

CONTENTS. 



Department Bulletin No. 251. — The Calosoma Beetle (Calosoma Syco- 

 phant a)~ in Ne w England: Page. 



Introduction j 1 



Method of packing beetles for shipment 2 



Native home of Calosoma sycophanta and hosts attacked 3 



Investigational work on Calosoma sycophanta 3 



Equipment used for rearing predaceous beetles 4 



Methods of rearing calosoma beetle. . ,. . .' 6 



Life history of Calosoma sycophanta . ■ , ...... . 7 



Natural enemies 18 



Colonization of Calosoma sycophanta . . ' 19 



Methods of securing data from field colonies 20 



Dispersion of Calosoma sycophanta • , 21 



Economic importance of Calosoma sycophanta 39 



Department Bulletin No. 252.— Life History op the Codling Moth in 

 Maine: 



Introduction 1 



Definition of terms 2 



Seasonal history studies of 1913 3 



Seasonal history studies of 1914 28 



Comparison of the life history of the codling moth in 1913 and 1914 46 



The control of the codling moth in Maine 49 



Summary and conclusions j 49 



Department Bulletin No. 253. — The Effect of Different Times of 

 Plowing Small-grain Stubble in Eastern Colorado: 



Introduction 1 



Precipitation ------ 2 



Experimental work 4 



Soil moisture 6 



Summary 13 



Conclusions 14 



Department Bulletin No. 254. — The Sharp-headed Grain Leafhopper: 



Introduction 1 



Economic importance and mode of injury 2 



Distribution 3 



Food plants 3 



Description 3 



Life history and habits 6 



Enemies 14 



Remedial measures 15 



Department Bulletin No. 255.— Douolah Fir Pitch Moth: 



ire and cau.^e of damage 1 



I*. tributioD and extent of damage 1 



Manufacturers bear the loss 2 



8cO£e of fix; investigation 2 



Lift; U-iory 3 



Seasonal history 4 



Habitat.. 6 



Location of affected ureas 7 



R tnfee of the insed • 7 



Ho I I '"■•■■ iahd character of injury 7 



I . tdenCe that it i insed work 10 



Wind hake and lightning dot the can le of pitch searns 12 



Character of larval work 15 



