THE CANADIAN ENTOMOLOGIST. 43 



have therefore placed the species in the genus Phyllaphis. where it seems 

 more nearly to belong. 



It seemed as though the stem mother must be the immediate parent 

 of all the colony in each gall, but she probably was mother of the vivipa- 

 rous alate females only, and these probably gave birth to the true sexual 

 forms. 



Stem-mother : Plate I, figs, i and 4. 



General colour varying with age, the older specimens being darkest. 

 The lght-coloured specimens are dull sordid yellow, with transverse 

 broken bands of very dark olive green over a large portion of the abdomen. 

 The o'der and darker specimens appear almost entirely black. The head, 

 antennas, entire legs, including coxa?, and genital plates, dark brown to 

 blackish in colour. The legs and antenme are very short and stout. The 

 femora of the hind legs do not exceed in length joints 3 and 4 of the 

 antennae combined. General shape of the body stout pyriform, the older 

 specimens being very much truncated posteriorly. Length varying from 

 1.25 to 1.50 mm.; width varying little from 1 mm.; joints to the antenna 

 four ; the 4th joint having an unguis which is about half as long as the 

 short 4th joint; joint 3 a little less than half the whole length of the 

 antenna. There are no visible sensoiia except one at the base of the 

 unguis, and I cannot make out any transverse annulations upon joints 3 

 and 4 except as indicated by minute stout hairs arranged in transverse 

 rows. 



The body is sparsely set with rather stout hairs ; the entire surface 

 above and the antenna? are also closely set with very short stout hairs, 

 giving it a velvety appearance ; vertex convex, slightly bilobed ; cornicles 

 very slightly raised above the surface, located about midway on the 6th 

 segment, and surrounded by a dark area; cauda subobsolete ; beak just 

 attaining middle coxae. In dark specimens of the louse the cornicles are 

 often difficult to see. 



Pupa. 



Very light to dark green in colour. In each gall there are a few 

 pupae smaller and lighter coloured than the others, which I take to be the 

 males. Wing-pads of the female pupse blackish ; length of female 

 pupa before last moult 1.80 to 2 mm.; antennae 6-jointed, joint 3 longest 

 and about equal to joints 4 and 5 together. 



Alate Oviparous Female : Plate I, figs. 3 and 6. 



General colour of body dark olive green, with head and lobes of 



