314 



University of California Puhlications [Entomology 



Myzus aquilegiae, n. sp. 



APTEROUS VIVIPAROUS FEMALE— VIRGOGENIA 

 The apterous female is very pretty, being of a pinkish or 

 reddish color with a very large dark brown or nearly black 

 irregular blotch on the middle of the back. The body is of 

 medium size, beset with short knobbed hairs and averaging 1.7 

 mm. in length and 0.7 mm. in width. The antennae (fig. 8, F, 

 G) arise from definite but short frontal tubercles (fig. 8, B), 



Fig. 8. Mi/zus aquilegiae, n. sji. Apterous viviparous female. A, 

 dorsal aspect; B, head and frontal tubercles; C, cornicle; D, cauda; E, 

 tarsus; F-G, antenna. (Original.) 



are slightly longer than the body, dusky throughout excepting 

 the base of article III, imbricated and supporting a number of 

 knobbed hairs. The lengths of the respective articles are : I 

 0.09 mm.. II, 0.07 mm.. Ill 0.5 mm., IV 0.4 mm., V 0.33 mm., 

 VI 0.63 mm. (base 0.1 mm., filament 0.53 mm.), total 2.02 mm. 

 The sensoria are circular and of various sizes. On article III 

 they are distributed throughout the length, but are much more 

 numerous near the middle. On IV there are usually none, but 

 one or two may sometimes occur. The usual number may be 

 found on V and VI. The following tabulation gives the variation 

 found on articles III and IV from eighteen individual females : 



