Fragmentos de mata no cenário urbano podem reunir condições favoráveis à reprodução de espécies de Culicidae. No Parque Regional do Iguaçu (Curitiba, Paraná) existe uma série de cavas ou lagoas contendo vegetação aquática que pode ser utilizada pelos imaturos das espécies de Mansoniini. A investigação foi desenvolvida com objetivo de conhecer as espécies de Mansonia Blanchard, 1901 que exercem hematofagia no período diurno em área de mata no interior do parque. As coletas dos mosquitos foram efetuadas de setembro de 1999 a agosto de 2000. Três espécies de Mansonia foram identificadas, com os seguintes percentuais relativos: 74,7% de M. fonsecai (Pinto, 1932), 10,7% de M. wilsoni (Barreto & Coutinho, 1944) e 8,3% de M. tittilans (Walker, 1848). Quanto ao horário de atividade, as espécies ocorreram durante todo o dia em ritmo similar, com as seguintes médias horárias 9,5, 1,3 e 1,0 para M. fonsecai, M. wilsoni e M. tittilans, respectivamente.

Vegetation islands surrounded by urban areas can provide favourable conditions to the development of Culicidae population. In Regional Iguaçu Park (Curitiba, Paraná) there are many lakes with aquatic plants that can be used by Mansoniini immatures. The aim of this investigation was to know the Mansonia Blanchard, 1901 species that are blood feeding during the day in a wood area inside the park. The mosquitoes captures were carried out from september, 1999 to august, 2000. Three species that belong to Mansonia were identified, and the percentages were: 74.7% de M. fonsecai (Pinto, 1932), 10.7% de M. wilsoni (Barreto & Coutinho, 1944) e 8.3% de M. tittilans (Walker, 1848). By the analysis of the activity hour, the species were collected during all the day in the same rhythm, and the hours mean were 9.5, 1.3 e 1.0, respectively.

Aedes (Stegomyia) albopictus (Skuse, 1894) is an exotic Culicidae species in Brazil. Since its first report in this country, the mosquito has been increasing its geographic distribution. This mosquito is a natural dengue and Japanese Encephalitis virus vector in Asia. The females preference for oviposition sites related with homospecific immature presence was assessed. The experiment was performed with Aedes albopictus from laboratory colony since March ]999, in the Laboratório de Entomologia Médica e Veterinária, Departamento de Zoologia, Universidade Federal do Paraná. The preferred container was the one that kept pupae for 24 hours, with 643 eggs, 30,6% at total. The eggs recipients received 11,45% from total set by the females, and the following numbers to the others: larva 1 (15,79%), larva 2 (14,69%), pupa 1 (20,74%), pupa 2 (30,58%), control (6,75%). Although the ANOVA did not detect significant difference among the treatments, the data possibly indicate that Aedes albopictus prefer laying eggs in containers previously colonized by immature.