504 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



head army-worm was very common in the northern half of the state 

 this year. This was part of an outbreak that extended into Minne- 

 sota and eastern South Dakota. The damage was more serious than 

 it has been for years. In some cases oats were also slightly dam- 

 aged, but most of the injury was to the timothy. From a series 

 of observations it was found that early fall pasturing of infested 

 meadows greatly decreased the injury in those meadows the follow- 

 ing year. Apparently the stock eat the grass down so well that the 

 larvse of the second generation in the late summer are practically 

 starved out. 



Peronea minuta Rob. Several nurseries in the state are again 

 having trouble with the lesser apple leaf-folder. The second and 

 third generations of the leaf-folders were exceptionally numerous. 



Grasshoppers became abundant during the summer, especially in 

 meadows and along roadsides. There were two species that were 

 most abundant: Melanoplus femur-ruhrum DeG., and Melanoylus 

 bivittatus Say. 



Scientific Notes 



An Unusual Invasion of Aedes sollicitans in Louisiana during July, 1910. — 



On July 12, 1910, notes were made on a very unusual abundance of Aedes sollicitans 

 in Pointe Coupee Parish, Louisiana. For several weeks before and after that date 

 all field operations were suspended on account of the mosquitoes. Ordinarily 

 negroes pay no attention to mosquitoes. They very seldom have mosquito bars in 

 their cabins. At this time, however, it was impossible for the managers to force 

 the negroes to work in the fields. Live stock suffered very severely. The cattle 

 from the pastures and woods assembled on high places like the levees. Here they 

 galloped back and forth through the night. The mosquitoes were less abundant 

 in the daytime at least when the sun was shining. During cloudy weather in day- 

 time they appear to be as active as at night. Some animals, more susceptible than 

 others, were attacked to such an extent that the hair was all saturated with blood. 

 In company with one of my agents and two other men I went into the cotton 

 field on the afternoon of July 12th with a large number of negroes in order to apply 

 poison. The negroes had to be forced to go to the field. During the short time 

 we were ^.ble to stay in the field all the members of the party attempted to protect 

 themselves from the mosquitoes by moving the arms violently and stamping the 

 feet. The negroes were as active in this as the white members of the party. In 

 spite of what was done it is very doubtful if, for a single instant, there were less than 

 100 mosquitoes on each member of the party. Something over a pound of oil of 

 citronella was used but it had little effect. After about half an hour spent in the 

 field, we were compelled to return to the headquarters. Upon nearing the store 

 one of the men frantically jumped from the wagon and ran to seek shelter. He 

 stated that every puncture gave him extreme pain. In my own case no sharp pains 



were experienced and there were no unusual after-effects. 



W. D. Hunter, 



Bureau of Entomology, U. S. Department of Agriculture. 



