532 BULLETIN 347 
Pathological histology. ...... 2.2... e cece ence cece eee nneec ence neetanees 
Culttital studies). ¢cosca Sis daca de teansis LOO TERMS TREO toeee ces eee eae 
WSDL ee cicatayescotcetro dra iemtoaeesaliauctedd a aNtiepe: bua BNeNee DaRNE SS ee et one 
POtatova Par Slants is. cava:coviie a eycarindaresd ow sencuasdsn Weds deiounjoun due fosimhalal a daunidsd Amiel iden ve 
Relationsof light.aiks swaryc egies ae estate Wa venvinnee Meine dian aaah eeedeiane ties 
Relation of temperature........... ah p i. teeabicgy Beantown ape oneiegeenatiaee S- 
Dannie: acid sia wes savnaiaavan seneacos sealers beeen sibs Sama aamanea tana 3378 
Ecologic relations: si0< sssmoe sree peers Rees PERS OL SLE ee em Eo 
Control ses nine cen s caters Gees omnes aA ish ec alta notin y eke ns eERUS 
Methods that have been advocated.......... 0c cece e eee cece eee eee anes 
General discussion of control measures Si 
EX CHASIOM SINGS SUT ES occ sev ayins Sstseygaitn hs Siion encvaresaoamn ba aouasans Astosues Fi apauanes sea anerae 
THe OUtloOk.. «cies ec nancy es od ota Teutuglen Pat nia selvedll toed Sea danbdal e tese NSPE RSE 
Acknowledginénts o...ncicasieas seseeken getamate ered nw geen Kees a aes 
Bibliography............. iad cable 5d avantyn ec d-suavendy dopa area's Siwiae wala s seamless 
