CONTENTS. 
Page. 
The timothy stem-borer, a new timothy inseet (Mordellistena ustulata Lee.) 
TT". /. Phillips.. 1 
Introduction 1 
History 1 
Distribution 2 
Character of attack 2 
Host plants 2 
Description of the different stages 3 
Life history and habits 6 
The egg 6 
The larva 6 
The pupa 7 
The adult 8 
Life cycle 8 
Hibernation 8 
Parasitic enemies 9 
Remedial measures 9 
The maize billbug (Sphenophorus maidis Chun. I E. 0. G. Kelly . . 11 
Introduction 11 
History of the species 12 
Injuries since 1895 14 
Distribution 15 
Food plants 15 
Description and life history 16 
Number of generations 22 
Records of depredations 22 
Remedial measures 22 
Chinch-bug investigations west of the Mississippi River. 
E.O.G. Kelly and T. H. Parks.. 23 
Introduction 23 
Distribution 23 
Description and number of generations 24 
Migrations 24 
Status of the chinch-bug problem in Kansas, Missouri, and Oklahoma .... 26 
Southern Kansas and northern Oklahoma, 1910 29 
Kansas, 1911 30 
Hibernation 32 
Preventive measures recommended 36 
Remedial measures 38 
L'nsatisfactory remedial measures 39 
Plowing under infested crops 39 
Parasitic fungi 40 
Early observations 40 
Observations by the writers 41 
Summary 50 
1 The seven papers constituting this bulletin were issued in separate form on March 31, April 22. and 
December 14, 1911, and April 10, April 22, May 31, and October 16, 1912, respectively. 
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