INSECTS AFFECTINi; PARK AND WOOULANl) TREES 745 



WILLOW fiALXS 



Twig galls • 



Euura orbitalis Nort., enlarged, lateral, monothalanious but! gall. luit. Soc. Phila. 



Proc. 6: 250 

 Euura nodus Walsh, smooth twig enlargement, one fourth to twice normal diam- 

 eter. Rnt. Soc. I'hila. Proc. 6: 253 

 Euura ovum Walsh, o\'al, monothalamous twig gall, on one siile. l-",nl. Soc. I'hila. 



Proc. 6:251 

 Cecidomyia cornuta Walsh, larva bores stems affected by C b r a s s i c i d e s. 



I',nt. Soc. Phila. Proc. 3:625 

 Cecidomyia coryloides Walsh, large, monothalamous, apical ; resembling :i bunch 



of hazelnuts. Knt. Soc. I'hila. Proc. 3:588 

 Cecidomyia hordeoides Walsh, resembles four rowed barle\-, twig not enlarged as 



in C. t r i t i c o i d c s. Ent. Soc. Phila. Proc. 3 : 599 

 Cecidomyia nodulus Walsh, smaller, though similar to C. b a t a I u s, but mono- 

 thalamous. Ent. Soc. Phila. Proc. 3 : 599 

 Cecidomyia triticoides Walsh, polythalamous, woody, resembling a wheat head, 



U ''4 '"■ I'-'it. Soc. Phila. Proc. 3:598 

 Rhabdophaga batatas Walsh, irregular polythalamous swelling. Ent. -Soc. I'hila. 



Proc. 3 : 601 

 Rhabdophaga rhodoides Walsh, monothalamous roselike galls at tip of twigs. 



Ent. Soc. Phila. Proc. 3 : 586 

 Rhabdophaga siliqua Walsh, monothalamous solitary oval, apical woody gall, 



'.i-l in. Ins. Galls Ind. p. 840 



Leaf galls 

 Pontania borealis Mark., solitar_\-. smooth, reddish, pyriform, }^ in., ^ below. 



Dyar. N. V. Ent.' Soc. Jour. 6:121 

 Pontania consors Mark., gregarious, hairy, spheric, near leaf base, V^ in. Dvar. 



N. V. Ent. Soc. Jour. 6:121 

 Pontania gracilis Mark., green, spheric gall, equally on both surfaces. Dyar. N. Y. 



Ent. Soc. Jour. 5 : 197 

 Pontania terminalis Mark., green swelling on upper surface. Dyar. N. Y. Ent. 



Soc. Jour. 5 : 24 

 Rhabdophaga brassicoides Walsh, bunches of oval, monothalamous, sessile galls, 



'4-2'4 in. Ent. Soc. Phila. Proc. 3 : 577 

 Rhabdophaga gnaphaloides Walsh, apical, solitary, subspherical, '4-'j in. Ent. 



Soc. Phila. Proc. 3 : 583 

 Rhabdophaga strobiiiscus Walsh, pine cone-shaped gall. Ent. Soc. Phila. Proc. 



5 : 582 



Cecidomyia verruca Walsh, small, monothalamous, irregularly spheric gall. Ent. 

 Soc. Phila. Proc. 3 : 606 



Phylloxera salicicola Perg., woolly aphids in bark crevices and leaf buds. Da\ en- 

 port. Acad. Sci. Proc. 9: 267 



Eriophyes salicicola (jarm., longitudinal leaf folds. Pack. p. 595 



Acarus aenigma Walsh, polythalamous, irregular, spheroidal, almost sessile mass of 

 bud or leaf tissues, '^-I'lo i"- Ent. Soc. Phila. Proc. 3:608 



Acarus semen Walsh, small, roughened, greenish yellow, mostly on upper surface. 

 Ent. Soc. Phila. Proc. 3:606 



