8 M K. 0. V. A. PEEL AND OTHERS ON [Jan. 23, 



clothed vilh <;<>I<I(H 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 tin apex of the anal cell, hyaline. 



lhad with an area surrounding the bases of the antenna;, 

 extending from eye to eye, and including the lowest third of the 

 front and an equal space below the antenna?, covered with white 

 dust ; face on each side below the antenna sparsely clothed with 

 fine silvery hairs ; cheeks dark brown ; occiput covered with greyish 

 • lust, and base of head below thickly clothed with short white 

 hairs ; antenna uniformly black, a distinct shoulder at the base of 

 the third joint above. Thorax with a few short golden hairs in 

 front of scutelium ; pectus clothed with silvery-white pile, which 

 extends on to the pleura; above the front coxa?, 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 scutelium 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), aud continued on the ventral side as a narrow trans- 

 verse band. Lege : co.ra> greyish pollinose, and clothed with 

 silvery-white pile ; tibke 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 

 Eiver, 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. Iricchettii 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 four ', 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 

 leucaspis, v. d. "Wulp (Notes Levden 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 Ca.pt. Sw ayne in Somaliland, from 



1 There is a discrepancy between Bezzi's diagnosis and his detailed descrip- 

 tion : in I lie Conner lie writes (op. cit. p. 181) " abdomine fasciu tribus tr<m»- 

 attomento ahndo ml marginem posticwm segmentorum," while in the Utter 

 he describes (p. 182) the fourth segment also as "a orlatura posteriore bianca," 

 with the dorsum " Foniito di peli bianchi " : he describes the 5lh. Gth, and 7t'h 

 segments as "a peli l.rruginosi." 



