. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 239 ORDER DIPTERA (FLIES) Sub-orders and Groups A. Adults without a frontal lunule; pupa and adult escape from larval skin through a T-shaped opening at anterior end.âSub-order Orthorrhapha. B. Antennae long, with more than five joints.âNemalocera Group (Fig. 144, A). BB. Antennae short, usually 3-jointed; first anal cell narrowed.âBrachycera Group. (Fig. 144) A A. Adult
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 239 ORDER DIPTERA (FLIES) Sub-orders and Groups A. Adults without a frontal lunule; pupa and adult escape from larval skin through a T-shaped opening at anterior end.âSub-order Orthorrhapha. B. Antennae long, with more than five joints.âNemalocera Group (Fig. 144, A). BB. Antennae short, usually 3-jointed; first anal cell narrowed.âBrachycera Group. (Fig. 144) A A. Adults with a frontal lunule; pupa and adult escape from larval skin through a circular opening at anterior end.âSub-order Fig. 144.âAntennae of common Diptera. A, Xiphuria (Tipulidae). B, Sargus (Stratiomyiidas). C. Stratiomyia (Stratiomyiidae). D, Culex (Culicidae). E. Tahanus (Tabanidae). F, Leptis (Leptids). G. Chrysops (Tabanidse). H, Anthrax (Bombyliidae). /â Dasyllis (Asilidce). J, Bibio (Bibionidae). A', Gonia (Tach- inidse). L, Pollenia (Muscidae). Chief Families of the Nematocerous Orthorrhapha: A. A distinct V-shaped suture on back of thorax; legs long and slender. âTipulida (Crane Flies) p. 242. AA. No V-shaped suture on thorax. B. Veins and margin of wings fringed with scales.âCulicidce (Mos- quitoes), p. 243. BB. Margin of wings not fringed with scales. C. Anal veins wanting; Media vein wanting; tibiae without spurs. â âCecidomyiidcR (Gall Gnats), p. 245. CC. Anal veins present and Media vein at least represented by a fold. Costal vein does not extend beyond tip of 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 Lochhead, William, 1864-1927. Philadelphia : Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
