TRANSACTIONS OF THE SAN DIEGO SOCIETY OF NATURAL HISTORY Volume IX, No. 31, pp. 337-352 OBSERVATIONS ON PLANTS AND INSECTS IN NORTHWESTERN BAJA CALIFORNIA, MEXICO, WITH DESCRIPTIONS OF NEW BEES BY T. D. A. COCKERELL University of Colorado OCT 6 1941 SAN DIEGO, CALIFORNIA Printed for the Society September 26, 1941
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