MEXICAN BEAN BEETLE IN THE SOUTHEAST. 23 
8. It will be noted that the survival of beetles was slightly less than 
15 per cent in each cage. 
The total period of emergence was about two months—from April 
5 to June 6. The maximum emergence occurred between April 19 
and May 6 in the two cages, which is more than a week later than 
the previous year. The majority of the beetles observed through- 
out the winter in nature (Table 6) had left hibernation by April 26, 
and all except one had issued by May 10. 
TaBLe 8.—Hibernation at Birmingham, Ala., winter of 1921-22. 
CAGE 1. 
Beetles collected. Beetles removed. 
Date. Number. Date. Number. 
SO lCiia ZU Aer ae AY oy ae ee DOOMIPACD Ie Sena arama tee ae bees eee 100 
(TEDDIES ten SiR, ren aye Se eee ec a IND fis G0) onl OFehthe aed a ae les aa legal oe rie 85 
SOD laoc eee oes eee ee oaee emma GS OOO ASD Ts 22 oe cae ee eer ee ee 220 
SOU ate tamu sees Shadi s. scent DE ZOO) AAG 2 (omnis ge ee ae ee ee a a ce eee 180 
SES ADS 3 ees SE see Sane ene GOO; | Many: SS2 soe ne Aes ee eee ee ae 300 
SOD bers OMe mene eee eae IE Cae aL, ABT. (S| ME anys es Se he aa aay gE ae ee 753 
WIE AGE Se eae sone heennn a eaten ae Lae 301 
IBY; SRS son Hits rete cote es Sees Igoe 267 
Maya Deen ee gr se metas ee cere gue 102 
WN LenS eS 2s am plea SN oe rei 203 
UITNG 2 ie ore ere eer toe tee eer eee 73 
Dune Gees ae ee a ee ae Sob a eee 16 
Motale. Ab a-ke skotee eet ees 17, 800 otal ene Seen pp ee eee 2, 600 
Percentagesutwival 2a ee 14.61 
CAGE 2. 
OGBs Ns ad os ao SH te a eee ue aaa RATA OID Key O) D6 be meee eh nee Sore SEN IRI oo ate ae 100 
IGE Oey bie Oey rete te ie tres thee |! TE RIAIY INFOS eat Soke sp a RRO DOB e 314 
OG BSE Ae ete 2 ea aes SR eer tae om SROOOS AIA U2 serene repre twain eS coke eee 186 
OG EEDA Gao ek bap hres pea eee Cato ire Me ROD SE2O0: (Aces 17 aaes CeO TT GS 2a dee 1, 036 
(OCs Tiss Oe eee Neen Se ete eres ee ee SLES SSO OB ASP T sel weet re i gah ip Oe yc Sa 1 
OG Tints A 6 © anes GER aie one eins as Ne aaa AS OOOR| Nias Aman acne See sacle ce cate eee 453 
May Sa 733i ssc as tie: on Seb. A TRE 231 
Maye 20s oes e an pceniee 2 en ae nn neon 105 
AT Olas ie Oe ee eas Soe 18, 050 Ut Otaliss. asso cee et Se ee 2, 638 
Percentage sunviveles eeeen esses aaa 14.61 
HIBERNATION AT CHATTANOOGA, TENN. 
The Mexican bean beetle reached Chattanooga, Tenn., early in 1921, 
and reproduced rapidly that year. It had not become abundant, 
however, by fall. In October, 18,000 beetles, collected at Birming- 
ham, Ala., were placed in hibernation on Lookout Mountain in 
Tennessee, in a cage and with materials for protection similar to those 
used at Birmingham, Ala. The altitude of this mountain is more 
than 2,100 feet above sea level, and the latitude is 35° 21’ N. Beetles 
were removed when the locality was visited and the results are given 
in Table 9. The survival in this cage was lower than in the others, 
probably because the beetles were not removed regularly. No 
attempt was made to estimate the mortality due to starvation in the 
spring, but it is believed that a higher percentage of survival would 
have been obtained if the cage had been observed daily. Of the 
adults placed in this cage, 9.7 per cent survived the winter. The 
