PSYCHE 
A JOURNAL OF ENTOMOLOGY 
Established in 1874 
VOL. XLVII DECEMBER, 1940 No. 4 
TABLE OF CONTENTS 
An Experimental Study on Caste Determination in Ants. L. G. 
Wesson , Jr 105 
TABLE OF CONTENTS 
An Experimental Study on Caste Determination in Ants. L. G. 
Wesson , Jr 105 
The Histology of the Wing Pads of the Early Instars of Pteronareys 
proteus Newport (Plecoptera). R. P. Holdsworth , Jr 112 
A Synopsis of the Genus Acerataspis ( Hymenoptera, Ichneumon- 
idse). C. D. Michener 121 
The Mating Habits of the Winter Mecopteron, Boreus brumalis 
Fitch. G. C. Crampton 125 
New Chrysopidse from Australia. Nathan Banks 129 
New Species of North American Diplotaxis. M. A. Cazier 136 
Index to Volume 47 149 
