434 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



taries and tail of color of body; no lateral tubercles on body; hairs of 

 antennae, head, body and legs capitate; nectaries rather short." 



Other sendings were received from Troop and recorded by Per- 

 gande on the following dates: August 1, 1904, August 25, 1904, 

 October 6, 1904, May 15, 1905, and May 22, 1905. Under this last 

 date Pergande made some color notes on the live alate form as follows : 

 "The abdomen of the migrant is of a light glassy, bluish-green color, 

 the head and thorax brownish-yellow with the thoracic lobes somewhat 

 darker." 



Three other records of the species have been made. Davis' (1910) 

 recorded the species from Illinois and figured the sensory characters 

 of the alate form, while Davidson^ (1914) recorded the species doubt- 

 fully from California. These two workers have since written that the 

 insects described by them were not this species. The third record is 

 that of Headlee^ (1916). 



On May 12, 1916, Mr. F. L. Simanton reported an aphis injurious 

 to the Houghton gooseberries at Benton Harbor, Mich. Specimens of 

 this species were submitted on May 22nd and proved to be houghton- 

 ensis. Mr. Ackerman forwarded young stem mothers from this same 

 locality in the spring of 1917 and from these young rearing experiments 

 were begun. 



Eggs 



The specimens received were upon small infested shoots and indi- 

 cated that the eggs, the shells of which were present, are laid upon 

 the bark under the loose folds which extend down the twig. Later 

 twigs were received with many eggs still unhatched and these showed 

 that the usual position is under the loose bark though eggs are also 

 laid about the bases of the buds and occasionally upon the thorns. 

 The eggs hatch about the middle of April. 



Stem Mother 



As soon as the young stem mothers are hatched they wander to the 

 young opening leaves to feed and place themselves either on the under 

 surface of the leaves or upon the petioles. The leaves immediately 

 begin to curl and before long entirely enclose the stem mothers and any 

 young they may have produced. In our experiments a young stem 

 mother which began feeding on a leaf May 1 was by the 10 th entirely 

 enclosed by the rolled up leaf. By this time she had produced several 

 young but only one remained on the curled leaf with her, the others 

 migrating to new leaves. 



1 Jr. Econ. Ent., Vol. Ill, p. 485. 

 » Jr. Econ. Ent., Vol. VII, p. 132. 

 ' Rept. of the Entomologist of New Jersey for 1915. 



