Pomona ColleiiK Joi'hnal of Entomolooy 



461 



Pivus pinasier Ait. (Cluster Pine). 

 Pincus pinicorticis (Fitch) Sliini.- 

 D,ivid.son, Jr. Ec. Ent. II, ■idd, 

 1909. 

 Pinus radiaia Gord. (Moiiti-rc_v Pine). 

 Essigclla calif ornica (Essig) Del. 

 Guer.-Essig, Po. Jr. Ent. I, 4, 

 1909. 

 LacIiniLS pini-radiatae Davidson, Jr. 



Ec. Ent. II, 299, 1909. 

 Mindarus abietinus Koeii. -Clarke, 

 Can. Ent. XXXV, 218, 1903. 

 Pinus sabiniana Dougl. (Digger or Sil- 

 ver Pine). 

 Lachnus pini-radiat* Davidson, Po. 

 Jr. Ent. Ill, 398, 19II. 

 Pisum sativiun L. (Pea). 



Macrosiphum ulmariae (Schrk.) 

 Sellout. -Essig, Po. Jr. Ent. II, 

 338, 1910. 

 Plane Tree see Platanas. 

 Platauus orientalis L. (Oriental Plane 

 Tree). 

 Drepanosiphuni platanoides Schrk. - 

 Davidson, Jr. Ec. Ent. Ill, 377, 

 1910. 

 Plum see Prunus domestica L. 

 Plum, Green Gage see Prunus do- 

 mestica var. cereola L. 

 Poison Hemlock see Conium. 

 Poplar see Populus. 

 Populus sp. (Poplar or Cottonwood). 

 Melanoxantherum rufulus (David- 

 son) Schr.-Davidson, Jr. Ec. Ent. 

 Ill, 376, 1910. 

 Melanoxantherum saliceti (Harris) 

 Schr.-Davidson, Jr. Ec. Ent. Ill, 

 375, 1910. 

 Pemphigus populicaulis Fitch-Dav- 

 idson, Jr. Ec. Ent. II, 299, 1909- 

 Pemphigus populitransversus Riley- 

 Davidson, Jr. Ec. Ent. Ill, 372, 

 1910. 

 Populus fremontii Wats. 



Ciiaitophorus populifoliae Fitch- 

 Davidson, Jr. Ec. Ent. Ill, 375, 

 1910. 

 Pemphigus populimonilis Riley- 

 Davidson, Jr. Ec. Ent. Ill, 37"l, 

 1910. 

 Populus trichocarpa T. & G. (Cotton- 

 wood). 

 Thomasia populicola (Thos.) Wil- 

 son-Essig, P. C. Jr. Ent. I, 99, 

 1909. 



Pemphigus populicaulis Fitch-Dav- 

 idson, Jr. Ec. Ent. II, 299, 1909. 

 Pempliigus populiconduplifolius Cow- 

 en-Davidson, Jr. Ec. Ent. Ill, 

 371., 1910. 

 Polygonum sp. 



Rhopalosiphum nympheae (L) Koch- 

 Davidson, Jr. Ec. Ent. Ill, 377, 

 1910. 

 Prunus armeniaca L. (Apricot). 



Hyalopterus arundinis Fabr.-Clarke, 

 Can. Ent. XXXV, 219, 1903. 

 Prunus domestica L. (Plum). 



Apliis persica?-niger Smith-Clarke, 



Can. Ent. XXXV, 252, 1903. 

 Hyalopterus arundinis Fabr. -Fowler, 

 Rep. Cal. Exp. Sta. Pt. I, p. 78, 

 1899-1900. 

 Myzus persicae Sulz. -Davidson, Jr. 



"Ec. Ent. II, 303, 1909. 

 Pliorodon humuli Schrank-Davidson, 

 Jr. Ec. Ent. Ill, 380, 191O. 

 Prunus domestica imr. cereola L. (Green 

 Gage Plum). 

 *Aphis alamedensis Clarke, Can. Ent. 

 XXXV, 251, 1903. 

 Myzus cerasi (Fabr.) Buck.-Clarke, 

 Can. Ent. XXXV, 252, 1903. 

 Prunus persica B. & H. (Peach). 



Aphis persicae-niger Smith-Clarke, 



Can. Ent. XXXV, 252, 1903. 

 Myzus persieae Sulz. -Davidson, Jr. 

 Ec. Ent. Ill, 379, 1910. 

 Pseudotsuga douglasii Carr. (False 

 Spruce). 

 fGillettea coweni (Gill.) Borner- 

 Davidson, Jr. Ec. Ent. Ill, 372, 

 1910. 

 Pyrus communis L. (Pear). 



Apliis pomi {}) De Geer-Davidson, 

 Jr. Ec. Ent. II, 302, I909. 

 Pyrus mali L. (Apple). 



Apliis pomi De Geer-Fowler, Rep. 

 Cal. Exp. Sta. Prt. I, p. 78, 1899- 

 1900. 

 Aphis sorbi Kalt.-Clarke, Can. Ent. 



XXXV, 252, 1903. 

 Schizoneura lanigera Haus. -Fowler, 

 Rep. Cal. Exp. Sta., Pt. I, 82, 

 1899-1900. 

 Quercus sp. (Oak). 



Schizoneura querci Fitch-Clarke, 

 Can. Ent. XXXV, 248, 1903. 



•In description spelled Aphis alemedensis 

 Clarke. 



tChermes cooleyi var. coweni Gillette 



