594 PoMON,A College Journal of Entomology 



stignia long ;iiid narrow, light yellowish green, stigmal vein well curved 

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

 from the bodt) ; first and second discoidals nearly stfaight ; third diseoidal 

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

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

 color. Secondary — Length '2. 1 mm., width O.fi.'i 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 191 m). Ensiform, hairy, color of body or slightly dusky, length O..^^ mm. 



APTEROUS VIVIPAROUS FEMALE (Figure 193 B) 



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

 1.S5 mm. Larger and more robust than the winged form. 



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

 tennae — (Figure IQ* b). On rather prominent frontal tubercles (more prominent 

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

 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 

 ,S.25 mm.; there are three or four circular sensoria on article III (Figure 191' b). 

 Rostrum — Reaching just beyond second coxa?, 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 19'' 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 ui)on 

 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 entirel)' 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 nearlj' 

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

 species from Lindsay, Tulare County, Cal. (Jr. Ec. Ent. Ill, p. 380, 1910). 



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



In 1880 \Vm. Ashniead described several forms under the heading of this 

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

 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, with dark eyes ,ind glass}' 

 white antennae and legs. 



