319 
Black Jack Oak (Q. nigra), White Oak (Q. alba), (Q. macrocarpa, Q. 
prinus, and Q. castanea. I have not aa Seb antiinity. to examine any 
considerable number of the acorns of the four last-named species, but 
such as I have seen show the work of the same insects as infest the 
others, of which I have had an almost unlimited quantity. 
The following tables will be found approximately representative of 
the proportion of acorns destroyed by the different insects feeding 
upon them: 
Perera (OSG COLL )t ACOINS = 2ic<02c< 2 es sec/e oheeet Salve sida o Saco oe connote eect 100 
Infested with Balaninus quercus and uniformis.........----..------------ 60 
Meliseopusilatiferveane siti atoee es oe == ae lee eee eee 28. 
SHITE! TLS Se eee Os See Der Set eens ae te oie pee eee Pee eee aye tcl 8 
HOLE M KEM OMT Ce Wed) MUGS enn. tr cess soles, see oe. oF Se ote oad oa canoe 4 
Infested by Gelechia following Balanimus ....-.......-----....---.-e0--- 25 
MOLISSOPUS-eecite eee =v cccre sees Seer 5 
Ee eee acd (OmatCLorad) ACOINS= «=. sacs5200 Sec asc ca Stee oo taseteeees ceecae ues se 100 
Pitestedawithsbalaninis): jo 252%Jsoss nee e soca h eee t Sets th 4 Be wee ele 70 
IMG@Las Opus seas 6)5 sO Sa ete anes Hs Aa esas ie 20 
Oymipidy pals se A asa ioe oe pias Set sayesinin See's Sanne ee cco ciee 5 
PS CUTEEICN R EEEM GS cesta rats Sin Sato ahaloi sash Fai iste Sic oars el mietages Sais aieiciwie wie Sapreteiee 5 
Infested by Gelechia following Balaninus .................---- Poaceae 30: 
IMGIISSOPUGhes ee. pastes tea ects 6. 
AEC LC) mia: CO) te NUMICHIN | ACOINS: =). cc2.cc1s soo sa sacise. 2 Seeigee -ciniee el does se ewes 100 
DBP TOUS Eyal ATETISE 2085 sce ets, sane gene! cet as cisiecio Oe aia see mas ES 63. 
CSTE ET Te Det SEO Re, Oe Se De 24. 
SCMEGL TTI GSS EROS SR ee ee eee ee ee ee eee 13. 
Infested by Gelechia following Balaninus --..--..--..-.-.....-.-.--.---- 14 
MGNESOPUSS 5 eee ac aacete ss Se cote cee. 9 
Pern En IG OUST AS VACOETISN oe.ccicae = os S-kek He cose ete ees wamaehes oa toaseee ss 100 
imtesteds bys balaninmsy: sess Sh ae i a tats SSS Uea soo ste Soe een 25 
IMeltssopusc Sse ar es Sotho bs Se das Sates wins be Siete eee 10: 
SOREL ETUUE LS yee ect Se See ee eR LE ates Seles a ciaiaie Scarab 3 eeiciont a2 ee 65. 
Have not found Gelechia in nuts of this species. 
Black Jack Oak (Q. nigra) acorns............-.--.- SS tias ote is ore ears See 100 
Psties DEC Dy Es wlaMINUSs® 8. cones laste. ane Sets stare toe oe Saabemee eee 35. 
MGIB OPUSHEET ee one te te owe cas ec oc ee a te yer oS ae ans 50: 
SEOG! Ca ES Eo EAA i ete SO Re ae ek eee he Ae 15 
PPCHIMB MO WIN, DOIANINGS ..55)52 40; <2 ope) gover eat ls om cb oa Soe louis Shek 15 
MGIISSO PUB cee. * ac eciereea saa Oe eae ee ae woes 20 
From these revords it will be seen that the acorns of Pin Oak suffer 
least from the attacks of insects, that the Black Jack is most sub- 
ject to the Acorn Codling, and that the Black Oak (Q. tinctoria) acorns 
are the only ones of which any appreciable percentage are, in this local- 
ity, infested with the Cynipid galls. 
In the preparation of these memoranda the life histories of most of 
the species have been more or less completely worked out, and such 
biological facts and descriptions as have not heretofore been published 
may be perhaps not inappropriately recorded in this connection. 
The acorn-feeding species of Balaninus (B. uniformis Lec. and B. 
quercus Horn) may be taken here, out of doors, as early as the first of 
