ART. 20 THE APHID GENUS AMPHOROPHORA MASON 61 



The alate male and oviparous females just described were taken 

 by Dr. A. C. Baker on wild raspberry. No viviparous forms were 

 taken, but I feel certain that the specimens must belong to this 

 species. 



Biology. — But little is known of the biology of this species. It is 

 found on the leaves and shoots of various species of Ruhus. Dr. 

 Edith M. Patch took an alate female with eight nymphs on wild red 

 raspberry on August 1, 1906, in Maine. In Minnesota Pergande 

 took apterous females and nymphs on July 14, 1903. In California 

 Shinji took alate and apterous viviparous females on March 20, 1915, 

 at Berkeley; Essig found them at the same place on March 29, 1916, 

 at which time "there were also a number of young pink forms not 

 observed during the summer"; he also found the species abundant 

 on May 24, 1916; Davidson took them in the hilly canyons of Contra 

 Oosta County, on May 13, 1913 — ''at that date about 95 per cent 

 of the lice were large pupae or recently transformed adults." Ross 

 took alate and apterous forms at Ottawa, Canada on July 21, 1917, 

 and Wilson at Vancouver, British Columbia, on July 12, 1915. 



Shinji took his males at Berkeley, Calif., on April 4, 1915. Oest- 

 lund found them in Minnesota " as late as November first, together 

 with the oviparous wingless females." Baker took the sexes de- 

 scribed above at Guelph, Ontario, October 10, 1910. 



Distribution. — From Maine to California; Ottawa and British 

 Columbia. 



Host. — Ruhvs. 



Cotyi)e. — Oestlund's collection. 



AMPHOROPHORA SENSORIATA Mason 



Figs. 158-163 



Amphorophora sensoriata Mason, Proc. Ent. Soc. Wash., vol. 25, No. 9, 

 1923, p. 188. 



As explained under rubi Kaltenbach, this is the species mentioned 

 by Gillette as differing from rubi. It seems to be rather common on 

 this continent and has no doubt often been confused with ruhi. 

 So far as I know, it is not found in Europe, the type continent of 

 rubi Kaltenbach. 



It is easily distinguished from ruhi by the sensoria on IV and V 

 of the alate, by the larger number of sensoria on III in both the 

 alate and apterous forms, by the shorter hairs on the antenna, by 

 the shorter cornicles, and by the smaller number of hairs on the 

 Cauda. 



Alate viviparous female. — Large species. General color green. 

 Antennae longer than body, dark colored, imbricated, hairs incon- 

 spicuous, much smaller than in ruhi, numerous sensoria on III, IV, 

 and some on V. Antennal tubercles large. Beak very short, in 



