal open- 

 ing on dorsum at a slight distance from the posterior margin of 

 the body, simple as in adult, without an anal tube. Tracheal 

 system_as in adult. 



Fig. 37. — Larva of Siomacoccus 

 platani, n. sp. 



Fig.' 36. — Adult female of Siomacoccus 

 platani, n. sp. 



■Adult male apterous, entirely devoid of waxy vSecretion, of 

 a deep yellow colour. Antennae 10-segmented. Eyes simple. 



Male pupa enclosed within a loose sac. 



Male prepupa with mouth-parts, legs and antennae, the latter 

 very short and stout, apparently eight-segmented. General 

 form much like that of adult femal^. The earlier larval stages 

 of the male have not been recognized and it is not known if there 

 is an encysted stage, such as recorded by Hubbard and Pergande 

 for the male larva of Xylococcus betulcc Hub. and Perg. 



