Descrição da larva, pupa, adulto macho e bionomia dos imaturos de Catachlorops Rufescens (Fabricius, 1805) (Diptera: Tabanidae) coletados em igarapés da Amazônia Central, Amazonas, Brasil

Abstract

r'he objective of this study was to evaluate morphological and bionomical aspects of Catachlorops rufescens Fabricius in igarapés (streams) in "terra-firme" (not seasonally flooded) forest in Central Amazonia. In the period from July 2007 to October 2008 larvae of C. rufesceen were collected from submerged roots of riparian vegetation in igarapés and were reared in the laboratory. Additional material that had been collected in 2002 and stored in the Aquatic Insects Laboratory of the Coordenation of Research in Entomology (CPEN) of the National Institute for Reseach in Amazonia (INPA) were also included in the present study. The sampled area included the Adolpho Ducke Reserve (ADR) in Manaus and streams in other central Amazonian counties such as Presidente Figueiredo, Manacapuru, Novo Airão and Rio Preto da Eva. The larvae were then reared in the laboratory. A total of 79 larvae were collected in 2002 and 90 were collected in 2007 and 2008. The larva, pupa and the male adult of C. rufescens are described, as well as bionomic information both for the natural environment and for the laboratory conditions under which the larvae were reared in plastic pots containing bryophytes as a substrate. The species was found in a11 of the micro-watersheds in the ADR. The larvae develop in streams on submerged roots of riparian vegetation mixed with a sand substrate. This study included 262 larvae raised in the laboratory, of which 64 reached the adult phase (3 1 females and 33 males). The larvae collected in the field were kept in the laboratory for an average of 88.2 days (* 64,65). The pupal stage lasted an average of 12.6 days (+2,92). Through a regression analysis and with Dyar's rule as a theoretical basis the number of larva1 instars was estimated at 15.