The malarial fevers, haemoglobinuric fever and the blood protozoa of man . thoracic branches of the common duct, previ-ously mentioned. It is in these cells that the malarial sporozoites are found atthe termination of the mosquito cycle of development of the plasmodia. Life History of the Anophelinae.—The Anophelinae, in common withall mosquitoes, pass through a larval and pupal stage before development intothe perfect insect and these stages in their life history are always passed in waterso far as we at present know. I have several times observed Anopheles larvaein semi-fluid mud, and it is
The malarial fevers, haemoglobinuric fever and the blood protozoa of man . thoracic branches of the common duct, previ-ously mentioned. It is in these cells that the malarial sporozoites are found atthe termination of the mosquito cycle of development of the plasmodia. Life History of the Anophelinae.—The Anophelinae, in common withall mosquitoes, pass through a larval and pupal stage before development intothe perfect insect and these stages in their life history are always passed in waterso far as we at present know. I have several times observed Anopheles larvaein semi-fluid mud, and it is probable that development can occur in such anenvironment, provided enough moisture is retained by the soil. The Ova.—The eggs of the Anophelinae are deposited upon the surfaceof water, and are arranged separately, and not in boat-shaped masses as inCulex. The Anopheles ova are easily recognized by their lateral floats, someof which are very beautiful. The ova are oval in shape, and hatch in fromone day, as in Myzomyia ludlowii, to several days, as in other Fig. i6. —Internal Anatomy of the , Pharynx; B, oesophagus; C, dorsal reservoirs; D, oesophageal valve; and caeca; E,beginning of mid-gut; F, mid-gut; G, Malpighian tube; H, stomach; I, mid-gut ends; J,ileum; K, colon; L, rectum; M, anus; N, ventral reservoir; O, salivary glands; P, salivaryduct. (After Nuttall and Shipley.) The Larvae.—The larvae of all mosquitoes are either siphonate or asi-phonate. The asiphonate larvae always belongs to the Anophelinae, and liveonly in water, either fresh or salt. It may be said with certainty that any of thelarvae of the Anophelinae will develop in any collection of water, althoughcertai-i species breed by preference in certain localities. Theobald states thatpractically all kinds of collections of water are acceptable to the larvae; someprefer rain-water barrels, cisterns, and the water in tins, calabashes, andjam-pots; others ponds, slow-running streams,
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