Vol. Xxix] ENTOMOLOGICAL NEWS. 20/ 



September, adults of a second brood appear and later go into 

 hibernation. On account of the extended oviposition period, 

 it is possible at times to find all nymphal stages feeding to- 

 gether. Colonies of early stage nymphs move around very 

 little. Colonies of fourth and fifth stage nymphs move around 

 more than the younger ones, probably because |he leaf tissue 

 at one spot is more quickly exhausted by the larger nymphs. 



Egg. Length 0.5 mm., greatest width o.ii mm. Shape elliptical, 

 broadest one-fourth from basal end. Base rounded forming an ob- 

 tuse angle. Viewed from side one surface is slightly concave, the 

 other side gradually rounded. Tip about one-half width of egg at 

 basal fourth, with a conical cap, just below which is a constriction. 

 Subtranslucent except for apical half, which is brown. 



1st Stage Nymph. Length 0.51 mm., greatest width exclusive of 

 spines 0.16 mm. General shape elliptical, sides marginate. General 

 color of dorsal surface brown. Fine median dorsal line on head and 

 prothorax broadening out into a spot covering most of the dorsal 

 surface of the meso- and metathorax and first two abdominal seg- 

 ments. Posterior abdominal segments lighter at lateral margins. Pro- 

 and mesothorax and each abdominal segment beginning with the sec- 

 ond bears a spine on lateral margin. A pair of spines on vertex of 

 head, a pair on front and a double pair on either side of a median 

 line on top of head. A median pair on dorsum of mesothorax and on 

 second abdominal segment. Four median spines in a transverse row 

 arising from tubercles on fifth, sixth and eighth abdominal segments. 

 Each spine tipped with a secreting hair. Eyes red, not prominent. 

 Antennae white, one-third length of body bearing several compara- 

 tively long hairs. Rostrum white, one-half length of body, extending 

 beyond third pair of legs. Legs white, tinged with brown at apical 

 ends of femora. 



2nd Stage Nymph. Length 0.70 mm., greatest width exclusive of 

 spines 0.3 mm. Shape broadly elliptical, head brown. Light median 

 dorsal streak beginning on head and extending into prothorax. Outer 

 thirds of thorax brown, median third white beginning with posterior 

 half of prothorax. This light median band extends through the first and 

 second abdominal segments, which are also lighter at sides. Remainder 

 of abdomen light brown, somewhat lighter at median posterior por- 

 tion. Spines on head similar to those of preceding stage, save that 

 the pair anterior to posterior margin of head rest on tubercles which 

 also bear a few hairs. Spines on lateral margins of segments similar 

 to those of preceding stage but more pronounced. A pair of tuber- 

 cles on dorsal surface of mesothorax and fifth, sixth and eighth ab- 

 dominal segments each bearing a spine and a few hairs. A pair of 



