and soft or spongy when they do not kill them outright. Some other 
sucking insects — plant-lice, plant-bugs, leaf-hoppers, and the like — 
occasionally injure the plants by absorbing their vital juices, but with 
some notable exceptions they are comparatively unimportant as beet 
pests. 
Many of the most destructive or best known sugar-beet pests have 
received more extended notice in recent publications of the Division of 
Entomology, notably in Bulletins 19, 23, 29, 33, and 40, new series (from 
which the present article has been largely collated), in addition to other 
publications which have been cited in the introductory paragraph and 
others which will be mentioned in connection with the different species 
as they are considered. 
In indicating- methods of control to be observed for insects which 
are not special enemies of the sugar beet, it has been found necessary, 
owing to our somewhat imperfect acquaintance with all of the condi- 
tions which surround attack, to treat the subject in a general manner. 
The remedies for different forms and classes of insects are therefore 
considered as they occur upon the farm. Where deemed advisable, 
however, an effort has been made to limit remedial directions to the 
occurrence of many of these insects in fields of sugar beet. It may 
therefore be stated that as a general rule remedies prescribed for 
insects as these occur on their favorite food plants also serve for their 
destruction on other crops. Exception is made of insects such as 
the southern corn root-worm, which is a prime enemy of corn, though 
the beetles are usually to be found in beet fields, since the elaborate 
treatment which is often necessary in combating this pest on corn, 
need not be employed on beets and other crops where its injuries are 
comparatively insignificant. 
LEAF-BEETLES AND FLEA-BEETLES. 
Several leaf-feeding beetles of the family Chrysomelidse, known 
as leaf-beetles and iiea-beetles, are quite conspicuous as enemies of 
the sugar beet. Three of the leaf -beetles are apparently peculiar to 
beets among cultivated plants, injuring them both in the adult and the 
larval stage, while numerous flea-beetles, although as a rule general 
'feeders, are even more destructive by attacking the plants early in the 
season, when they are least able to withstand injury. 
THE LARGER SUGAR-BEET LEAF-BEETIiE. 
{Monoxia puncHcolUs Say. ) 
With the cultivation of the sugar beet in the West there has come 
to prey upon it a moderate-sized leaf -beetle, known in parts of New 
Mexico as the " French bug. " ^ Its presence in beet fields was first 
«^ee the author's article, Bui. 18, Div. Ent., U. S. Dept. Agr., p. 95. 
