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Hatching of eggs of Dipetalogaster maximus kept under different climatic conditions.

The use of D ipeta logaster maximus in xenodiagnosis has been reviewed2. We continue to investigate relevant biological aspects ofthis species. We report here the results of exposing newly laid eggs to more controlled temperature (mean 28 °C, range 27-30°C) and humidity (50% mean, range 47-50) and to Brasilia enviromental conditions (temperature 22°C, range 10-34; humidity 40%, range 10-90). Experiences were duplicated using 40 eggs in each batch. The results shown in the Figure 1 confirm previous observations1. Egg lots maintained in ambient conditions hatched in a mean of 36 days (range 21-47). Those in the more controlled conditions of our insect colony hatcher earlier (mean 23 days, range 12-27). The results confirm the value of keeping the colony under controlled ambiental conditions.