. African bombyliidae. Bombyliidae; Diptera. 1927] Curran, Diptera of the Belgian Congo 41 Tbyridanthrax ternarius Bezzi T. ternarius Bezzi, 1924, 'Boml). Ethiopian Reg.,' p. 209. The collection contains a female from Faradje, Jan., 1912, which differs from the description only in having the discal cell almost wholly infuscated, although the immediate apex is paler. The legs are mostly missing, only one hind one being intact. Thyridanthrax species Four specimens, only one in fair condition, apparently represent an undescribed form but, owing to the fact that it is impossible to determine the c
. African bombyliidae. Bombyliidae; Diptera. 1927] Curran, Diptera of the Belgian Congo 41 Tbyridanthrax ternarius Bezzi T. ternarius Bezzi, 1924, 'Boml). Ethiopian Reg.,' p. 209. The collection contains a female from Faradje, Jan., 1912, which differs from the description only in having the discal cell almost wholly infuscated, although the immediate apex is paler. The legs are mostly missing, only one hind one being intact. Thyridanthrax species Four specimens, only one in fair condition, apparently represent an undescribed form but, owing to the fact that it is impossible to determine the color and extent of the pile, it is not deemed advisable to describe the species. So far as I can determine, it is closely related to T. inauratus Klug, from which it differs in having the wing less extensively black, the black pattern being not quite so extensive as in Exoprosopa dimidiata Macquart (see Bezzi, 'Bomb Eth. Reg.,' p. 303) but much the same out- line. The specimens are from the following localities: male, Banana, June, 1915; 3 females, Faradje, Nov., 1912. Systropus Wiedemann There are two species in the collection, one of which belongs to the group having the abdominal petiole composed of only two segments, and appears to be undescribed. It differs from related species in having the eyes dis- tincth' separated on the front. Systropus snowi Adams S. snowi Adams, 1905, Kans. Univ. Sci. Bull., Ill, p. 156. A female from Thysville appears to be- long here, although differing slightly from the description. The wings are wholly brownish and the eyes narrowly separated, the frontal triangle long and slender. In the few species of Systropus known to me there is considerable variation in color and in or- der to properly differentiate the species I beheve that the genitalia will have to be studied. In the females these possess excellent characters and the same is also true of the males. The lower genital plate of S. snowi is shown in Fig. Fig. 1. Systropus snowi Adams.
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