EL Kodatum 1954 Critical maximum temps. B. canorus and B. boreae holocephalus Oct. 41 Expt. # 1 B. canorus ad. ?? ELK #369, L=49 jar A (Tioga Bass) B. boreae ad. " " #228 L=67 mm. " B. (Yes. Valley) water bath A B 9:44 a.m. 14.0°C. 14.8 14.3 :52 15.1 14.9 14.8 -boreae exploring, in vertical jar, w head top of jar. canorus inactive. :56 17.2 15.9 16.0 10:02 20.3 17.2 16.9 -canorus rotated 90° but not active. boreae exploring. :07 22.8 21.0 21.6 -> agitator propeller lowered in water bath. :12 25.8 21.6 24.3 -canorus raised on side of jar. :18 28.0 24.0 27.8 -boreae increased exploration :20 29.2 26.7 28.6 -canorus now actively exploring ? boreae dropped head for 2 min., then continued exploration. :23 30.4 28.6 29.4 :25 31.2 29.0 30.6 -both active & movements coordinated :29 32.8 30.0 32.0 -both spasmodic explorer, boreae still more active. Clustering boreae skin. :33 :36 -boreae covered when I moved hand over its jar. 10:33 34.8 33.1 34.5 :36 35.9 34.2 35.6 -boreae in distress? now lying float in bottom of jar but in round crouched position. :40 37.4 36.7 (37.2) -both larvae showing rotational movements but heads off toward. - boreae flattened in crouching position, big eyes seen partially closed. :44 38.8 (37.9) (38.6) -boreae has remained crouched +1 minute :47 I removed B. boreae jar (B) and rotated it. boreae rights itself but slowly, returned jar B to bath.