26 KOBERT NEWSTEAD — A REVISION OF THE TSETSE-FLIES (GLOSSINA), 



Glossina fuscipes, Newstead. 



G.fuscipes, Newst., Ann. Trop. Med. and Parasit., IV, p. 375 (1910). 



This tsetse-fly may be readily distinguished from G. palpalis, by its much 

 smaller size, by the uniformly infuscated or dusky legs, and the dusky grey 

 thorax. In size it resembles G. tachinoides, Westw., but it is a relatively stouter 

 built insect ; and altogether it is most like a dwarfed specimen of G. palpalis 

 with infuscated legs and dusky thorax. The genital armature resembles those of 

 G. palpalis and G. tachinoides in its general form : but the superior and inferior 

 claspers are quite distinct from those of either of these insects. 



Length, 1\ mm. ; length of wing, 8 mm. 



Male. — Head with the frontal stripe yellowish brown, margins dusky white ; 

 ocellar triangle bufl\, enclosing a very dark brown spot. Antennae grey ; arista 

 dark brown ventrally. Palpi smoky brown with a paler narrow median line. 

 Proboscis with the bulb dark piceous. Thorax with a median dark grey rec- 

 tangular area extending from the front to the scutellum, the sides of which are 

 perfectly straight and parallel : on either side of the grey area are two greyish 

 black and somewhat triangular blotches, evidently remnants of those found in 

 other species of Glossina ; scutellum dark grey with a very faint pale grey median 

 line, margins buff; sides of the lateral thoracic depressions dark brown or almost 

 black ; pleurae dark grey. Abdomen resembling that of G. palpalis, but the 

 transverse banding somewhat pronounced ; lateral margins with pale angular 

 areas. Leys strongly and almost uniformly infuscated (dark or smoky grey) ; 

 femora with the basal and inferior portions ochreous butf ; hind tarsi all dark 

 brown or almost black. Wings with the anterior transverse vein strongly and 

 suddenly incrassate at its junction with the third longitudinal vein. 



Genital armature of the male (fig. 12). Superior claspers {sc) sub-cheliform ; 

 suddenly curved inwards distally, at a point about two-thirds of the distance from 

 the base, so suddenly on the outer margin as to present an almost angular or 

 elbowed appearance ; distal extremity furnished with a strongly curved tooth or 

 claw-like process, the constriction heinij on the inner lateral margin ; proximally 

 they are rather broad and have a distinct beak-shaped base, the apex of which 

 points inwards ; bristles relatively short, those on the inner lateral margin more 

 spinose in character and attached to transparent cliitin. Inferior claspers (ic) 

 very broad with a large and almost circular emargination on the outer lateral 

 margin, distally ; stem of the foot-like extension slightly curved inwards, the 

 terminal portion relatively narrow and bluntly pointed. Chitinous walls of the 

 vesica (v) with a few squamose spines ; it is possible that these form the rudi- 

 mentary harpes. Connecting membrane as in other members of this group. The 

 juxta, vesica and some other organs became displaced in the process of mounting 

 the armature, so that they lie in an asymmetrical position and present a somewhat 

 peculiar aspect as may be gathered from the illustration. 



The only example which we possess of this small tsetse-fly was taken by 

 Dr. J. O. Shircore, and was forwarded with a letter dated from Nimule, Nile 

 Province, Uganda. Fortunately it proved to be a male otherwise it might have 

 been passed over as a small dusky form of Glossina palpalis. 



