144 ENTOMOLOGICAL NEWS. [April, '08 



nearly adult and were probably the stem mothers. During 

 the earlier part of the year it required twelve to fourteen days 

 for them to become mature, but later in the warmer summer 

 months the period for maturity was much shorter. The num- 

 ber of young per female was, in two instances, 106 and 109, 

 respectively. The length of time required to give birth to 

 these young were 15 and 21 days respectively, or an average 

 of 7 plus in the first case and 5 plus young per day in the 

 second. 



The lice were evidently partial to the young tender shoots, 

 but later in the summer when these became crowded, some 

 of the aphids were obliged to secure their food supply from 

 the leaf petioles or the undersides of the leaves. 



The first adult winged form was noticed May 21 st, it hav- 

 ing been born May gth or loth. The lice continued to in- 

 crease in numbers until about the middle of July, but from 

 then until about August I2th, only occasional specimens were 

 found, the others having become winged and having prob- 

 ably migrated to other places. They began to be more num- 

 erous, however, August I2th, and by August iQth were com- 

 paratively abundant, most of them being immature individ- 

 uals. This second appearance of the aphids in numbers was 

 not due to return migrants, but rather to the progeny pro- 

 duced by the few wingless forms that had remained. I was 

 unable to follow up the appearance of the bisexual genera- 

 tion, but when examinations of the vines were made the first 

 part of October, wingless oviparous females and winged males 

 were found in copula, and also a few eggs deposited upon 

 various parts of the vine. Later in the fall but occasional 

 eggs could be found upon the vines and I concluded that the 

 ant (Cremastogastcr lineolata) had carried them to its nest. 

 From the very first appearance of the aphids and throughout 

 the summer this ant had been in constant attendance upon 

 them. The lice secreted, from the anus, a somewhat milky 

 fluid which soon became more or less solidified. Upon the 

 parts of the plant occupied by the lice many of these globules 

 were usually found. 



