Feb., 'o6] 



ENTOMOLOGICAL NEWS. 



59 



r 



A New Aphid. 



By James Troop. 

 Aphis houghtonensis n. sp. 



During the summer of 1904 plant lice were discovered to be 

 very abundant in a field of Houghton gooseberries, near the 

 city of Indianapolis. The peculiar manner in which they 

 worked attracted attention, and specimens were taken and 

 sent to Dr. L. O. Howard, at Washington, who pronounced it 

 a new species. Drawings were accordingly made by Mr. 

 Heidemann of the Division of Entomology. 



Fig. 1. 



In the field of gooseberries mentioned, there were scatter- 

 ing plants of another variety and it was noticed that none of 

 these plants were infested by the Aphis. I then made several 

 attempts during the summer of 1904 and also 1905 to colonize 

 them on various other varieties of gooseberry, but in no case 

 did I succeed in inducing them to feed. They multiplied so 

 rapidly, however, upon the Houghton, that the owner was 

 obliged to give up the fight, after two seasons' experience, 



