29 



process of development, the last one occurring from June 25 to July 1. 

 The mating season begins in from fifteen to twenty days after maturity, 

 and in as many more the oviposition season begins. 



From the local distribution of this locust, as well as its large size, 

 conspicuous coloring, and lubberly movements, no trouble is experi- 

 enced in destroying it. The bran arsenic mash had been used upon 

 this locust with good effect. Locating the eggs and exposing them by 

 winter tillage is the most practical remedy. In very local outbreaks 

 the net has been used to collect both nymphs and adults. A species 

 of Sarcophagidae has been found a common parasite of this grasshopper. 



Dissosteira Carolina. — The Carolina locust eggs resemble very much 

 in size and form those of the Schistocerca obscura after the coloring 

 from the latter has been removed by alcohol. (This coloring of the 

 eggs of obscura resembles in its reactions the color extract from the 

 petals of red roses.) The eggs are laid in the same areas as differ- 

 entialis and obscura. The preferred food of the young we were unable 

 to determine, and hence were unsuccessful in the effort 

 to determine the life history of this locust. Grasshop- 

 pers of all species are difficult to rear in cages, and this 

 one we found no exception. The young would con- 

 gregate upon the window side of the cage, and would 

 there remain until starved to death. Cockle-burs, which ' 

 were readily eaten by other species, were only occasion- 

 ally nibbled. This locust did not appear in destructive 

 numbers and is given consideration only because the 

 eggs and young are frequently confounded with those 

 of the differential. From field observations the period 

 of development of the Carolina locust is about equal to 

 that of the differential, though mating and egg-laying 



is later ' # # _ Fig. 17.-Egg sac of 



Chortojjhaga viridifasciata. — This species is widely Dictyophorusrectic- 

 distributed through the South, and though it appears in 

 the Mississippi Delta in unusual numbers for this species, the damage 

 done was not appreciable. It is here considered for two reasons: First, 

 the young appear early in the spring and have been frequently mis- 

 taken by planters for the differential. The young of the first brood 

 appears as early as the middle and last of March. It is double brooded, 

 and receives a second consideration because the eggs act as food for 

 differential egg parasites which appear earlier than August 15 and 

 September 1. The first brood matures about May 15 and the last from 

 October 1 to 18. As hibernation is passed in the egg condition, fall 

 and early winter cultivation will prove destructive to the eggs. 



Melanoplus atlanis and Ohloealtis viridis were also found upon Da- 

 homy, but not in sufficient numbers to warrant any alarm. Specimens 

 of atlanis wore received from the alfalfa sections of the Red River 



