On the Entomology of the Illinois River and Adjacent Waters |
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abdominal abdominal segments abundant anal prominence annuli antennae anteriorly apex apical appendages aquatic atratus basal base beneath blackish breeding-cage broad brownish Champaign counties chitinous Chrysops cincta collected dark brown darker diameter Diptera distinct dorsal dorsal and ventral dorsal areas dorsal view eggs eluta Erioptera false feet female filaments four fringe fuscous genus gills Havana head horse-fly Hydrocampa Illinois Illinois River imago joint July June labrum Larva Fig larvae lateral areas longitudinal mandibles median line mesothorax metathorax middle minute narrow nearly ocelli Odontomyia ovipositing pale paler parasite Plate posterior divisions posteriorly prothorax pubescence pupa Quiver Lake respiratory tube river scutellum Sept setae shining shore short side slender slightly smooth species spines spiracles spot Station stigmatal striated striation subopaque surface sutures Symplecta Tabanidae Tabanus taken tapering tarsi thorax Tipula tooth transverse tubercles upper Urbana usually vegetation ventral areas vittae whitish yellowish