DC医学资料法医昆虫学

Two spiracles (each with 3 slits) 3rd instar
Remarks: 1st instar 1 slit within each spiracle 2nd instar 2 slits within each spiracle 3rd instar 3 slits within each spiracle
Activity 9.1 Introduction of Forensic
Entomology
• Introduction of Forensic Entomology (http://www.nhm.ac.uk/nature-online/nature-
live/video-archive/videos/forensicentomology/ )(an on-line video by Martin Hall of Natural History Museum of London) (suggested episode for video watching: 00:00 - 16:27))
Source: http://www.padil.gov.au (Pests and Diseases Image Library)
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Chrysomya megacephala (Found in HK)
• Order (目) • Family (科) • Genus(種) • Species(屬)
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Genus name
Species name
南亞寡鬃實蠅 Pumpkin Fruit Fly (Bactrocera tau)
Source: Hong Kong Insects (2007) (Friends of the Country Parks & Cosmos Books Ltd)
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Chrysomya megacephala (紅頭麗蠅) (Bluebottle)
Diptera (雙翅目) Calliphoridae Chrysomya megacephala
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Larva
NOT TO SCALE
Pupa 6-10 mm
3rd instar 10-15 mm
Life Cycle of a Blow Fly (Complete Metamorphosis)
2nd instar 5-8 mm
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Taxonomy of True Flies
• Kingdom (界) Animalia (動物界)
• Phylum (門)
Arthopoda (節肢動物門)
• Class (綱)
Insecta (昆蟲綱)
• Order (目)
Diptera (雙翅目)
• Family (科) Calliphoridae (Blow Flies) wk.baidu.comarcophagidae (Flesh Flies)
Source: http://store.sirchie.com/Search.aspx?k=Forensic+entomology+kit (SIRCHIE)
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PMI (Post Mortem Interval)
• PMI – the time elapsed since death • PMI usually correlates with the age of the
1st instar 2-4 mm
Source: http://www.forensicentomologist.org/
Egg 2-3 mm
Adult
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Posterior blunt part (spiracles for breathing)
A maggot (larval stage)
Anterior pointed part (mouth for eating)
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Taxonomy of insects
• Kingdom (界) • Phylum (門) • Class (綱) • Order (目) • Family (科) • Genus(種) • Species(屬)
Animalia (動物界) Arthopoda (節肢動物門) Insecta (昆蟲綱) X, Y, Z … A, B, C, … D, E, F, … G, H, I, …
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The puparial case is usually oval in shape and changes colour over time. The colour of the puparial case of different blow fly species varies.
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Forensic Entomology Kit
Genus name
Species name
金蠅 Blow Fly (Chrysomya sp.)
Source: Hong Kong Insects (2007) Source: Hong Kong Insects (2007) (Friends of the Country Parks & Cosmos Books Ltd)
oldest immature blow fly stage developing on the corpse. • Depending on the species of the blow flies and the environment such as ambient air temperature the development of the blow flies may take several weeks or months.
…
• Genus(種) …
• Species(屬) …
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True Flies of Hong Kong
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Genus name
Species name
亞麻蠅 House Fly (Parasarcophage sp.)
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Source: Hong Kong Insects (2007) (Friends of the Country Parks & Cosmos Books Ltd)