22 
As is quite to be expected, the rating arrived at from the summing 
up of the qualities mentioned differs very considerably from the rating 
which might be arrived at from the quality of immunity from insects. 
Taking the large and medium-sized trees only (36 species in all), Mr. 
Fernow’s rating stands as follows, only the total gained by the addition 
of the ratings in the several qualities considered being given: 



Total Insect 
Variety of tree. rating rating 
(Fernow). | (Howard). 
LARGE-SIZED TREES. 
Red oak (Quercus rubra) ..---------- < 2-222 conn ee ene eee ne cece een nen n ene 22 2.5 
Scarlet oak: (Ouereee coccyied) ammo eee enrol apolar oe eee 22 2.5 
Vellow, caks(Quercws velityn td) on acainco= stele wa cle ale = Sele telat tel taal eal 22 2.5 
American é¢lm (Ulmus americana), 5.22 2253-5 ses emcee ntem enema een el eae ae 22 1.5 
Suparmaple (Alcenisaecharuin) -a sacar 2a nee ates alt ee eee 19 P25 
Blaokymaple (Acer 197M) epee seh oa aa ee eee see oe eee oe eee eee 19 U5 
Tulip tree (Liriodendron OU OTE RIN EES ose ase an cdot Sane Sscsstaeaeed tases 19 | 3.0 
European linden (Telia vulgaris)... -- = =.= 2-2 = a= = = nn wn en ee wee ens 19 ars 
Small-leated linden (7tliaanicrophiyjllay). oes. = sajsnaee ea eee ee ee eral 19 2.0 
Sweet gam (Iiquidambar styraciflud) -. 222-2 oon a a enn one ween nemesis 19 | 2.0 
W hiteiosks (QiserCts loa) aoe te = a ete ainlnimrate= im ie teas alee ee te ale eee 19 2.0 
Bur oak (Quercus macrocarpa) ---- 2 - --. 22sec = one oo een een ne enn = oon 19 | 2.0 
Oriental plane tree (Platanus orienialis).....--------------- --seeneneeecnennee| 19 | 1.5 
Kentucky coffee tree (Gymnocladus divisus) . ---.- te than BREE PSE SN RS eS 19 | 20 
American plane tree (Platanus occidentalis) ......--.-.-----.------s0en--2---- 18 | 1.5 
Sycamore maple (Acer pseudo-platanu8) .-...-----.-----------------------00-- 17 | 2.0 
American linden (ita, amnerleand)i-.-s 2c nc oe aienine sep eeenteee eee eee eae 17 1.5 
MEDIUM-SIZED TREES. 
Liver eney at CAE end) in nope BAB oS Sas sOCIDoe Cp ocH OAM ASE Camoosnaeeeesednoc 22 2.0 
Shingle oak (Quercus imbricaria) ....----.--- 2-22-0002 2-22 ence we een asco ne 21 2.0 
Wallowieak: (Quercicsitellos) ae male wien alm mie aa tata ae lel eee ila oti eee 21 2.5 
Slippery, ela (Wie puUvescenys) maaan oan ioe eee staan ae oa ee eae 21 2.0 
Norway maple (Acer platanoides) <5 2 on een meen no ennine oee soe ean 20 2.0 
Box elder (Negundo negundo¥. SBS HC RDO AE oa} Apap dae see oc PDR Cae SOscga500 20 .0 
European elm. ((Vlmus campestris).: 2 occas cae cena = soe eeiaeemen seat 19 .5 
Scotch elm (Utnius montana) 225-25 22s seccess eteet ners ce epee eee ae ee ee mate er 19 1.0 
Hackberry (Celtis occidentalis). ...... 2.22. 2.0-0-eeeeececenccencsseceneennences 19 1.5 
Silver-leafed maple (Acer sacchaminium) 22-22 <2 coc ae oe c= nee ssa sicne tea eee 17 1.5 
Tree of heaven (Avlanthus- glandulosa) -2- <2 662s wen e ne ween nee nice ean en eseeces 16 | 2.5 
Horse chestnut (A’sculus hippocastanum) .--.--.---.-----0+-----------c-n eee 16 | 2.0 
Japanese sophora (Sophora japonica) ----.- BS OES IS aE an Ono an tne aes 16 | 2.5 
Hardy catalpy, (Catal paispecvosd,) aan <== sas stance male ata eta tele ea eee 16 2.0 
Gingko\(Gingko biloba) 22-222. 5-252 ses ec ec ete: cee cee eee eee cece eae eeee 16 | 3.0 
Honey locust (Gleditschia triacanthos) |. 2 a < Fc = ole saan ne ele ee eee eal 15 | 1.0 
Cottonwood! (Populusinonilivera) —-2- -sea- cee see eee en ee aa eee 15 | .5 
Balm of Gilead (Populus balsamifera v. candicans) ..----..--.-----+---------- 15 .5 
Black locust (Robinia pseulacactd) aoe asae ae ee eee eee eee eee eee eee 14 | .o 




The writer has made ratings of these same trees according to their 
immunity from the attacks of insects, the trees most immune being 
rated at 3 and those most attacked by insects at 0. The figures relat- 
ing to insect attack are displayed above in a contrasted column next to 
the total rating, and in order that the relative importance from the 
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