Week 7 Forensic Entomology 2021 VIRTUAL

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University of Nebraska, Lincoln *

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120L

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Biology

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Apr 3, 2024

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docx

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Introduction to Forensic Science FORS 120L, Fall 2021 Week 7: Forensic Entomology and Biological Evidence (Virtual Lab) The lab consists of two parts, entomology and Pollen. Upload assignments from Entomology Overview : Insects infesting habitats, spreading disease, contaminating food products, and helping to determine time of death are some aspects of Entomology that could wind up in court. In most cases, forensic experts would be used in court to testify on Entomological issues. However, the collection of the information and evidence is often done by forensic scientists working as crime scene investigators or lab scientists. Insect Biology, Insect Identification, and Forensic Entomology are core courses for the Forensic Science Degree CSI Track at the University of Nebraska-Lincoln. This lab is designed to give all students a basic introduction to insects as forensic evidence. Insects have six legs, usually two pair of wings except for flies which have one pair, three body regions (head, thorax, abdomen), and often compound eyes.
Flies are one of the most common insects to visit a dead body. Larvae of flies, often called maggots, have distinguishing anatomical features.
The spiracles (breathing holes on the rear of a maggot or on the sides of adult insects) and other features can help to identify flies and other insects. See https://shire.science.uq.edu.au/bb/parasitology/maggots/maggot.html for an interactive maggot
identification key. During lab you will learn to identify insect body parts and anatomical features, and you will learn to use a dichotomous key to help identify insects. Erin Bauer, an Entomologist with the UNL Entomology Department, conducts the labs (this semester done virtually). In this virtual lab you will examine various maggots. You will also learn to use a dichotomous key to identify other forensically important insects. Reading Assignments (all linked in Canvas): 1. Erin Bauer, Crime Fighting Insects. (PPT lecture notes) 2. Dichotomous Keys 3. Fly Information Sheets (University of Florida) 4. Forensic Entomology Collection Manual. Helene LeBlanc Lab Assignments
1. Use a dichotomous key to identify insects in the photos provided to you below. A dichotomous key is a tool that can help you identity organisms based primarily upon physical characteristics. Dichotomous keys consist of a series of choices that lead to the correct identification. Several keys are available in Canvas to help you. You only need to identify to Order. A. This insect is in the Order ______________________________________ Chewing mouthparts Hardened outer wings Chewing mouthparts Leather-like outer wings
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