-157- 



from Ethiopia. The mean number of eggs in _Lu. diabolica batches 

 (28.1) is low compared to P. longipes but comparable to that reported 

 by Johnson and Hertig (1961) in several Panamanian species and by 

 Endris (1982) and Perkins (1982) in other USA species. 



Most Lu. diabolica females completed oviposition in 24 hrs or 

 less at 27°C and 100% RH. The process is apparently very exhausting, 

 since fewer than half survived long enough to complete oviposition and 

 take a second blood meal. Only a few of those that took a second 

 blood meal completed a second gonotrophic cycle; most died within two 

 or three days after the second meal. In contrast, multiple refeedings 

 and up to four gonotrophic cycles have been reported in other sand fly 

 species (Lu_. fl aviscutel 1 ata , Ward, 1977; Lu_. anthophora , Endris, 

 1982; P. dubosqui Neveu-Lemaire, Beach, 1984). Beach (1984) reported 

 that 75% of P. dubosqui females in a laboratory colony survived 

 oviposition, took additional blood meals and completed a 2nd and, in 

 some cases, a 3rd gonotrophic cycle. Further studies designed to 

 increase postoviposition survival and refeeding in Lu. diabol ica are 

 planned and will clearly be of interest, particularly as they relate 

 to the success of leishmaniasis transmission studies. 



Autogeny . Although it was not observed in Lu_. diabol ica , 

 autogeny is known to occur in at least two other USA species of sand 

 flies, Lu. shannoni and Lu_. cruciata (Perkins, 1982). 



Age-Specific Life Table 



Life tables are devices that record in a systematic fashion those 

 facts basic to the age distribution of mortality (Morris and Miller, 

 1954). They were first used by insurance companies for human 



