ART. 20 



THE APHID GENUS AMPHOROPHOEA MASON 



27: 



tubercles prominent. No dorsal or lateral tubercles showing on 

 head, thorax, and abdomen. Beak reaching beyond second and 

 nearly to third coxae. Cornicles not very dark, somewhat swollen, 

 distinctly reticulated, the rest of the cornicles imbricated. Cauda 

 light colored, long, conspicuously constricted, three to four sets of 

 lateral hairs. Margin of wing cloudy, but not a distinct dusky spot 

 as in rubicola Oestlund. Measurements as follows: 



Antennal measurements 



Other 7neasurements 



Apterous nymph {last instar) 



This species was taken by Davidson at San Jose, Calif., July 4, 

 1911, on thimbleberry. The collection consists of three alate vivi- 

 parous females, several alate nymphs, and one apterous nymph. 



As explained under nihi Kaltenbach, I believe the specimens which 

 Swain received from Gillette and which he described as ruhi Kalten- 



