Pomona College Journal of Entomology 703 



APTEROUS VIVIPAROUS FEMALE (Figure 223 B) 



I.cngtli of naked body 2.9 nun., width 1.3 mm. When covered with the long 

 flocculence the measurements are nearly twice as great. Body — Entirely covered 



with long white or bluisli-wliite fioceiileiiee. PreraUiiig roloi Naked body of living 



specimens dull green, of mounted specimens rich j'ellow. Head — Light green with 

 median brown spot on the frontal between the antennae, somewhat triangular in 

 shape with base widest and the front straight, but narrow. Eyes — Each com- 

 posed of a group of three ocelli which resemble a compound eye, the background 

 of which is red (Figure 223, 4). Antennae — (Figure 223 D3). Reaching nearly 

 to the middle of the abdomen, slightly imbricated, with very few hairs, brown 

 throughout with articulations lighter, (in mounted specimens they appear brown 

 or even amber). Lengths of articles: I, 0.11 mm.; H, 0.15 mm.; Ill, 0.32 mm.; 

 IV, 0.17 mm.; V, 0.22 mm.; VI, 0.21 mm. (spur 0.04 mm.); total 1.21 mm. 

 Article II is usually longer than I in the apterous form, being nearly a fourth 

 longer; III is the longest, being more than twice as long as II, and nearly three 

 times as long as I, but not twice as long as IV, though very nearly so; IV is 

 shorter than III, V or VI ; V is much longer than IV and nearly as long at VI. 

 The spur or unguis of the apterous female composes about one-sixth of the article. 

 Sensoria at the apical end of V and in the process of VI. Rostrum — Reaches to 

 or slightly beyond the third coxae, light green or yellow, with brown base and tip. 

 Prothorax — Green with a brown marginal spot on the front side, little wider 

 than the head. Mesothorax — With a similar brown spot on each front margin. 

 Entire thorax otherwise green. Abdomen — Smooth, light green. Entire body 

 traversed by four longitudinal rows of large oval glandular spots, which are eon- 

 colorous with the body. These occupy nearly all of each abdominal segment on 

 the dorsum. Anal jilate sometimes projecting beyond tip of abdomen, brown. 

 Cornicles — Wanting. Legs — As in the winged form. Style — (Figure 223, 3). 

 Blunted, base much wider than the length, brown. 



Young — Covered with the long white flocculence from a very early stage, 

 a few may be seen to be naked. The body is a pale light green. 



Host — This insect feeds on the California Wild Buttercup (Ranunculus 

 californicus Benth) and collects in great numbers on the stems, at or slightly 

 below the surface of the ground. In a few cases individuals were observed feed- 

 ing on the stems a few inches above ground and on the undersides of the older 

 leaves which lay on the ground. They are usually grouped in quite large colonies 

 which are easily reeognixed by the large surplus of tlie white flocculence which 

 has been rubbed from various individuals. As soon as disturbed each insect 

 immediately lets go its hold and seeks shelter among the particles of earth or 

 leaves. Small, white, elongated eggs were also observed on various parts of the 

 stems. 



Locality — Collected by the writer on a small hill where the buttercups were 

 growing plentifully under the shade of the live oak trees, near Nordhoff, Cal., 

 at an altitude of 450 feet. W. M. Davidson has collected tliis insect in the vicinity 

 of Stanford University, Palo Alto, Cal. 



Date of Collection — April 29, 1911- Serial number 31. 



