BASED ON A STUDY OF THE MALE GENITAL ARMATURE. 19 



relatively short, with a broad band-like upper surface. Harpes (A) protected by 

 a thin membrane which is clothed with small squamiform spines ; as far as one 

 can ascertain by an examination of the armature in optical section, these spines 

 are not attached to the harpes, as they are seen to extend beyond them on the 

 thin mantle-like wall which completely envelopes the penis sheath ; the terminal 

 process of the harpes lies concealed beneath the squamose spines in one instance ; 

 in another specimen it projects beyond them as shown by dotted lines in fig. 5 ; 

 it is somewhat falciform in shape, and formed of black chitin. Vesica (v) with a 

 broad and apparently detached sclerite on the ventral surface ; upper or proximal 

 surface with several distinct transverse folds, presenting at the edge a distinctly 

 serrated appearance. 



Grlossina brevipalpis, Newstead. 



G. birvipalpis, Newst., Ann. Trop. Med. and Parasit., IV., p. 372 (1910). 



This tsetse-fly is easily recognised from the two western representatives of the 

 fusca group {G. fusca and G. nigrofusca) by its shorter and stouter palpi, its 

 more robust form, and the generally paler colour and somewhat indefinite 

 thoracic markings ; and again in the morphological characters of the male 

 armature (figs. 6, 7), by the great length of the median process (mp), the 

 ])resence of the long bilateral row or band of squamose spines (•■>), and in the 

 form of the harpes. 



Length, 10-12 mm. ; length of wing, 11-11^ mm. 



Thorax jjale to dark brown, with greyish-brown longitudinal stripes and 

 markings, often more or less obscure. Abdomen dark brown to smoky brown ; 

 second segment rarely much paler than the others. Legs ochreous brown ; tips 

 of middle and hind tarsi black ; anterior tarsi generally without dark tips. Palpi 

 relatively short and stout. 



Male. Head with the front uniformly pale ochreous brown, frontal margins 

 brighter ; eyes slightly converging. Antennae pale ochreous with the anterior 

 half infuscated ; arista infuscated at the base. Palpi relatively short and stout. 

 Thorax dark brown, with the markings dusky grey-brown ; these vary in 

 intensity but are usually more or less indefinite. Abdomen dark brown ; second 

 segment scarcely paler than the others ; margins and posterior angles sometimes 

 narrowly paler. Leffs pale ochreous brown ; last two segments of middle and 

 liind tarsi dark, blackish ; last two segments of front tarsi either with or without 

 brownish tips ; front femora infuscated dorsally and slightly also internally ; 

 hind tibiae with a more or less distinct infuscated band ; venter, in examples 

 which have not partaken of a meal of blood, pale ochreous brown, margins of the 

 third to the sixth segments infuscated ; stigmata dusky ochreous. 



Female. Colour and pattern closely resembling that of the male, but with the 

 hind and lateral margins of the abdomen sometimes more strongly pronounced. 



Type Q Songwe Eiver, N. Nyasa 7. I. 09 [Dr. J. B. Davey). Co-type males 

 from near Kaporo, N. Nyasa, 5. VIII. 09 {Dr. J. B. Davey). 



Genital armature of the male (figs. 6 and 7). Superior claspers (*c) free and 

 strongly and bluntly bidentate ; they are also narrowly separated when fully ex- 

 tended (fig. 7) ; bristles on the inner surface much longer than those on the outer 

 19127 B 2 



