A survey of grassland Asilidae (Diptera) at Jacana Eco Estate, Hilton, South Africa Author Londt, Jason G. H. KwaZulu-Natal Museum, P. Bag 9070, Pietermaritzburg, 3200, South Africa & School of Biological & Conservation Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa londtja@telkomsa.net text African Invertebrates 2020 61 1 29 48 http://dx.doi.org/10.3897/AfrInvertebr.61.50895 journal article http://dx.doi.org/10.3897/AfrInvertebr.61.50895 2305-2562-1-29 4B0D39243E014D3A9EDCF6CBA335159F 1CCA7F4D3CB555A98C0DA976F578DA16 2. Ischiolobos mesotopos Londt, 2005 Fig. 10 Remarks. This species was described mainly on a good series of specimens collected during the year-long survey of a grassland within Queen Elizabeth Park ( 29°34'S , 30°19'E ), Pietermaritzburg, when it was identified merely as "Species X" ( Londt 2002b ). The only other recorded localities were Hilton ( 29°32'S , 30°17'E ), collected in November and Cumberland Nature Reserve ( 29°30'S , 30°30'E ) collected in January and December. Adults of this species were encountered in good numbers on the first sampling day and the species remained abundant for the following three to four weeks before numbers began to decrease in weeks five and six. From week seven through to week 44, the species was absent, only reappearing in week 45. By week 49, the species was again fairly abundantly represented. The flight period of this species was therefore 14 weeks. The species appeared to be fairly uniformly distributed in both the upper and lower fields. This small species was invariably swept from long grass with very few actually being sighted. None were encountered mating or with prey. The species appears to be largely confined to Londt's (1994) ecological category 4a (within grass). Table 4 provides a comparison of flight periods with those recorded from Queen Elizabeth Park ( Londt 2002b ). Adults were encountered at approximately the same time of year and flight periods ranged from 14 weeks at Jacana to 17 weeks at Queen Elizabeth Park.