532 Pomona College Journal ok Entomology 



Tliis species corresponds exactly with the one by Thomas in his Eighth 

 Report of the Ent. of Illinois, p. 95, 1880. It is strange to note that it does not 

 appear to be the species described as Aphis nerii by Kaltenbach (Men. Pflz. pp. 

 118-119). his species being darker and with green markings. I do not have the 

 description of Fonscolombe, so can not compare it with the original, but take it that 

 it is his species. 



Chaitophorus salicicola n. sp. 

 WINGED VIVIPAROUS FEMALE (Figure 173 B) 



Length of body 1.(5 nnii.. width of mesothorax 0.5 ram., greatest width of 

 abdomen 0.69 mm., wing expansion 5.25 mm. 



Prevailing color — Very dark olive green to black. Entire body covered with 

 fine hairs which are situated on small tubercles. Head — Black, narrower than 

 prothorax, slightly wider than long. Eyes — Dark reddish-brown. Antennae — 

 (Figure 173 e). Reaching to middle of abdomen, articles I and II color of head, III 

 yellow, remaining articles dark, normally haired, lengths of articles: I, 0.06 mm.; 

 II, 0.08 mm.; Ill, 0.31 mm.; IV, 0.17 mm.; V, 0.15 mm.; VI, 0.35 mm. (spur 

 0.25 mm.), total 1.12 mm.; four or five large circular sensoria on article III. 

 Rostrum — Reaching to second coxa-, light yellow with base and tip dusky. 

 Abdomen — Plainly segmented, dark with lateral dorsal margins and a narrow 

 strip between each segment olive green, ventral surface olive green with lateral 

 margins somewhat darker, iiairy. Cornicles — (Figure 173 e). Truncate, much wider 

 at base than at mouth, nearly as wide as the length, mouth slightly flared, length 

 0.08 mm., width at base 0.07 mm., dark olive green. Legs — Normal, hairy, coxae 

 dark; femora of first pair light, of second and third pairs dark; tibiee light with 

 bases and tips dark; tarsi dark. JVings — Hyaline. Primary — Length 2.4 mm., 

 width 0.8 mm., costal and subcostal veins well developed; stigma nearly oval in 

 shape, length 0.5 mm., width 0.1 mm., rich olive green; stigmal vein well curved, 

 arising near apical end of stigma ; first and second discoidals nearly straight, 

 arising 0.075 mm. apart; first branch of third discoidal arising one-third and 

 second branch arising two-thirds the distance from the base of the discoidal to the 

 end of the third branch; all veins olive green in color. Posterior — Length 1.5 mm., 

 width ().!■ mm., normal. Style — (Ventral side Figure 173 a). Short, conical, 

 longer than tarsi, olive green. 



APTEROUS VIVIPAROUS FEMALE (Figure 173 A) 

 Length of body 1.5 mm., width of abdomen 0.9 mm. Very narrow at head, 

 gradually widens posteriorly to middle of abdomen and then rounds off rather 

 abruptly. 



Prevailing color — Dark olive green or dusky brown with light yellow longi- 

 tudinal band on the middle of the dorsum extending from base of the head to the 

 posterior end, lateral margins lighter in color than is the general body color. 

 Head — Dark with yellow area at widdle of base on the dorsum. Eyes — Dark 

 reddish brown. Antennae- — (Figure 173 f). Reaching nearly to the middle of the 

 abdomen, hairy, articles I, II, apical one-third of IV, V and VI dusky, III and 

 basal two-thirds of IV light yellow, lengths of articles: I, 0.08 mm.; II, 0.07 mm.; 



