224 Mr. E. E. Austen on new 



yellowish hairs, except last segment, which is clothed with 

 coarse, erect^ and much longer black hair, and median 

 region of penultimate segment, which is clothed wath short 

 black hair ; ground-colour of venter ferruginous, with a very 

 broad, interrupted or subinterrupted, dark brown median 

 stripe ; second and following segments with a narrow brown 

 posterior band in front of hind margin; extreme hind 

 margins cream-buff. Wings : among the veins suffused 

 with brown are the base of the anterior intercalary vein and 

 the posterior transverse vein (together forming the distal 

 boundary of the discal cell), and the extreme base of the 

 upper branch of the third longitudinal ; alula and base of 

 anal angle brown, central portion of alula paler ; squamce 

 blackish brown. Halteres brown, knobs usually yellowish. 

 Legs : dull ferruginous pollinose, front femora, tips of front 

 tibiae, and all tarsi brownish black ; hair for the most part 

 whitish or yellowish, a conspicuous fringe on outside of hind 

 tibiaj. 



Uganda and North-eastern Rhodesia : type and two 

 other specimens from Unyoro, Uganda, halfway between 

 Masindi and Murchison Falls, January 1907 (the late Dr. 

 W. A. Densham) ; a fourth specimen from Fwambo, N.-E. 

 Rhodesia (near the south-eastern end of Lake Tanganyika), 

 between October 1892 and February 1893 {W. H. Nutt). 



This exceedingly striking species has been named in 

 honour of the late Dr. W. A. Densham, Medical OfiBcer, 

 Sleeping Sickness Extended Investigations, Uganda, who 

 unfortunately lost his life at the end of May 1907, through 

 being charged by a wounded buffalo. Dr. Densham's 

 specimens, which were received barely two months before his 

 death, formed part of a small but interesting collection of 

 blood-sucking Diptera from Uganda, most carefully pinned, 

 in excellent condition, and accompanied by notes. Another 

 collection had previously been received from Dr. Densham, 

 and there can be no doubt that, had it not been for his 

 untimely death, our knowledge of the blood-sucking flies of 

 one of the newest dependencies of the British Crown would 

 have been largely augmented by the efforts of this pains- 

 taking investigator. 



Dr. Densham's field-note on this species is as follows : — 

 '' I saw this fly for the first time in January 1907, halfway 

 between Masindi and the Murchison Falls. In its flight and 

 manner of alighting it resembles Fly no. 4 [Tabanus tmiiola, 

 Pal. de Beauv.], and I overlooked the first that appeared. 

 I found it in several camps in the neighbourhood, but its 

 distribution seems very local. The natives say that it is at 



