. The practical study of malaria and other blood parasites. Malaria; Mosquitoes; Trypanosoma; Blood. Ill epipharynx and hypopharynx. Antenna eleven segments. Palpi four segments. Simple eyes (ocelli) absent; thus distinguished from Bibionidae. Eyes in $ joined together (holoptic). The facets on the upper part of the eye are the larger. Egg.—Deposited in a compact layer on stones and grass. Egg measures o'40-o'i8 mm. Larva.—Twelve segments. On under side of anterior portion is a subconical retractile process crowned with bristles. Anal extremity bristly, with three short retractile tentacles. P
. The practical study of malaria and other blood parasites. Malaria; Mosquitoes; Trypanosoma; Blood. Ill epipharynx and hypopharynx. Antenna eleven segments. Palpi four segments. Simple eyes (ocelli) absent; thus distinguished from Bibionidae. Eyes in $ joined together (holoptic). The facets on the upper part of the eye are the larger. Egg.—Deposited in a compact layer on stones and grass. Egg measures o'40-o'i8 mm. Larva.—Twelve segments. On under side of anterior portion is a subconical retractile process crowned with bristles. Anal extremity bristly, with three short retractile tentacles. Pupa.—Has a respiratory tuft on each side of thorax. Pupa has spines by which it anchors itself to the cocoon. These can be found under small stones. Pupal stage about five days. Genus Simulium. Body small, hump-backed, with a hairy felt-work (to- mentum). Head small. Palpi four segments, the fourth com- posed of numerous annuli; larger in $ than in $ Antennae eleven segments, narrowing to the tip, a little longer than the head. Wings large. First, second, and third veins dark, remainder pale. $ generally black, ^ cinereous. Eyes con- tiguous in $ (holoptic) remote in ? (dichoptic).. of H aOTUS Sf Fig. 90. Wing of Lepidosdaga (Hadrus), a Tabanid. = anterior cross vein ; = posterior cross vein The Brachycera (/SpaxiJ? short, Kepag antenna) include the following :— 1.—Tabanidae (Horse-flies or gad (=sting) flies). Large flies. Antenna three-jointed, not terminating in a style or arista (the arista (when bristle-like) or style (when thick) being an appendage of the terminal portion (flagellum) of the antenna). Third segment of- antenna 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 Stephens, John William Watson, 1865-; Christophers, S. R. (Samuel Rickard), 1873-; Liverpo
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectb, booksubjectmalaria
