The study on biodiversity of forensically important Diptera in the tropical rain
forest in Malaysia is scarce. Thus, a preliminary survey was conducted at a jungle fringe near
Kampung Bahagia Bukit Lagong, Sungai Buloh, Selangor. A rat carcass was offered to attract
carrion flies and we collected an adult female calliphorid, Hypopygiopsis fumipennis (Walker,
1856) during the fresh stage of carcass decomposition. The female fly was allowed to oviposit
on chicken liver in a container and the resulting larvae were reared to the adult stage. Along
the developmental process, several individuals from each instar were collected and preserved
in 70% ethanol and then processed on the slides. We recorded the duration of development for
each instar and described its larval features for the first time. The third instar larvae of H.
fumipennis showed accessory oral sclerite present, anterior spiracle with 13-15 papillae,
intersegmental spines mostly unicuspid with pointed end, and posterior spiracles heavily
sclerotized with inter-slit projections. Some larval differences between H. fumipennis and
Hypopygiopsis violacea were noted.