DESCRirTION OF GLOSSIXA MORSITAXS. 81 



stouter and longei-, but in the 9 the difFcrcnce, if any, is less 

 noticeable. • 



Except for the more or less distinct pale triangle on the 

 second segment, there is no trace of a pale median longitudinal 

 stripe on the abdomen of Gl. pallicera, and the narrow pale hind 

 margins to the abdominal segments, usually distinguishable in 

 the case of Gl. palpalis, are likewise absent. Thus the abdomen 

 of Gl. podUcera is unicolorous, though the presence of the narrow 

 lateral cinereous triangles on the segments from the third to 

 the sixth shows the connection with Gl. palpalis, in which the 

 banded type is clearly traceable, though far less distinct than in 

 Gl. morsitans, lougipalpis, or pallidipes. 



Glossina morsitans, Westw. 



(Plate III.) 



Glossina morsitans, Westwood, Proc. Zool. Soc. Lond., Pt. XVIII., 

 p. 261, PL IX., figs. 1, I'-l' (1850); Kirk, "On the ' Tsetse ' Fly of 

 Tropical Africa " {Glossina viorsitans, Westwood), Journ. Linn, Soc, 

 Zoology, Vol. VIII., pp. 149-156 (1865) ; Westwood, Gates' " Matabele 

 Land and the Victoria Palls," Appendix, pp. 363-364, Pis. G, fig. 2, 

 and H, figs. 5, 5*, 5" (1881) : Bigot, Ann. Soc. Ent. France, 6« S^rio, 

 T. 5, p. 123 (1885) : V. von Roder, Jahrb. der Hamb. Wissensch. 

 Anstalten, X. 2, p. 205 (1893).* 



Glossina longipalpis, Macquart {mc Wiedemann), Dipteres Exotiques, 

 Suppl. IV., p. 239, Tab. 22, fig. 4 (1850) ; ? Schiner, Rcise der Oster- 

 reichischen Fregatte Novara, Zoologischer Theil. Bd. II., Diptera, 

 p. 311 (1866), 



^ , 9 . Length, Tj to Of millim. (3 J to 41 lin.) ; length of wing, 

 7i to 9 millim. (34^ to 4 lin.) ; width of head, 2^ to 2§ millim. 

 (1^ to 1 J lin.) ; width of front at vertex in $ I, in ^ i of total 

 width of head measured across middle of eyes. 



Thorax mouse-grey^, often somewhat paler in front, with more or 

 less distinct brownish longitudinal markings ; abdomen varying from 

 drab-gi-ey f to ochraceous-buff,\ the segments from the third to the 

 sixth inclusive with very conspicuous darlt-brown bands, interrupted, 



* Record of the finding of the species by Dr. Fr. Stuhlmann at Mbu- 

 sini, in Usegua, German East Africa, 27. viii. 1888. 

 t Ridgway : " Nomenclature of Colors," PI. II. 

 X Ridgway, op. cit. PI. V, 



