C4L0SSTNA MOESITANS AND ALLIES. 9^ 



reply, dated "Vienna, 18. iii. 1902." — "The specimen sent is the 

 firiginal type. The label placed beside it is Wiedemann's original 

 one, and bears his handwriting." In view of this statement it is 

 useless to dilate further upon apparent discrepancies between 

 description and type, and the species desciibed above must be 

 taken as the true Glossina longipalpis, Wied. 



As has already been stated in speaking of the affinities of 

 Gl. morsitans (p. 87) : — " Glossina morsitans, Westw., Gl. longi- 

 jia]pis, Wied., and Gl. pallidipes, sp. nov., form a group of closely 

 allied species, of which Gl. palpalis, Rob.-Desv. is a somewhat 

 more distant connection." Through all of these species there can 

 be traced with greater or less distinctness the fundamental 

 system of abdominal markings, consisting essentially of a series 

 of dark transverse bands, interrupted on the median line, and 

 occupying a larger or smaller area of the upper surface of the 

 segments. Gl. palpalis, however, is distinguished at once by its 

 entirely dark hind tarsi. 



Of the remaining species Gl. pallidijycs is distinguished from 

 the other two by the front and middle tarsi being entirely palo, 

 and in the <J by the narrower front. The absence of the dark 

 tips to the last two joints of the front and middle tarsi seems 

 to be a reliable character, and one that cannot be due to pos.sible 

 bleaching or immaturity, since the last two joints of the hind 

 tarsi are invariably dark. Altogether there need, I think, be 

 no hesitation in accepting Glossina pallidipes as a good species. 

 Apart from the tarsi, females of Gl. pallidipes are nob easy to 

 distinguish from females of Gl. longipalpis, though from females 

 of Gl. morsitans they are readily distinguishable by the depth of 

 the abdominal bands. In both sexes, too, Gl. pallidipes may 

 easily be distinguished from Gl. morsitans by the shape of the 

 third joint of the antenna, which in the former species is long 

 and narrow, with the apex pointed and (especially in the female) 

 conspicuously turned forwards ; in Gl. morsitans the third joint 

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

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

 blunter and not so much tui-ned forwards ; the arista is also 

 shorter in morsitans than in pallidipes. To facilitate comparison, 

 the antennae should be removed with the point of a fine scalpel, 

 mounted in glycerine and examined under a lens. As regards 

 the males, even though the front and middle tarsi be wanting, 

 a male of pallidipes can be distinguished from a male of longi- 

 polpis^ by the front being narrower, especially at the vertex, 



