| BELLESIN OF THE, 
USDEPARIMENT OFAGRICULTURE 
ae No. 221 
ee Eatnoleginle Olbawandls Cixek 
J / June 16, 1915. 
: (PROFESSIONAL PAPER.) 
: THE SOUTHERN CORN LEAF-BEETLE.! 
By E. O. G. Key, 
Entomological Assistant, Cereal and Forage Insect Investigations. 
4 CONTENTS. 
i Page. Page. 
re RPIAROM. ot nec - 8 ae = \5 c= 2% ey MOLOpsiGamaceds.. aie Nase Na ae Hae ioe 8 
ss | GG) SESS Se SS See ee 2) SD ISSemina ti OM joes aA ee te eee 9 
0S) Sc a AP OS ee ee Su lbeRiemiedies: & a Fs: ete cece ace hye eee 9 
, Description and life-history notes..........-- Gyo IDakKe REN AUIN DION ls GAS Sea auageaaacd socoososesos 10 
, 
A INTRODUCTION. 
The southern corn leaf-beetle (Myochrous denticollis Say) has 
become a pest of considerable importance during the last few years 
and has commanded the attention of entomologists on several occa- 
sions. Although the habits 7 
f of this beetle are not fully ri 1 
. 
fe 
known, it seems advisable 
to publish the known facts 
and suggest possible rem- 
i eres ees 
; Nis erage S 
g j i 
H ‘ 
— 
i a 
Swe ewane ct 
; ; H { 
r ‘ 
® edies. | 
& The writer’s attention 
| was first called to the de- 
structive habits of these 
beetles in the summer of 
> 1905, while investigating Fig. 1—Map showing distribution of the southern corn 
insects injurious to corn in leaf-beetle (Myochrous denticollis) in the United States. 
southern Illinois. Atthat .°"’"™” 
time numbers of adults were found feeding on grains of roasting ears 
in cornfields in the bottom lands of the Ohio River. Since being 
located by the Bureau of Entomology in southern Kansas the writer 
_ has watched this little beetle and as occasion offered made close 
- investigation of its habits and life history. The occurrence of 
re 
1 Myochrous denticollis Say; order Coleoptera, family Chrysomelide. 
Note.—This bulletin is of especial interest to entomologists in the southern half of the United States. 
| 87709°—Bull. 221—15 
