. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 405 55. Two tubercles above anal area; posterior spiracular field with distinct processes around it. (Fig. 729, Pegomyia) ANTHOMYilDiE, part Four or more tubercles above anal area; slits of spiracular plate usually pointed at inner end. (Fig. 732 B, Muscina) MXJSCIDjE, part 56. Posterior spiracular plates each with a button, slits rather trans- verse. (Fig. 732 C, Calliphora) CALLIPHORID^E a. Larva with sclerotized area on ventral part of third segment MESEMBRINELLiNiE Larva without such scle
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 405 55. Two tubercles above anal area; posterior spiracular field with distinct processes around it. (Fig. 729, Pegomyia) ANTHOMYilDiE, part Four or more tubercles above anal area; slits of spiracular plate usually pointed at inner end. (Fig. 732 B, Muscina) MXJSCIDjE, part 56. Posterior spiracular plates each with a button, slits rather trans- verse. (Fig. 732 C, Calliphora) CALLIPHORID^E a. Larva with sclerotized area on ventral part of third segment MESEMBRINELLiNiE Larva without such sclerotized area b b. Third instar larva with spiracular button within closed peritreme which extends between the slit-like apertures RHINIiNiE Third instar larva with circular peritreme, which does not extend between the three apertures c. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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