. Bee flies of the world: the genera of the family Bombyliidae. Bombyliidae; Parasites. TOXOPHORINAE 233 Hesse (1938), pp. 1032-1036, key to 7 male and 7 female species from South Africa. Efflatoun (1945), pp. 186-187, key to 3 species from Egypt. Bowden (1964), p. 53, key to 3 species from Ghana. Strange, stout, robust flies of small to medium size, which are readily recognized by the characteristic humpbacked form and the long, basally stout, apically pointed, much curved bristles upon the thorax. The legs also have spinelike bristles. They are black insects with bands and spots of matted pa
. Bee flies of the world: the genera of the family Bombyliidae. Bombyliidae; Parasites. TOXOPHORINAE 233 Hesse (1938), pp. 1032-1036, key to 7 male and 7 female species from South Africa. Efflatoun (1945), pp. 186-187, key to 3 species from Egypt. Bowden (1964), p. 53, key to 3 species from Ghana. Strange, stout, robust flies of small to medium size, which are readily recognized by the characteristic humpbacked form and the long, basally stout, apically pointed, much curved bristles upon the thorax. The legs also have spinelike bristles. They are black insects with bands and spots of matted pale-colored pile on the strongly decumbent abdomen; a few tropical species are metallic green or violaceous. The head is also de- cumbent and the antennae long with the third segment attenuate and sharp at apex; most males have a brilliant patch of silver pollen on the inner side of the second segment. The nearest relative is Marmasoma AVliite, a Tas- nianian and Western Australian genus; it differs from Toxophora in the shorter, nonscaly antennae, the less conspicuously drooping head and abdomen, the open anal cell, and the long full row of bristles on each side of the front. Toxophora species are distributed throughout all world regions but appear to be most abundant in the Southwestern United States and western Mediterran- ean. Length: 6 to 12 mm., including antennae; wing, 4 to mm. Head, lateral aspect: The head is subglobular, while the eye is only hemicircular and constitutes the greater part of tlie head anteriorly. The occiput is more or less swollen posteriorly both in males and females and heightened by dense, spikelike, long pile, or bristles ex- tending backward. The occiput is most extensive cen- trally, with small, shallow medial depression where the head is joined to the thorax, and from this point it is quite convex and slopes strongly out to the eye margin. Outer part of the occiput covered with dense, appressed scales reaching to the eye margin. Posterior p
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Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectparasites
