| OCR Text |
Show 8 MR. C. V. A. PEEL AND OTHERS ON [Jan. 2o, clothed with golden ochraceous pile; wings dark brown; alula, greater portion of the area behind the sixth longitudinal vein, and sometimes a narrow margin extending from the tip of the second vein to the apex of the, anal cell, hyaline. Head with an area surrounding the bases of tbe antennae, extending from eye to eye, and including the lowest third of the front and an equal space below the antennae, covered with white dust; face on each side below the antenna sparsely clothed with fine silvery hairs ; checks dark brown ; occiput covered with greyish dust, and base of bead below thickly clothed with short white hairs ; antennae uniformly black, a distinct shoulder at the base of the third joint above. Thorax with a few short golden hairs in front of scutellum ; pectus clothed with silvery-white pile, which extends on to the pleurae above the front coxae, and also in a stripe running up to the base of the wing, where the stripe ends in a fork; a narrow stripe of silvery-white pile extends from the base of the scutellum to the wing on each side. Abdomen: the white posterior margin of the second segment is narrowed in the middle above (thus leaving the black triangular area mentioned in the diagnosis), and continued on the ventral side as a narrow transverse band. Legs: coxce greyish pollinose, and clothed with silvery-white pile ; tibia with a slight reddish tinge. Wings with a fleck of silvery-white pile on the base of the first vein ; halteres tawny. Two specimens (both $ ). Type in British Museum; co-type in Hope Museum, Oxford. From Bun Feroli, north of Shebeyli Biver, West Somaliland ; June 10-20, 1895 : " biting men and animals." In the present species the eyes are bare and the first posterior cell of the wing is closed; it is therefore a true Pangonia in Bondani's restricted sense. Pangonia tricolor is closely allied to P. bricchettii Bezzi (Ann. Mus. Civ. Genov. xxxii. (1892), p. 181), also from Somaliland (Milmil). P. tricolor differs from P. bricchettii (which apparently is a somewhat smaller species) inter alia in only the first two, and not the first four1, abdominal segments being marked with white, thus leaving between the white of the base and the ferruginous tip a broad shining black space, which is absent in Bezzi's species. It may be noted that in the marking of the base of the abdomen of Pangonia tricolor there is a certain similarity to Tabanus leucaspits, v. d. Wulp (Notes Ley den Mus. vii. (1885), p. 74. pi. v. fig. 3), from the Gold Coast. The collection of the British Museum contains two specimens of Pangonia tricolor, obtained by Capt. Swayne in Somaliland, from 1 There is a discrepancy between Bezzi's diagnosis and his detailed description ; in the former he writes (op. cit. p. 181) " abdomine fasciis tmbus trans-versis ex tomento albido ad marginem postioum segmentorum," while in the latter he describes (p. 182) the fourth segment also as " a orlatura posteriore bianca," with the dorsum " Fornito di peli bianchi " ; he describes the 5th, 6th, and 7th segments as "a 2)eli ferruginosi." |
