Duration of the egg stage varied from an average of 30 hr at 

 20° C to 11.2 days at 33.5° C. Eggs held below 90 percent RH 

 did not hatch. As the temperature increased, the lower limit of 

 humidity at which hatching occurred was reduced. 



123. 1972b. Field and laboratory studies on the life cycle of 



the blood-sucking ectoparasitic fly Siphona irritans, Lin. in 

 Egypt. 3. The larval and pupal stages and their micro habitats 

 in nature. J. Egypt. Vet. Med. Assoc. 32(1/2) : 55-74. 



Duration of the three larval instars varied from 13 days at 18° 

 C to 3.8 days at 32° C; duration of the pupal stage varied from 

 13.5 days at 18° C to 3.9 days at 31° C. Pupal period was 

 shorter at 98 percent RH than at 90, 95, or 100 percent RH at 

 25° C. Field studies included observations on temperature, RH, 

 and pH of cow pats. In Egypt optimum developmental tem- 

 peratures occurred in the spring. 



124. 1972c. Studies on the behavior of the blood-sucking fly 



Siphona irritans, Lin. toward some environmental factors, to 

 pave the way for proper control. (Diptera: Muscidae) A. The 

 adult stage. (3) Smell reaction and olfactory receptors. J. 

 Egypt. Vet. Med. Assoc. 32 (3/4) : 229-246. 



Reactions of H. i. irritans to the smell of animals and dung 

 were studied. Various combinations of smell, temperature, and 

 humidity were tested. The degree of moistening of the host's 

 body was found to determine the degree of abundance of flies on 

 the host. 



125. Gjtjllin, C. M., and V. D. Bevill. ±y/2. Insect chilling table. 



J. Med. Entomol. 9(3): 266. 



126. Glaser, R. W. 1923. The effect of food on longevity and repro- 



duction in flies. J. Exp. Zool. 38(3): 383-412. 



H. i. irritans could be kept in captivity for 2 to 25 days but 

 ceased egg laying 2 to 5 days after capture. 



127. Gmelin, J. F. 1790. Caroli a Linne', systema naturae per Regna 



Tria Naturae, (ed. 13). vol. 1: Regnum Animale, pt. 5. Lipsiae 

 (^Leipzig), p. 2892. 



128. Goble, H. W. 1948. Insects attacking man and domestic ani- 



mals. Can. Insect Pest Rev. 26: 56, 80, 85. 



129. 1950. Insects affecting man and domestic animals. Can. 



Insect Pest Rev. 28: 56,92. 



130. Gonzalez, R. H. 1968. Haematobia irritans (L.) en Chile. Rev. 



Chil. Entomol. 6: 142. 



Collected H, i. irritans, not previously known in Chile. 



131. Goxzalez-Rincoxes, R., and L. Guyon. 1953. Classification 



general de los Dipteros. Caracas, pp. 118-125. 



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