

135 



has observed it in such numbers on roses as to cover the undersides 

 of practically all the leaves and the calyx cups of the flowers. In some 

 cases the buds were stunted and the flowers unshapely from its effect. 

 In the rose garden of the Panama-California International Exposition 

 these aphids were of considerable importance, necessitating continual 

 care to keep them under control. 



Since there is no adequate description of this species in the Ameri- 

 can aphid literature the author describes it herewith. The following 

 description was drawn from ten specimens of alate and eight of 

 apterae, collected in Santa Paula, Stanford University, and San Diego. 



Alate viviparous female. Color notes (taken from notes made 

 at the time of collection of specimens at Stanford in March, 1915) : 

 Head, antennae, and thoracic plates black. Abdomen pale apple green 

 with smoky blotch on dorsum. Legs : apical two-thirds of femora 

 smoky, basal one-third pale, tibiae pale except dusky tip, tarsi dusky. 

 Cornicles green (dusky), cauda pale apple green. 



Head is twice as wide as long with a fairly distinct tubercle on the 

 front (fig. 308). Antennal tubercles are lacking or very indistinct. 

 Antennae reach almost to the base of the third abdominal segment 

 (figs. 309, 310). Ill is the longest segment, followed by IV, spur, V, 

 and VI. The spur and IV are practically equal. Of sixteen antennae 

 examined, in three, the spur and IV were equal, in ten, IV was slightly 

 longer than the spur, while in three, the spur was slightly longer than 



IV. V is slightly shorter than the spur, and VI slightly shorter than 



V. However, IV, spur, V, and VI are all almost equal. On V and VI 

 are the usual primary sensoria, and VI the accessory sensoria (fig. 

 300). Ill is tuberculate, being furnished with a large number of 

 irregularly placed secondary sensoria (fig. 309). IV is without any 

 sensoria. The beak reaches almost to the second coxae. 



The prothorax is without lateral tubercles. The wings are normal, 

 being about twice the length of the body. The second branch of the 

 cubitus arises nearer the apex of the wing than the base of the first 

 branch (fig. 311). In but one of seventeen specimens examined was 

 the origin of the second branch of the cubitus nearer the base of the 

 first branch than the tip of the wing. In this specimen the measure- 

 ments were : 0.561 mm. from tip of wing to base of first branch and 

 0.289 mm. from tip of wing to base of second branch. 



The abdomen is long and narrow and is without lateral body 

 tubercles. The cornicles (fig. 312) are long, being but slightly shorter 

 than the third antennal segment, and over twice as long as the hind 

 tarsi. They are slightly clavate on the inner side. The cauda (fig. 



