62 



THE CANADIAN ENTOMOLOGIST 



Pcrcccccus tinctorius Ckll. 

 Fig. 12. 



Habit. — Adult female entirely enclosed within a test of hard, black secretion 

 which is roughly spherical in form. 



Morphological characteristics. — Length (flattened on slide) 2.5 mm. In 

 form the body (flattened on the slide) is almost circular except for the fact that 

 the last four abdominal segments, together being much narrower than the 

 remainder of the body, form a sort of tail (Fig. A). The terminal segment 

 bears the rather large and heavily chitinized anal ring, which is flanked on each 

 side by a large, chitinized area bearing two or three conical spines and a few 



Fig. 12. — Porococius tinclorius Ckll. A, general aspect of body; B, dorsal asp?ct of last four abdominal 



segments; C, trilocular pore; D, antenna; E, leg; F, type of spine occurring on dorsum of last four 



abdominal segments; G, type of spine on the dorsum anterior to the last four abdominal segments. 



pores, these areas nearly meeting at the median line of the dorsum and extend- 

 ing slightly on to the ventral side. The next three segments each bear a trans- 

 verse, heavily chitinized area beset with numerous conical spines of the type 

 shown in Fig. F and pores (Fig. B). Over the remainder of the body the spines 

 are rather few and are much smaller, short and tubercle like (Fig. G). Tri- 



