DESCRIPTION OF GLOSSINA LONGIPALPIS. 68 



abdominal segments, and by the coloration of the last two joints 

 of the front and middle tarsi, as described in the diagnosis 

 printed in italics above. In the male sex it is distinguished by 

 the narrower front, and in both sexes G. paUidipes may easily 

 be separated from G. morsitans by the shape of the third joint 

 of the antennae, which in the foi-mer species is long and narrow, 

 with the distal extremity pointed and (especially in the female) 

 conspicuously turned forwards ; in G. morsitans the third joint 

 of the antennae is shorter and much broader (about half as broad 

 again as in G. pallidipes), and darker towards the tip, which is 

 blunter and not so much turned forwards ; the arista is also 

 shorter in the other species mentioned than in G. pallidipes* 



From G. longipalpis, Wied., G. paUidipes, which is as a rule a 

 distinctly larger species, is distinguishable in both sexes by the 

 absence of sharply defined dark tips to the last two joints of the 

 front and middle tarsi ; as regards the males, even though the 

 front and middle tarsi be wanting, a male of G. paUidipes can be 

 distinguished from a male of G. longipalpis by the front being 

 distinctly narrower at the vertex than anteriorly, since the inner 

 margins of the eyes converge above, whereas in G. longipalpis 

 the front is of the same width or practically so throughout.f 



Glossina longipalpis, Wied. 



(Plate VII.) 



Glossina longipalpis, Wiedemann, " Aussereuropaische zweifliigelige 

 Insekten," Zweiter Theil, p. 254, Taf. ix, figs. 10, a, b, c (1830); 

 Macquart, Hist. Nat. des Ins. Dipteres, T. ii, p. 245 (1835), and Dipt. 

 Exot., T. ii, 3, p. 113, Tab. 14, fig. 1 (1843) ; Lichtwardt, Beitriige zur 

 Kolonialpolitik und Kolonialwirtschaft, iv Jahrg., Heft 9, p. 264, et seq., 

 figs. 1,9, 10, etc. (1903) ; Austen, " A Monograph of the Tsetse-Flies," 

 p. 90, Plate V (1903). 



(^, 9 . — Length, (^ (10 specimens) 8-4 to 9 mm.. 9 (6 speci- 

 mens) 9 to 10 mm. ; width of head in both sexes 2'75 to 3 mm. ; 



* To facilitate comparison, the antennae should be removed with a 

 needle or the point of a fine scalpel, mounted in glycerine and examined 

 under a lens. 



t IMr. Newstead's recently published conclusion that Glossina paUidipes, 

 Austen, is merely a " colour variety' " of G. longipalpis, Wied. (c/. Annals 

 of Tropical Medicine and Parasitology, Series T.M., Vol. IV, No. 3, p. 371 

 — December 20, 1910), has since proved to be erroneous, and due to the 

 specimen used for examination having been incorrectly determined. The 

 study by Mr. Newstead of further material submitted to him by the author 



F 



