. Annals of tropical medicine and parasitology. Parasites. 5i6 such flies as Musca patloni, Austen, and Musca convexifrons, Thomson, which have no piercing apparatus, and yet feed entirely on blood, sucking up that which exudes from the bites of Tabanus, ChrysopSy Haematopota and Pkildematomyia. The breeding habits of this fly resemble in general those of non-blood-sucking muscids. The eggs, fifty to sixty in number, are laid in cow dung, the fly appearing to prefer small patches, freshly dropped, rather than larger collections of dried dung. On alighting, the female crawls over the surface un
. Annals of tropical medicine and parasitology. Parasites. 5i6 such flies as Musca patloni, Austen, and Musca convexifrons, Thomson, which have no piercing apparatus, and yet feed entirely on blood, sucking up that which exudes from the bites of Tabanus, ChrysopSy Haematopota and Pkildematomyia. The breeding habits of this fly resemble in general those of non-blood-sucking muscids. The eggs, fifty to sixty in number, are laid in cow dung, the fly appearing to prefer small patches, freshly dropped, rather than larger collections of dried dung. On alighting, the female crawls over the surface until its finds a small crack or crevice; the ovipositor, which is similar to that of Musca domestica, is now thrust into the dung, the abdomen being depressed, and all the eggs are deposited in a heap, from 1/8 to i 4 of an inch below the surface. The process takes from six to ten minutes. When there are a large number of flies about, one often sees half a dozen or more all depositing their eggs in the same spot, their ovipositors being close to one another, while their heads are turned outwards. When the flies have finished laying their eggs an irregular heap of several hundreds will be found just beneath the surface. The eggs are laid from early morning until noon, rarely later. ?vV"'!".v:\m,,*t. Fig. i—E gt'- The egg (Fig. i) measures from 2 to 2'2 mm. long by 04 mm. broad. It is of the usual muscid shape, an elongated ovoid, gen+ly convex along one margin and concave on the other; one end is slightly more pointed than the other, but it has no spine. It is a yellowish white colour and densely opaque. On the concave margin there is a shallow groove, difficult to distinguish at the pointed end, but widening out towards the broader end of the egg. The larvae hatch out, through the groove, in from eight to nine hours, that is, on the evening of the day on which the eggs were laid. When mature, they measure about 1*25 cm., their greatest. Please note that these im
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectparasites, bookyear19
