Po.MON'A Col.I.KGK JoiRNAI. OK KnToMiH/KIY 7*i7 



spur n.dd mm. > : total O.tltil mm. I and II an- usually r'(|ual in Itii^Mh, thiiU(;li 

 the lattor is more ofton lon^fst, III is i'i|ual to IV ami V together, and VI with 

 the spur is lontiiT tiien fithor IV or V. lio.itnim — Rcadit's nearly to or slightly 

 beyond tlif socond coxa-, transparfiitly white with extreme tip dusky. Thorax 

 — Very pale green or yellow with two darker jrreen dorsjil spots. Ahilinnru — 

 Deeply sefTinented, and very routrh. due to the larjfe jflnndular tuhereles, pale 

 yellow with darker preen dorsal hand aero.s.s the liaso and a simill (freon pateh 

 just in front of the ha.se of the style. Anal plate f Figure II) as in the winired 

 fenuile. Coniiclrs — (Figure 7). Same as in winped form except that they 

 are yellow throughout. Legs — Very light yellow or transparently white 

 throughout. Style — (Figure 12^. As in winged form, hut slightly larger, 

 yellow, length 0.08 mm. 



Young — Are very light in eolor, varying from a pah- whitish or yellow to 

 light faded green. The entire hody is covered with long glandular hairs, eaeh 

 of which is situated on quite a large hody tubercle. 



Host — This spiM-ies is not [>lentiful, except in a very few instances. On 

 nearly every Alder tree (Almis rhomhifolin Nutt) there may be found a few- 

 individuals on the under sides of the leaves. On one small tree in the Santa 

 Paula Canyon there were to be found thousands, the entire lower surfaces of 

 the leaves being covered, but even here the winged individuals were very 

 scarce. The presence of the insect is easily told by the smutting of the foliage 

 of all infested trees. 



Loealiti) — On the trees growing along all of the streams in thi' vicinity of 

 Santa Paula, California. 



Dale of CnUertiou — August Hi. 1011. Serial number 27. 



MONELLIA califiirnicus n. sp. 

 I Wild walnut Plant-lonse) 



wiNctj) vmf.vRors fi:m.m,k (Figure 244. A) 



Length of the body including the style, 2 mm., width of the mesothorax 

 O.fi mm., width of the ahdr)men at widest place near the middle O.fl."? mm., wing 

 expansion 5..') mm. A medium-sized plant louse. Prevailing color — Rich saf- 

 fron yellow varying to a much lighter shade, with dark appendages. Jlead — 

 Rounded anteriorly and base straight, nearly the shape of a half circle, yellow 

 with a black longitudinal stripe venlrally at ihe base of eaeh antenna (Figure 

 1>1 and two short black stripes extending from the front backwanls between 

 the bases of the antennu'. hhiex — Large, light with red i-enters. Antennae — 

 (Figures O, 0. II) considerably longer than the body, slightly imbricated: 

 article I lemon yellow with inner a[)ical margin dark, II lemon yellow with 

 dark 'uncr margin and dark apical tip: remaining articles dark (almost black) 

 throughout : lengths : I, 0.12 mm. : IT, 0.09 mm. : III, O.fiS mm. : IV. 0..t mm. : V. 

 0.45 ?iim. : VT, 0.45 mm. (spur 0.18 mm.) : total 2.20 mm. From the.se measure- 

 ments it will be seen that I is longer than II, Til much the h>ngest, IV a little 

 longer than V, V and VI sub-eipial (IV, V and VI nearly all equal), the spur 



