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The population of Toxorhynchites splendens in the rural area of the administrative city of Banjarbaru is quite abundant. This can be developed as part of the control management of Aedes sp. and Culex sp. as disease vectors. The purpose of this study was to test the predation ability of Tx. splendens against larvae of Ae. aegypti and Cx. quinquefasciatus and larval development time of Tx. splendens fed with larvae of Ae. aegypti and Cx. quinquefasciatus. The study used a completely randomized design with 10 replications. The results obtained were the predation ability of Tx. splendens larvae from instar 2 to pupae against larvae of Ae. aegypti and Cx. quinquefasciatus were 5.5 larvae/day and 6 larvae/day, respectively. The average length of the developmental phase of Tx. splendens larvae fed with Ae. aegypti and Cx. quinquefasciatus was 14.55 days and 12 days. The conclusion of this research is Tx. splendens originating from the city of Banjarbaru has the power of predation against Ae. aegypti and Cx. quinquefasciatus.

Flies are one type of insect, which decompose the organic component in animals, and human cadavers. Therefore, the insects can be used to help the investigators related to human law. One of the methods to determine Post Mortem Interval [PMI] was by identifying the insects that come in the decay process. Some chemicals can affect the development of the insect and its life cycle. Cyanide is widely used to commit murder in Indonesia. The effect of cyanide on the development and life cycle of insects is a very interesting field to study. The purpose of this study was to determine the effect of cyanide exposure to larvae weight for PMI estimation. This research was an experimental research that used larvae of Wistar rat carcass. The control group was killed by neck dislocation, while experimental group were killed by oral lethal doses of cyanide. Data were obtained from the measurement and examination of larvae, started from the 1st day until 4^th day after death. Chrysomya, Sarcophaga, and Lucilia larvae were identified from this study. Sarcophaga larvae first appeared and next day followed by Chrysomya and Lucilia. There were significant differences in Chrysomya larvae weight. There were Chrysomya third instar larvae on the 4^th day on cyanide group, with 56.4±16.8 mg of weight. There were Chrysomya third instar larvae on the 4^th day on control group, with 30.4±5.5 mg of weight. The differences of larvae’s weight, among Sarcophaga and Lucilia larvae, could not be determined because there were not enough samples. Chrysomya third instar larvae of cyanide group significantly heavier than control group on 4^th day. The differences of larvae weight, among Sarcophaga and Lucilia larvae, could not be determined because there were not enough samples.