Pomona College Joihnal ok F.stomoloov 727 



Siifle — (I'ifjiiri' 2.S^, l.S). Distiiu'tly globular with small ni-ck and witir Imsc ns 

 in winged .s|«-cinu-n.s, Vfllow, hairy, It-ngth O.oy nun., width or dianntcr of knoli 

 O.Oj;") nun., width of base O-OS,') mm. 



Young — (Figure 'l'.'>\ ('). Tin- first horn are pale yellowish green without 

 eolor markings at all and with transparently white antennii* and legs. The older 

 forms gr.'ulually assume the distinct dorsal markings either reddish or green with 

 vi-llow spots until they have become as described under the adult forms. In some 

 of these the style is pinkish instead of yellow. 



Iloti — Found only on the upper surfaces of the tender, but most often on 

 till' older leaves of the common wild Cottonwood (I'lipului Irirhuiarpa T. & (i.). 

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

 gri-at quantities of the black fungus. .\11 infested trees are easily told by their 

 dirty black appearance. The insect is able to cling to the surface of the li'aves 

 with a reniJirkable tenacity and it is almost impossible to jar or shake them ofT. 



I.oralili/ — Obtained on cottonwoods growing along the .*^;inta Clar;i River 

 fri>m Santa I'aula to .Sespe and .ilong the .Srspe Hivcr far up into tin- eaiiyon at 

 an altitude of 2000 feet. 



Dale of Collection — First t.-iken in the Sespe Canyon May 20, whc-re it oc- 

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

 August i and still shows up in coiisider.iblr niMiibcrs .it this d.-ite (.Sept. I.'>, l!)ll). 

 .Serial number Iti. 



Symdobius macrostachyae n. sp. 

 wiNtiKO vivii'Miins KKMAi.K ( l-'igure 2.'!.'t .\) 



Length of body ','.■,' mm., width of the mesothor.-ix 0.7 nnn., width of the 

 .'dxlomeii O.J) mm., wing exjiansion (i nnn. Hotly — Medium in size, rounde<l, hairy. 

 Prevailing Color — Bbtck or very dark, shiny or dull. Ileail — Large, much wider 

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

 black with light transverse basal band. Kyrs — Three large red ocelli on the 

 dorsum of the head. Compoinid eyes Large, red, with tuln-rcles. Antennae — 

 (Figure 2,'<.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 Ixnly), 

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

 1 1 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.;U) mm.; IV. 0.18.S mm.; V. 

 0.17'! mm.; VI, 0.2(i mm. (base O.LS mm., spur O.LS mm.); total M l(i mm. I 

 and II usually snbcqual though the first is often longer and always widi-r. Ill 

 is by far the longest article, being nearly twic«' as long as W . mori- than twice 

 as long as \'. and more than twice as long as the spur of VI, IV longer than 

 V, \'I with Iwise 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: .\bout 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. Roilrum — • 

 Heaches to, nearly to, or slightly beyond the tip of the abdomen, dusky yellow 

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



