108 Journal New York Entomological Society. [Voi. xvii. 



were very numerous on the leaves of the garden columbine, Aqidlegia 

 vulgaris L., during September, 1908. They preferred the under sur- 

 face of the leaves, although many individuals also occurred on the 

 upper surface. A species of Alacrosiphum was abundant on the stems 

 of the same plants, and was also often mingled with the Hyaloptcnts 

 in the same colonies. 



On separating the specimens of these two species, which had been 

 collected together on September 25 I was struck with the similarity 

 of the Hyalopterus to specimens taken on rose bushes September 29, 

 which were standing within a i^w rods of the columbines. These 

 winged viviparae proved to be identical in structure and markings with 

 those from the columbines. There was one winged male of this genus 

 among them, its conspicuous genitalia allowing no doubt of the sex. 

 This discovery led me to suspect that the viviparas collected on the 

 roses might be sexuparae from the Aqiiilegias. On looking up the 

 literature I found that the migration from the rose to the columbine in 

 May had been observed by Francis Walker in England fully sixty years 

 ago. He states that it feeds " equally on the upper surface and on the 

 under surface of the leaf, which often becomes red or purple from its 

 injuries. It continues on that plant till the end of October." I did 

 not notice that these aphids had any injurious effect on the leaves last 

 fall. They are rather sluggish in their movements as compared with 

 the active Macrosiphiuns. It is to this sluggishness that Walker doubt- 

 less refers in describing the species as having "a very quiet disposition." 



On May 19, 1909, I found many green, lightly pulverulent aphids 

 of this species on the tender shoots of the cinnamon rose, Rosa cin- 

 namomea L. standing near the clumps of columbines. There were a 

 few wingless adults beginning to deposit young, but most of the 

 aphids were well advanced larvae and these with the adults were in all 

 probability the stem-mothers. The infested shoots and leaves did not 

 show any injurious effect. Thorough examination was made of the 

 columbines without finding any specimens of Hyalopterus, although 

 there were many Macrosipliums. It is evident then that the hiber- 

 nating eggs had been deposited on these roses last fall, which are 

 therefore the primary host of the insect. We may expect to see the 

 migrants from the roses establishing their broods on the columbines 

 in June in this latitude. Evidently the winter eggs may, under some 

 conditions, be deposited on the columbines, for Koch (1857) ob- 

 served the isolated adult stem-mothers depositing larvae on the leaves 



