BASED ON A STUDY OF THE MALE GENITAL ARMATURE. 33 
dilated distally ; lips reflexed ; editum (¢), or lappet-like extension of the body wall, 
with numerous long hairs. Apart from the form of the superior claspers there 
is no marked difference between the armature of this species and that of 
G. submorsitans. 
Sixty-five examples have been examined. 
A I 
Glossina submorsitans, Newstead. 
G. submorsitans, Newst., Ann. Trop. Med. and Pavasit., IV, p. 371 (1910). 
Nearly related to Glossina morsitans, Westw., in having the tips of all the 
tarsi dark. There are two well-marked varieties : a dark form and a light form. 
The former may be readily distinguished by its general dusky or dull vinous grey 
colour and generally smaller size ; the pale form, however, very closely, resembles 
G. morsitans in the general colour of the abdomen; but in both forms the 
transverse black abdominal bands are : 
(a) much more clearly and sharply defined ; 
(b) equally and more narrowly interrupted in the median line on the third, 
fourth, and fifth segments : 
(c) slightly rounded medially and suddenly tapering towards the lateral 
margins. 
In G. morsitans the bands are : 
(a) not so sharply defined medially ; 
(b) unequally interrupted in the middle line, the space between the two 
divisions of the band on the third being much greater than the space 
between those on the fifth segment ; and the dark colour gradually 
shading off into the pale colour forming the median line ; 
(c) broadly rounded medially and very gradually tapering towards the 
lateral margins. 
The genital armatures of the males of these two species are easily separable 
by the form of the median lobes (figs. 16, 17, m/) and other characters 
(see p. 36). 
Length, 7 to 8 millim; length of wing, 7 to 8 millim. 
Dark Form.—Head. Frontal stripe smoky brown or red brown to ochreous, 
ridges paler ; cheeks clothed with greyish dust; jowls clothed with long white 
hairs ; roof of buccal cavity with two more or less angular patches of brown. 
Antennae dusky ochreous grey to pale red-buff, sometimes infuscated at the 
tip ; arista with the proximal ventral portion dark brown. Papi greyish buff ; 
usually cinereous above, apical portion infuscated, tips usually black. Thora 
grey, often with a faint vinous tinge, the elongated brownish markings sometimes 
reduced to small and more or less elongated spots; scutellum normal ; pleurac 
ochreous grey. Abdomen olivaceous grey (greenish grey), generally with a 
vinous tinge, paler at the margins ; second (first visible) segment generally with 
a large infuscated blotch on each side, near the outer lateral margin of which is 
a clearly defined small blackish brown spot ; in some instances the small spot is 
quite separated from the infuscated blotch, in others the small spot only is 
visible ; segments 3 to 6 with clearly defined brownish black bands interrupted 
19127 (6, 
