Forensic Biology: Forensic Entomology - Chrysomya, ADD Method and Body Movement

This mock covers the forensic entomology sub-topics that appear most frequently in UGC-NET Paper II Unit X: species identification and colonisation ecology of Chrysomya megacephala (Oriental latrine fly) and Chrysomya rufifacies (hairy maggot fly), the developmental biology of Calliphora vicina, Lucilia sericata, Lucilia cuprina, and Sarcophaga (flesh flies), accumulated degree day (ADD) and accumulated degree hour (ADH) calculations with species-specific base temperature (Tbase) values, Megnin's eight-wave carrion succession model from La Faune des Cadavres (1894), post-mortem body movement detection through geographic insect species mismatch, and entomotoxicology with emphasis on drug concentration in larval tissue and the heroin-specific 6-MAM marker. Questions also test the admissibility of forensic entomologist testimony under Section 39 BSA 2023 (formerly Section 45 IEA 1872).

Indian forensic entomology context is woven throughout: ICMR-VCRC Puducherry provides the primary institutional reference for medically and forensically important Diptera including blow fly developmental data validated for South Asian climates. The National Institute of Epidemiology (NIE), Bengaluru, contributes epidemiological context, while published Indian casework appears in journals such as the Indian Journal of Dermatology Research (IJDR) and the Journal of Forensic and Dental Sciences (JFDS). Distractors are calibrated on single-parameter differences -- Chrysomya megacephala versus Chrysomya rufifacies morphology, ADD versus ADH temporal resolution, Calliphora versus Chrysomya base temperature (2-3 degrees C vs 10 degrees C), and Megnin's original four-wave misconception versus the correct eight waves.

Topics covered:

• Chrysomya megacephala: adult morphology, oviposition timing, Tbase (10 degrees C)
• Chrysomya rufifacies: hairy-larva predatory ecology, L3 tubercle function, succession role
• Calliphora vicina: Tbase (2-3 degrees C), cool-environment primary coloniser
• Lucilia sericata vs Lucilia cuprina: parafacial stripe, geographic roles
• Sarcophaga viviparity and its effect on the PMI developmental timeline
• Megnin 1894 eight-wave carrion succession model: wave 1 vs 2 triggers
• ADD / ADH calculation: formula, base temperature, resolution comparison
• Body movement detection: geographic insect species mismatch
• Entomotoxicology: drug concentration in maggots, 6-MAM as heroin marker
• Expert witness admissibility: Section 39 BSA 2023 / Section 45 IEA 1872

Allow 30 minutes.