3] 
but the habit of depositing eggs in cotton branches and the tassel 
stalks of corn suggest the burning of all egg-infested cotton and corn 
stalks, which has been the common practice upon some plantations. 
The field locust eggs are common hosts of two hymenopterous 
parasites, Hupelmus wiphidii Ashm. MS. and Macrotelesa sp. near 
floridana Ashm. In breeding cages the latter appeared during the 
month of June, while the former appeared at intervals from July 21 
until October 15; the majority, however, emerged between August 25 
and September 18, and all were females. — It is interesting to note that 
the parasite delays development and reaches the adult stage at a time 
when locust eggs are fresh and more or less abundant. 
From adult locusts a number of Sarcophagid flies, //elicobia helicis 
Town. were bred. The maggots appeared on September 15, pupated 
September 17, and matured September 24. 
THE RELATION OF CREVASSES AND RAINFALL TO THE APPEARANCE AND 
DISAPPEARANCE OF GRASSHOPPERS. 
Planters operating behind the levees of the Mississippi River have, 
from experience, begun to expect insect outbreaks of one kind or 
another after overflows. In many sections the Southern grass or army 
worm (Laphygma frugiperda) makes its appearance in damaging num- 
pers, while in other places grasshoppers and the army worm may 
both become destructive. It has been frequently observed that pre- 
vious to crevasses predaceous beetles of many kinds are abundant on 
alluvial lands. They feed upon the army worm and easily keep them 
in check. During crevasses the beetles are either destroyed or are 
carried to other places by the flow and rush of the crevasse water. 
As soon as the water recedes and the land is put in cultivation the 
army-worm moths from neighboring sections fly in, and as this species 
is a rapid breeder, the crops of the overflowed area are soon infested 
with armies of caterpillars. It is usually a month or more before the 
predaceous beetles can migrate in numbers sufficient to check and 
overcome the march of the caterpillars. 
In the case of the grasshopper the conditions are somewhat differ- 
ent. A part of the overflowed land may be thrown out of cultivation 
a season or more, and thus nesting places are provided. Should heavy 
rains prevail during May and June of the season immediately follow- 
ing the crevasse, nothing is heard of the ravages of grasshoppers; but 
should dry summers follow, the conditions for grasshopper propaga- 
tion and development are much more favorable, and complaints are 
usually common. The relation of predaceous beetles to grasshoppers 
is not so intimate as in the case of the beetles and the army worms, 
though it must not be wholly disregarded, nor are the rains so destruc- 
tive to the army worms as to grasshoppers. 
