52 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



There are from 1 to 3 small sensor ia near the base of III. 

 Cornicles same as in winged forms, 0.63 mm. long. Cauda 

 dusky, 0.36 mm. long. 



Nymphs — Pale green with dusky legs and antennae. 

 Host plants, Localities, etc. — The species has been taken 

 on a number of occasions as follows : 



1. On Habumokuren, Magnolia conspicua Salisb., Nishiga- 

 hara, Tokyo, May 12, 1913. Collection number 30. 



2. On Karalachi (trifoliate orange), Poncinis trifoliata Raf. 

 (listed as Aegle sepiaria DC. or Citrus trifoliata Linn.), 

 Nishigahara, Tokyo, May 15, 1913. Collection number 

 42. 



3. On orange, Shizzuoka-Ken, May 18, 1913. Collection 

 number 50. 



4. On Karalachi and on Asagao, Ipomoca hederacea Jacq. 

 listed as Pharbitis hederacea Jacq.), Tokyo, May 22, 1913. 

 Collection number 51. 



Rhopalosiphum nymphaeae (Linn.) 

 Figure 12 



This species is apparently quite common in the vicinity of 

 Tokyo, having been taken on a number of host plants as fol- 

 lows: 



1. On Ume (Japanese apricot), Pruniis nmme S. & Z., 

 Komagome, Tokyo, May 9, 1913. Collection number 8. 



2. On Ume, Nishigahara, Tokyo, May 11, 1913. Collection 

 number 17. 



3. On plum, Nishigahara, Tokyo, May 11, 1913. Collection 

 number 18. 



4. On Japanese pear, Nishigahara, Tokyo, May 11, 1913. 

 Collection number 19. 



5. On peach, Nishigahara, Tokyo, May 11, 1913. Collection 

 number 21. 



6. On Kuwai (old world arrowroot), Sagittaria sagittcufolia 

 Linn., and on Hasu (East Indian lotus), Neliimbo nucifera 

 Gaertn., Tokyo, June 23, 1913. Collection number 91. 



