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THE ROUGH-HEADED CORN STALK-BEETLE ° 
By W. J. PHinuires, Entomologist, and Henry Fox,’ Entomological Assistant, 
Cereal and Forage Insect Investigations, Bureau of Entomology 
° CONTENTS 
; Page Page 
RRETOOUCEIONN S02 Se Sas eee eae 1 | Species likely to be mistaken for 
Heonomic. history i= a 2 Huetheola rugiceps—Continued. 
BIStrIDUblOIN eer es eS ey 3 Phytiophaga spp === 29 
Bifewhigtonry) 2c se reee eke tL 4 Natural) enemies: ctor ee 29 
General account “225077 => >= 4, |) Contrel measures? 25 eee 31 
(Di (RBA CE GS TP oe Bet: Ble Bee eee 5 Elimination of waste lands and 
1s 7 ee ay a es Te eae 9 Old» pastures\Ac4 = 8 eat tev wen 31 
Prepupa —2_ ji cn SS Se A 16 Pasturing with hogs__________ 31 
Pa par foie gery unit i eh 17 Barly plantings: ti ute it 39 
ube a oe ee ee 18 Change of rotation_~__________ 32 
Species likely to be mistaken for - Wer TINZeLS: 2k = See wa ee a 82 
Huetheota rugiceps —__~-____.4.-_-- 26 lam deipickinigs = eps ee oe 32 
Ligyrus gibbosus (De Geer) ____~ 26 Late summer plowing _________ 82 
Dyscinetus trachypygus (Burm. ) — 28 Summary of control measures__ 32 
Cyclocephala spp ._-__---__---_- 29" \biterature: cited 22262 ses She ve 2a 33 
INTRODUCTION 
The ravages of (Ligyrus) Huetheola rugiceps (Lec.) were first 
brought to the attention of the writers in 1914 (9, p. 3).2 Dr. J. M. 
Gouldin, of Tappahannock, Essex County, Va., in a letter dated 
June 26, 1914, stated that some farmers lost nearly their entire corn 
crop. The late Prof. F. M. Webster, then in charge of Cereal and 
Forage Insect Investigations, instructed the senior writer to make 
a personal survey of the situation. This was done early in July, 
1914, and showed that serious damage (Pl 1, A) had occurred on 
several hundred acres of corn in the vicinity of Tappahannock, Va. 
At that time the beetles had practically ceased their activities, but 
specimens were sent to Charlottesville, Va., for life-history. studies. 
Since little was known of the habits of this pest or the means of 
control, the problem of determining these points was assigned to 
the Charlottesville laboratory, with the senior writer in charge. 
The breeding records obtained from material secured in 1914 were 
disappointing, and since the locality of the outbreak was rather 
1 Huetheola rugiceps (Lec.) ; order Coleoptera, family Scarabaeidae. 
2 Resigned August 31, 1918. 
5 Reference is made by number (italic) to ‘ Literature cited,” p. 33, 
94051°—24 1 
