594 Pomona College Journal of Entomology 



stigma long and narrow, light yellowish green, stigmal vein well curved 

 and arising from the stigma at its widest point (just beyond the middle 

 from the body); first and second discoidals nearly straiglit; third discoidal 

 nearly straight, first branch slightly curving downward, second branch arising near 

 the middle of the branch. All veins except those already specified are amber in 

 color. Secondary — Length iA mm., width 0.65 mm.; subcostal curved upward 

 near the tip, first and second discoidals straight and arising one-third and two- 

 thirds respectively, the distance from base to tip of subcostal ; amber. Style — • 

 (Figure 19^ m). Ensiform, hairy, color of body or slightly dusky, length ().,S'2 mm. 



.-vpTERous VIVIPAROUS FEMALE (Figure 193 B) 



Length of body not including the style 2.6 mm., greatest width of abdonun 

 1.35 mm. Larger and more robust than the winged form. 



Prevailing color — Bright, shiny green. Head — Yellow. Eyes — Red. An- 

 tennae — (Figure 19i b). On rather prominent frontal tubercles (more prominent 

 than those of the winged form), longer than the body, slightly hairy, articles J 

 and II color of the head. III dusky with light base, remaining articles dusky 

 throughout, the lengths of the articles are as follows: I, 0.12 mm.; II, 0.08 mm.; 

 Ill, 0.79 mm.; IV, 0.65 mm.; V, 0.59 mm.; VI, 1.2 mm. (spur 0.86 mm.) ; total 

 3.25 mm.; there are three or four circular sensoria on article III (Figure 19't b). 

 Rostrum — Reaching just beyond second coxap, dark at tip only. Thorax — Widen- 

 ing from the prothorax to the abdomen, yellowish green. Abdomen — Smooth, shiny 

 green, with or without red dorsal spots. Cornicles — Same shape as those of the 

 winged form, basal one-third or half green with remainder dusky, length 0.97 mm. 

 Style — (Figure IQl n). Ensiform, hairy, green with margins slightly dusky, 

 length 0.6 mm. 



Young — Young are green and greatly resemble the adults in all characters. 



Host — Found abundantly feeding on young seedling orange trees and upon 

 the tender shoots and suckers of old seedling orange trees. Not taken on Valencia 

 trees or on lemon trees, although it is not improbable that this insect does feed 

 upon them as well as upon the seedling trees. The young shoots and buds may 

 become so badly infested as to be entirely killed in a few weeks and care must be 

 taken to keep this insect in check. Due to its green color it is seldom noticed until 

 the twigs are beginning to show .-m unhealthy color. 



Locality — Santa Paula, Cal. This insect has also been collected from nearly 

 every citrus-growing section in Southern California. Wm. Davidson reports this 

 species from Lindsay, Tulare County, Cal. (Jr. Ec. Ent. Ill, p. .'i80, 19IO). 



Date of Collection — April 7, 1911- Serial number 25. 



In 1880 Wm. Ashmead described several forms under the heading of this 

 insect, some of which were certainly not of this species, but were of the spcoiis 

 Aphis gossypii Glover. His description is as follows: 



"From observations made this year I find that from an egg laid by a fall 

 oviparous female, which I described as follows : 



" 'Young — Length .02 inch. Dark greenish brown, witli dark eyes and glassy 

 white antenna' and legs. 



