348 JOURNAL OP ECONOMIC ENTOMOLOGY [Vol. 2 



Winged male (?). — The male as described is questionable. Many small- 

 bodied individuals were found on the plants with the winged and wingless fe- 

 males. On account of the size of the abdominal cavities, which would not seem 

 to permit the development of young, the small individuals were taken to be 

 males. 



Fig. 8. — Pentalonia mgronervosa, wingless viviparous female, enlarged 

 (original). 



General coloration of parts same as in winged female, but antennae without 

 dusky tips. Antennal segments 2, 3 and 4 together as long as 7, which is 

 long and slender, with a single short bristle at the tip. 



The average measurements of five specimens are as follows : Length of body, 

 1.09 "™; width, .45 >"•"; length of antennal segments, (1) .07 """, (2) .06 '"™, (3) 

 .36 ™™, (4) .23 ™™, (5) .20 ™"\ (6) .07 '""\ (7) .64 ™m; total length, 1.63 '"'"; length 

 of wing, 1.8 ™'"; width of wiug .70 """. 



Pupa. Similar to the wingless female and with gray wing-pads. 



An ant, Prenolepis parvula Mayr, a common species about the department 

 greenhouses, is an attendant on this aphis. 



AN APHIS OCCURRING ON ANGELICA AND IVY 



Aphis angeliccB Koch 



Specimens of Aphis angelicce Koch have been received by the 

 Bureau of Entomology on numerous occasions for determination, but 

 there is as yet no published record of its occurrence in the United 

 States. Koch gives as its food plant in Europe Angelica sylvestris. 

 In California it is recorded from Angelica sp. and ivy. 



