ENTOMOLOGY. 375 



sion of Entomology Oirc. 4^, 2- ser., pp. 4,fio^- ~)- — -^ revised reprint from Division of 

 Entomology Bulletin 4, new series (E. S. R., 9, pp. 62-66). 



Hydrocyanic-acid gas against household insects, L. O. Howard ( f. tS. Dept. 

 Agr., Dwision of Entomology Circ. 46, 2. ser., pp. 4). — The author reviews the recent 

 literature on the various uses to which this remedy has been applied. Hydrocyanic- 

 acid gas has been used successfully in destroying insects in houses, granaries, green- 

 houses, and stores, as well as on living trees and other plants. Attention is called 

 to the great danger from inhaling the fumes of the gas. 



Some mosquitoes of Mississippi, and how to deal with them, G. W. Herrick 

 {Mississippi Sta. Bui. 74, pp- 31, figs. 15). — The author gives a popular account of the 

 relation of mosquitoes to malaria and yellow fever. The most common species in the 

 State is Culex pipiens. Detailed notes are given on the life history and habits of this 

 species. Two species of malarial mosquitoes are reported from Mississippi, viz: 

 Anopheles pundipennis and ^4. macuUpennis. Notes are given on the breeding habits 

 and life history of the tirst-named species. The duration of the immature stages of 

 this mosquito, under normal conditions, in Mississippi was found to be 16 to 18 days, 

 of which the egg stage occupied 2, the larval stage 12, and the pupal stage 2 

 days. The yellow fever mosquito {Stegoinyia fasciata) is commonly known as 

 the "day mosquito" in Mississippi, and is reported as being common through- 

 out the State. A number of other species, are reported, including Culex pungens, 

 C. tarsalis, C. confirm, C. consohrinus, Psorophora ciliata, and Conchyliastes musicus. 

 Notes are given on the various breeding places of mosquitoes and on the number 

 that may be produced from small vessels containing water. As remedies for 

 mosquito plagues the author recommends drainage, stocking water with fish, and 

 the use of kerosene oil. In small open drains with a moderately rapid current it was 

 found that pouring oil on the water was not successful, since the oil did not reach the 

 sides of the ditch. Better results were obtained by spraying oil upon the water, and 

 it was found that 1)y this method many adult mosquitoes, which were resting on the 

 grass ajid weeds were destroyed. It is recommended that an application of oil be 

 made at least twice per month in order to be effective in destroying the mosquitoes. 

 An observation is reported from whic-h it appears that flooding drains can not be 

 depended upon to carry away the mosquito larvse. 



The mosquito plague in the City of Mexico in 1901, A. L. Herreka {Mem. y 

 AVr. Soc. ('lent. ''Antonio Ah((iile," 16 (1901), Xo. 5-6, pp. ;.''07-i'~^<9).— The author gives 

 a general account of the mosquito plague of 1901, with notes on the methods which 

 were adopted for destroying the mosquitoes, and the cost of such work. Special atten- 

 tion was given to locating the breeding places of the mosquitoes and destroying them 

 in such locations by drainage or the application of kerosene. The species chiefly 

 concerned was Culex pungens. It is believed that all of the mosquitoes in the City 

 of Mexico could be destroyed by draining away stagnant water in the vicinity of the 

 city, and using kerosene upon the small pools. 



Some parasites of mosquitoes, A. Laveran {Co)uj>t. Rend. Soc. Biol. Paris, 54 

 {190J), Xo. cV, jtp. 283-235). — The author reports the finding of a number of parasites 

 in mosquitoes, including Tyroglyphuif siro, Chryletus ernditits, and a number of unde- 

 termined species of mites, as well as micro-organisms of a bacterial nature. 



The sting of certain Hemiptera, R. Blanchard {Arch. Parasit., 5 {1902), Xo. 1, 

 pp. l.!9-148) . — Notes are given on the appearance, habits and life history of a num- 

 ber of Hemiptera which may cause more or less serious consequences by puncturing 

 the skin of man and domesticated animals. The species to which most attention is 

 given are Lyctocoris cattipestris, Rednvius j)ers(nmtus, and Conorrhinus sanguisuga. 



Fowl tick, A. A. Brown {Jour. Agr. Victoria, 1 {1902), No. l,pp. SG-90, figs. 7) .— 

 Notes are given on the appearan(;e, habits and life history of Argas americanns. In 

 combating these pests the autlior found that kerosene alone was not an effective 

 remedy but that better results were obtained by the use of kerosene and soap emul- 

 sion. An effective dip was found in a solution of 40 per cent formalin in the propor- 



