APHIDID/E OF SOUTHERN CALIFORNIA IV 



E. O. ESSIG 



Aphis gossypii Glover 



Winged Viviparous Female (Kig. 96 A) — Length 2 mm., width 0.7 mm. ; 

 wing expansion, 7.8 mm. Prevailing color — dark slate, Init a wooHy secretion 

 gives it a whitish appearance. In mounted specimens the general tone is dark- 

 brown ; the thorax darker than the abdomen, which may even appear green. 

 Head narrower than thorax, twice as wide as long. Compound eyes coarsely 

 grannlatcd, red, with prominent terete tubercles just behind the outer margins. 

 These tubercles extend at right angles to the margin. .Intcnnac (Fig. 96 B) 

 do not arise from frontal tubercles, two-thirds as long as the body, 6-articled. 



Figure 9S. Aphis gossypii. 



The color is dark, respective lengths as follows: I 0.06 mm., II 0.06 mm., 

 Ill 0.5 mm., IV 0.2 mm., V 0.15 mm., VI 0.3 mm. The sensoria are dis- 

 tributed very freely over article III and sparsely over I\'. There is one on V 

 and several marginal in the nail-like process of VI. All articles are somewhat 

 hairy. Prothorax — with a small lateral tubercle. Rostrum — reaches to meso- 

 thoracic coxae. Abdomen — covered with a cottony wax, which gives it a 



