Abstract: The forensic important fly Aldrichina grahami (Aldrich) was reared at different temperatures to examine its morphological change during growth. The results showed that structural traits of posterior spiracles, skin and digestive dust regularly changed with larval growth and could be used as larval age markers. According to these, the whole larval life span of A. grahami could be divided into 8 stages: 1st instar, late 2nd instar, pharate 3rd instar, opened peritreme stage, thick closed peritreme stage，thin closed peritreme stage, thick closed peritreme stage, prepupa stage. The duration of these stages depended on the temperature tested.

Key words: forensic entomology, Aldrichina grahami, larval morphology, developmental stage, temperature