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laboratory (Table 3-1). Johnson and Hertig (1961) reported greater 

 fertility in wild-caught than laboratory-reared Lu. sanguinaria 

 (Fairchild and Hertig) and Lu . gomezi . Perkins (1982) reported that 

 68% of the egg batches of laboratory-bred Lu_. shannoni (Dyar) females 

 were fertile, indicating at least that degree of mating success. He 

 also found that 100% of wild-caught females dissected had sperm in 

 their spermathecae, representing 100% mating success. Endris (1982) 

 reported that up to 58.8% of laboratory-bred Lu_. anthophora (Addis) 

 were infertile, based on percent fertile egg batches. In laboratory- 

 reared Lu_. diabol ica , the percent fertile egg batches per generation 

 remained fairly constant until the 7th through 9th generations (Table 

 3-1). Low fertility in these generations probably reflects poor 

 mating success due to small adult numbers and long generation times, 

 which produced asynchronous male/female emergence patterns (many males 

 died before the females emerged). 



Johnson and Hertig (1961) reported a 23% hatching rate in 

 laboratory-reared Lu. sanguinaria as opposed to 92% in eggs of wild- 

 caught flies. The corresponding rates for laboratory-reared and wild- 

 caught Lu_. dj_abol_ica were 28.9 and 50.4%, respectively (Table 3-1). 

 These figures are probably low due to the difficulty in assessing 

 hatching rates in egg batches with quiescent eggs. In routine 

 maintenance, egg hatch was checked for the first 20 days only, and 

 unhatched egg batches were discarded after thirty days. These data 

 are, however, consistent with Endris' (1982) description of "partial 

 fertility" in laboratory reared Lu. diabol ica eggs in which as many as 

 70% of the eggs laid by a single female failed to hatch. Perkins 



