-77- 



or body warmth, may aid them in finding a blood meal. This may also 

 be a genetically selected, triggered-sequence response, i.e., lights = 

 people = food. For whatever the reason, their response to light 

 contributes to the success of light-trapping, and several workers have 

 collected Lu. diabol ica by this method (Young and Perkins, 1984). 

 Indeed the lighted latrines at Garner State Park and Fawcett Boy Scout 

 Camp functioned as giant light traps. The exposed positions of the 

 positive latrines was somehow important, since those at lower 

 elevations in more protected positions yielded nothing. Perhaps they 

 were more visible and attracted flies from considerable distances. It 

 may also be that the sand flies were seeking something other than a 

 blood meal, such as shelter. As was the case at the farm in D'Hanis, 

 CDC light traps may not be bright enough to attract sand flies and 

 must be augmented with CO-2 ( dr Y ic e). The brighter lights of the 

 Shannon trap and the New Jersey light traps were apparently sufficient 

 to attract foraging flies. 



The distance traveled by a sand fly to its host may depend upon 

 the habitat and the species. Estimates by other workers of distance 

 traveled to light ranges from 200 m in a neotropical forest (Chaniotis 

 et aj_., 1974), to as far as 2300 m in open habitat (Kil 1 ick-Kendrick 

 and Rioux, 1981). These authors also suggested that the movement of 

 females is a hunting strategy and hence the difference in dispersal 

 distance between males and females. Since Lu. diabol ica occurs in a 

 rather open habitat, it is likely that they disperse a considerable 

 distance (1000 m or more) from the unknown breeding site. Males 

 probably have a more limited flight range. The greater number of 

 males found in resting collections at Fawcett Boy Scout Camp may 



