WOOLLY Al-HIDS OF THE ELM. 



20=; 



parent place varying in shape and size on III that seems 

 to be a vestigial indication of another joint. Indeed 6-jointed 

 antennae for this form are by no means rare and it sometimes 

 happens that a specimen will have one 5- jointed antenna and the 

 other distinctly 6-jointed. (33-13 J. 



Fig. 125. The antenna of the rosette aphid, second genera- 

 tion, apterous viviparous. (33A-13). Typically this has III 

 as long as or longer than IV-[-V-|-VI, and' in this respect resem- 

 bles the antenna of the winged form of this species. 



Fig. 126. Antenna of spring migrant from rosette, — one of 

 the collection whose progeny colonized the seedling mountain 

 ash as shown in Bulletin 217, Fig. 69. (57-13)- 



Hraniniiiri 



Figs. 127 and 128. Antennae of spring migrants from rosette 

 collected July 10, 1912, from under side of mountain ash leaf 

 in the open where they were settled and producing progeny. 

 (See Fig. 78, Bulletin 217) Ordinarily VI is without annula- 

 tions but these sometimes are present as is shown in Fig. 128. 

 (60-12 ). 



Fig. 129. Antenna of fall migrant collected from hawthorn, 

 Crataegus. ( 1 14-06) . 



