Respiration rate decreased threefold to fivefold when dia- 

 paused pupae were compared with reproductive specimens. 

 Moisture content was 63.7 percent for reproductive pupae and 

 44.7 percent for diapaused pupae. No differences observed in 

 lipid content in pupal samples. Glycerol was not found in repro- 

 ductive pupae, but was present in diapausing pupae. 



165. and R. L. Combs. 1971. The horn fly. III. Sex ratio and 



factors affecting adult emergence. Ann. Entomol. Soc. Am. 

 64(4): 912-919. 



A 1:1.35 male to female ratio was found from the total of 

 65,702 flies collected from pastured cattle during 2 years. A 

 higher proportion of male horn flies was found in collections from 

 the legs of calves. Temperature controlled emergence completely, 

 but the effects of temperature were altered by photoperiod. Fe- 

 male flies emerged earlier than male flies in various tests. Photo- 

 period had the most pronounced effect on emergence when the 

 larval and pupal stages were reared at a 12-hour reciprocal 

 photophase of field conditions. 



166. Homan, H. W., and E. P. Duren. 1975. Horn fly control on 



range and pastures. Idaho Univ. Coop. Ext. Serv., Current In- 

 form. Ser. No. 282, 2 pp. 



167. Hori, K. 1960. Comparative anatomy of the internal organs of 



the calyptrate muscoid flies. I. Male internal sexual organs of 

 the adult flies. Sci. Rep. Kanazawa Univ. 7(1) : 34. 

 H. i. exigua was used in the study. 



168. Horne, W. T., E. 0. Essig, and W. B. Herms. 1923. Plant dis- 



ease and pest control. Univ. Calif. Agric. Exp. Stn. Circ. 265, 

 p. 63. 



169. Horning, B. 1959. Fliegen als ubertrager parasitarer wurmer. 



Z. Angew. Zool. 46: 338-342. 

 H, i. exigua was thought to be a vector of habronemiasis. 



170. Hough, G. N. 1899. Some Muscinae of North America. Biol. 



Bull. (Lancaster) 1(1): 19-33. 



Described differences between H. serrata {= H. i. irritans) 

 and H. alcis (= Haernatobosca stimulans) . 



171. 1900. Notes on some European species of Calliphorinae, 



Muscinae Muscaeformes and Muscinae Ariciaeformes in the col- 

 lection of the Hungarian National Museum. Termeszetrajzi 

 Fuzetek. 23: 249-250. 



Discussed synonomy of H. i. irritans. 



172. Hu, Chixg-fu. 1940. Catalogus insectorum sinensium. vol. 5. 



Peiping, pp. 341, 346-347. 



17 



