108 



India.t Museum Notes. 



Vol. III. 



NOTES ON INDIAN APHIDiE. 

 BY G. B, BUCKTON, F.R.S. 



Oregma hnmhti&a} Bnckton, 



Winged female. — Body wholly blade Head moderate^ without 

 marked cornua. Eyes obvious, antenna?, about one-thiid the length of 

 the body. Five-jointed, the apex minute. The third joint iniuh the 

 loncrest and noore than double the length of the fourth, both tiiese and 

 the fifth joints numerously ringed, as in Schizoneura. Rostrum short. 

 Wings ample, membrane rather fuscous. Cubitus with a marked punc- 

 tured stigma. Cubical vein once forked and not confluent with the 

 cubitus. Lower wings normal. Candal end bilobed. 



The small and younger larval forms have the two cornua below the 

 vertex much produced^ as shown in figure VI. 



This aphis appears to infest the bamboo throughout British India, 

 the somewhat smaller specimens taken in the North-Western Provinces 



' This species of SchizoneuriiiEe was originally described on page 87 of this volume 

 from specimens of the apterous form taken in Dehra Dnn, North-West Provinces. The 

 winged female, whicli is now described for the first time, was taken by Mr. E. E. Grpeu, 

 upon "the cultivated yellow-stemmed bamboo" in Ceylon. Mr. Green notices that 

 ftlthongh the apterous form is sometimes so abundant as to completely cover the surface 

 of the bamboo slioots, the plant does not appenr to be injured to any very great extent. 

 He adds that in life the wini^less form is of a dull state grey colour slightly obscured by a 

 whitish blo(mi, the gravid females having a cushion of white meal upon the extremity of 

 the abdomen. The winged form, on the other hand, is so dark iu colour as to be ahnost 

 black, and is without any whitisli bloom. 



