186 



experiments described indicate that the equine disease in Venezuela 

 is not surra, and confirm the opinion of Mesnil that T. venezuelense 

 constitutes a distinct species, which is morphologically allied to 

 T. evansi, but must not be confused with it. 



\t would be interesting to follow a similar line of investigation 

 with T. hippicum, the cause of " murrina " in Panama. 



Parman (D. C). U.S. Bur. Entom. Observations on the Effect of 

 Storm Phenomena on Insect Activity. — Jl. Econ. Entom., Concord, 

 N. H., xiii, no. 4, August 1920, pp. 339-343. 



Most of these observations were made on Muscids and related 

 Diptera, including Stomoxys calcitrans, Miisca domestica, CochUomyia 

 {Clirysomyia) macellariu and Lyperosia (Haematobia) irritans. With a 

 rapidly falling barometer it was noticed that the flies became nervously 

 active and then passed into a state of coma. During this state they 

 are more subject to the action of destructive agencies. The mechanical 

 action of the wind and sea spray are also probably responsible for the 

 destruction of a large number of flies during a storm. About 15 days 

 after a storm, a marked increase in the number of individuals has been 

 noticed, the interval in question being the approximate duration of 

 the immature stages of the species concerned. It was also noticed^ 

 that insects attracted to lights are more active during high barometric 

 periods and especially while the barometer is rismg. 



Zetek (J.). The Control of Breeding of Yellow Fever Mosquitoes 

 in Ant-Guards, Flower Vases and similar Containers.— J?. Econ. 

 Entom., Concord, N. H., xiii, no. 4, August 1920, pp. 344-350. 



Much of the information on Stegomyia fasciata contained in this 

 paper has been noticed elsewhere [R.A.E., B, viii, 32]. 



DoHANiAN (S. M.). U.S. Bur. Entom. Mosquito Control in a Southern 

 Army Camp.^J/. Econ. Entom., Concord, N. H., xiii, no. 4, August 

 1920, pp. 350-354, 3 plates. 



The area of the work here described mcluded the camp itself and 

 about a three mile zone around it. The camp site was originally a 

 cotton field with deep clay soil and only an occasional bed of sand or 

 gravel protruding above the clay formation. Although almost 

 uniformly level, there were depressions of varying sizes which retained 

 rain-water for some time. The territory to the north, east, and south- 

 east of the camp is devoted to cotton and tnick garden crops, but to the 

 west and south-west the rolling country is covered with mesquite and 

 cacti. 



All temporary pools of water in which mosquitos were found breedmg 

 were oiled with a combination of crude oil 70 per cent, and kerosene 

 oil 30 per cent. To reduce mosquito breeding as much as possible 

 in a creek that was in close proximity to the reservation, 50-gallon 

 oil drums were used as drips. By this means the creek was supplied 

 throughout the period of construction with a steady, uniform and 

 very thin film of oil. 



