E. Camillo et Ad. Brescovit, Spiders (Araneae) captured by Trypoxylon (Trypargilum) lactitarse (Hymenoptera : Sphecidae) in southeastern Brazil, REV BIOL TR, 47(1-2), 1999, pp. 151-162
Fifty one nests and 200 cells of Trypoxylon (Trypargilum) lactitarse were o
btained from trap-nests (cut bamboo stems) in Santa Carlota Farm (in two ha
bitats: Itaoca Section-IS and Santana Section-SS), Cajuru and on the Sao Pa
ulo University Campus, Ribeirao Preto (RP), both in the State of Sao Paulo,
Brazil. The prey (spiders) of 18 cells from IS, 38 from SS and 70 from RP
were identified. Nesting most frequently occurred during the hot and wet se
asons (September to April). T. lactitarse preyed upon representatives of te
n spider families. Araneidae (96.6%) (orb-weaver spiders) were the most fre
quent. Eustala sp.1 was the most frequency collected species in the three h
abitats (31.6% in IS, 20.1% in SS and 48.7% in RP), followed by Acacesia ha
mata (19.5%) and Alpaida leucogramma (10%) in IS, by Parawixia audax (16%)
and A. hamata (15.4%) in SS and by P. audax (17.9%) and Eustala sp.2 (12%)
in RP. The sizes of the reproductive niches were significantly different. T
here was a positive correlation between reproductive niche width and evenne
ss.