Pomona C'oi.i.eoe JniiiNAi. ok Entomoloov 600 



(rails rloiiffati- oval, antiiiiia' siiioiitli uitlioiit (listiiicl Iransxcrsc- 



scnsoria. populilranMrrrMiin 



(i. l-'ortiiili^ psciKJofjalK caiisin;; tin- upper snrfafis of tin- lra\rs to fold 

 to)i<tliiT aloiifj tlic mid-rilis; anlcniial arlicli-s I IF, I\', V ami \'l 

 with transversa seiisoria, spur or unguis with i-onstrii-ted neck. 



popul'uonduplifoliuii 

 t'urliiij; till- leaves or on the youMf;er stems close lo the ^rouiiti : trans- 

 verse sensoria cuily on articles III anil l\', uiii;wls without constrict- 

 ed neck. f riixini-dipvtnlae 

 I', hftae Ooanc. On common hcct {lii-lii vulfiaris I,.). First rcporti-d by 

 Clarke on Hcct, Red Dock, and C'anaiprc (Uiiiitr: liiimriioxrpalus) , from Herke- 

 ley, ri.iccr County, and I'alo Alto, California. Can. Knt. XXXV. p. -HH. I<)l>.{. 

 Davidson rc))orts it from I'alo .Mto on Dock (Itiimei nccidrniiiliii) . ,Ir. F,c. F.nf.. 

 III. p. .^7'-'. 1!)1<>. 



/'. califoriiicus D.avidson. lirst (.aken on Huiiiiiuiilu.i lalifornuu.^ Henth at 

 I'alo .Mto, California, hy Davids.ui. .Ir. Kc. Knt.. III. p. .S7.S. I!»l(l. Later taken 

 hy the writer on the same |)lant ne.-ir NordliolT, California. Orijiinally d<-scril«-d 

 as P. ranunculi Davidson, hut ren.-inuil /*. raliforiiiiuii hy same author. .Ir. F.c. 

 Knt. IV. p. nt, 1911. 



/'. populimonili.i Riley. ".'\bund;int in Tulare County on Populus frrmonii 

 during; the summer months .at least." Davidson, .Ir. Kc. Knt.. Ill, p. .S7 1. IfMO. 

 .\lso abundant on Populus trichocarpa T. & Ci. at Santa Paida. California, (sec 

 description). .\lso taken by Davidson in Placer County, California. P. C. Jr. 

 Knt. Ill, p. .S<)«. I9II. 



/'. popiilicaulis Fitch. On I'opulus Irirlidrarpa 'V. \- (i. .at Palo .Mto, Cal-, 

 ifornia. Davidson, .Ir. Kd. F'.nt. II, p. 'iW. I.QO}). Also taken in larjie innnhers 

 on the same host at Santa Paula, California (see description). 



/'. popnlltransrrrsus Riley, .\biuidant on I'opulux trichocarpa T. iS: (i. ;it 

 Palo Alto, California. Davidson. .Ir. Kc. Knt. III. p. M^i. 1<>I0. Also taken by 

 same Jiiithority in Placer County. C.iliforni;i. on Populus frrmonii Wats. P. C. .Ir. 

 Knt. III. p. mis. 191 I. 



/'. populiconduplifoVtus Coweii. Occiirriiifj on Populus trichocarpa T. & (i.. 

 in April. Palo Alto. California. Davidson, .Ir. Kc. Knt. Ill, p. .C k l<)l<'. 



/'. frasini-dipctalae F'.ssijj. Quite abund.'int on Mountain .\sh {Frajinut 

 iliprtala) in the mount.ains near .Santa Paula. California. P. C. Pr. Knt. III. pp. 

 i.!-.i.-)(i. Mil 1. 



TRIFIDAPHIS Del. ( .iicrcio. 



'r\])c Pemphigus radicicola Rssip 



7". radicicola (Kssig) Del (iuercio. I'irsl t.aken by the writer at Claremont. 

 C .ilifornia, whore it occurred on the roots of Aniaranthus retroftrxus I.. (Pijiwccd) 

 and Solanum dounlasii Dunl. ( Nightsh.adc). P. C. Jr. Knt. I. pp. 8-10. Iflrtfl. 

 'r.aken also at Oxnard. California, on roots of Nightshade. M Snntn Pnuln, it 

 is frequently found on the roots of Nightshade. Pigweed, and on Potatoes and 

 irnrdeii Meets (always underground). 



