CONTENTS.' 



Page. 



The lesser clover-leaf weevil (Phytonomus nigriroslris Fab.)...i<\ M. Webster. . 1 



History of the lesser clover-leaf weevil in America 2 



Trend and methods of dispersion 4 



Investigations carried on in the District of Columbia and vicinity 5 



Seasonal history 10 



Descriptions 11 



Natural enemies 11 



Food plants ' 12 



Bibliography 12 



The slender seed-corn ground-beetle ( Clivina impressifrons Lee . ) W. J. Phillips . . 13 



Distribution 13 



Descriptions and life-history notes 14 



Rearing experiments 19 



Character of injury 20 



Records of depredations 21 



Repellents applied to seed 24 



Weather conditions 27 



Natural enemies 27 



Preventive measures 27 



Bibliography 28 



The clover-root curculio (Sitones hispididus Fab.) V. L. Wildermuth . . 29 



History of the clover-root curculio in foreign countries 30 



History of its occurrence in America 31 



Seasonal history 32 



Descriptions 34 



Feeding habits 36 



Food plants 36 



Natural checks 37 



Bird enemies 37 



Preventives and remedies 38 



Bibliography 38 



The sorghum midge (Contarinia sorghicola Coq.) II'. Harper Dean . . 39 



History of the sorghum midge in America 40 



Distribution 42 



Investigations carried on in Louisiana and Texas during 1908 and 1909 42 



Host plants 44 



Descriptions 45 



Life history and habits 49 



The life cycle 52 



Hibernation 54 



a The eight papers constituting this bulletin were issued in Beparate form on Novem- 

 ber 18 and November 30, 1909; March 7, May 23, June 15, July 12, October 7. and 

 September 21, 1910, respectively. 



Part VIII, as originally issued, was erroneously paged as from tZ9 to l*J. The 

 correct paging, given in this table of contents, is 1SS to 1 .;<>'. 



Part I, revised, was issued on April 3, 1911, and Pari IV, revised, on April IS. L91 1 



VII 



