18 PAPERS ON CEREAL AND FORAGE INSECTS. 
in Plate I were collected in Kansas and forwarded, in moist paper, 
to Washington, D. C., and photographed by the official photographer, 
Mr. L. S. Williams, and show the injuries more clearly, while Plate 
II, photographed in the field, illustrates the effect on the standing 
corn. Small plants, even those of less than one-half inch in diameter, 
are often recipients of eggs from which the larve, on hatching, bur- 
row into the heart of the plant and cut off the growing bud, thus 
killing the top: they then direct the burrowing downward only to 






Fic. 7.—Corn plant showing result of 
attack by the maize billbug: a, Larval 
vw 
burrow containing pupa in natural Fic. 8.—Swamp grass (Tripsacum 
position: b, egg puncture containing dactyloides), attacked by the 
eggs. a, Reduced two-thirds; b, en- maize billbug. Reduced two- 
larged. (Original.) thirds. (Original.) 
devour the stub, leaving themselves without food, and, being footless 
grubs, they of course perish. Plants of more than one-half inch 
diameter which become infested with larve make very poor growth, 
being very slender, rarely reaching a height of more than 2 or 3 feet 
before tasseling (Pl. IT), and do not produce shoots or ears. Those 
that do not become infested until they are half grown may produce’ 
small ears. Each larva inhabits only the one burrow, and if, owing 
to any mishap, it becomes dislodged from it, it is powerless to rees- 
tablish itself. The larva does not become dislodged from the burrow 
