Gr Nat Hist: Surv. 
Tllinois Natural History Survey if LIBRARY OF THE 
Section of Faunistic Surveys & Insect Identification AVR 1955 
Urbana, Illinois UNIVERSITY OF ILLINOIS 
December 29, 195) . Identification Notes 1 

a 
Corn flea beetles and their allies 
Milton W. Sanderson 
In the Mississippi Valley about fifteen species of flea beetles 
have been found associated with corn or have been taken commonly on 
vegetation in corn fields or along field margins. Only three or four 
of these species are believed to be of importance on corn, the others 
feeding occasionally if at all on this plant. Several of these species 
are superficially similar. The following key is designed to distinguish 
between species of little concern and those of economic importance. 
Key to Genera or Species 
1. Dorsum with short erect hairs; body usually black but some 
species reddish or pale. ..... yt eee +s fe 6) eer 
Dorsum without hairs... oe Tee awe ote OPE. Shee S16 6) me eed ee 
2e Each elytron having a longitudinal HeIAOWESh SUPIPS 2. wo ietren tne 3 
Davee Nit Only darn. Die Pale 4 ste 6. « 40 6c 6 Gla es &). bf 
3. Elytral stripe nearly even in width throughout most of its length 
eA tet he ) whe ee 6d en ae es a + 9) ob eB ebena blends 
Elytral stripe irregular in width (fige 2)... Phyllotreta 
