Pomona College Journal of Entomology 727 



Sli/lr — (I''ijjuri' 'i.'iiJ, 1,'i). Distinctly ij,li)l)ul.ir with small nrck .-uid widt- base as 

 in winged .specimens, yillow, li.iiry, lengtli u.u'J nnn., width or diameter of knob 

 O.O.J") mm., widtli of base 0.08.') nnn. 



Youiiii — (l''igure '2.'i I C). Tlie first Ixirn .-ire p.-ilr yellowish green without 

 color m;irkings at all .and with tr.ansp.irently white .mtennic .and legs. The older 

 forms gr.adu.ally assume the distinct dors.al m.arkings either reddish or green with 

 yellow spots until they have become as described under the .adult forms. In some 

 of these the style is ])inkish instead of yellow. 



Iloxf — Found only on the upiier surfaces of tlie tender, but most often on 

 the older leaves of the counuon wild Cottonwood {Populus frichoriirpa T. & G.). 

 It is never a stem feeder. A great producer of honey-dew upon which grows 

 great quantities of the black fungus. All infested trees are easily told by their 

 dirty black appearance. The insect is able to cling to the surface of the leaves 

 with a remarkable tenacity and it is almost impossible to j.ar or shake them off. 



Loraliiii — Obtained on cottonwoods growing along the Santa Clara River 

 from Santa Paula to Sespe and along the Sesjie River far uj) into the eanvon at 

 an altitude of 2000 feet. 



Date of Collection — First taken in the Sespe Canyon May 20, where it oc- 

 curred in great numbers on a single small tree. Again collected at Santa Paula 

 August 1 and still shows up in considerable numbers at this date (Sept. \5, 1911). 

 Serial number 16. 



Symdobius macrostachyae n. sp. 

 WINGED VIVIPAROUS FEMALE (F'igure 233 A) 



Length of body 2.2 mm., width of the niesothorax 0.7 mm., width of the 

 abdomen O.f) nnn., wing expansion 6 mm. Bodif — Medium in size, rounded, hairy. 

 Prevailiiiij: Color — Black or very dark, shiny or dull. Head — Large, much wider 

 than long, broad across the front between the anteiinip, hairy, very dark green to 

 ])lack with light transverse basal band. Ei/es — Three large red ocelli on the 

 dorsum of the head. Com))ound eyes large, red, with tubercles. Antennae — 

 (Figure 2.'i.S C and D). Not on frontal tubercles, bases far apart, reaching to 

 the third .abdominal segment (a little more than half the length of the body), 

 with long curved spines or hairs, three apical articles imbricated, articles I and 

 II nearly as dark as the head, remaining articles amber brown to nearly black. 

 Lengths of articles: I, 0.07 mm.; II, 0.07 mm.; III. 0.36 mm.; IV, O.IS.S mm.; V. 

 O.I7,S nnn.; VI, ().2() mm. (base 0.13 mm., spur 0.13 mm.); total 1 . 1 Hi mm. I 

 and II usually subecjual though the first is often longer and always wider. III 

 is by far the longest article, being nearly twice as long as IV, more than twice 

 as long as V, and more than twice as long as the spur of VI, IV longer than 

 V, VI with base and spur equal in length, in not a few instances the spur is 

 slightly the longest. The sensoria are large, circular, irregularly arranged, and 

 situated as follows: About seventeen on III, usually two within the apical half 

 of I\', one on V, and the usual ones at the base of the spur of VI. Rostrum — 

 Reaches to. nearly to, or slightly beyond the tij) of the abdomen, dusky yellow 

 with dark base and tip. Prothorax — Considerably wider than the head, but not as 



