MICRODOX. 133 



developed ; hair on thorax, scutellum, and pleursB entirely black ; 

 alar squamula black-fringed like the thoracic ; abdomen darkened 

 towards the middle of the fourth and fifth segments, the sutures of 

 the third, fourth, and fifth segments almost obliterated in the middle ; 

 legs as in the male ; wings more blackened in mature specimens. 



Type , a single specimen from British East Africa, Yala River, 

 southern edge of Kakumega Forest, 4,800-5,300 ft., 21-28. v. 1911 

 (S. A. Neai-e) ; tt/pe $ , from Uganda Protectorate, Mount Kokan- 

 jero, S.W. of Elgon, 6,400 ft., 7-9. via. 1911 (S. A. Neave); an 

 additional female specimen from Uganda, Western Ankole, 4,500- 

 5,000 ft., "in forest," 12-14. x. 1911 (S. A. Neave). 



138. Microdon inermis, Loew. 



A black species, with bkck wings and dark red abdomen and 

 legs. 



I assume this specimen to belong to Loew's species, since it corre- 

 sponds exactly to the description ; the stump on the third vein is 

 not wanting, as stated by Prof. Herve-Bazin (Rev. Zoolog. Afric. 

 iii. 1913, p. 98), but is long and well developed, as in the allied 

 species. Pubescence very short ; basal joints of the antennae bare ; 

 ocelli close together. Loew's description was based on a male from 

 Caffraria, and Herve-Bazin has described a female from Katanga. 

 The female is like the male ; the frons and face are very broad, the 

 the latter with well-defined furrows running from the base of the 

 antennae to the jowls ; sutures between the last abdominal segments 

 obliterated towards the middle ; halteres whitish yellow, not reddish 

 as in the male ; wings blue-black. There is no difference between 

 the sexes in the colour of the pubescence on the head, thorax, and 

 scutellum. 



A male specimen from British East Africa, 13 miles north of 

 M'ba^ori's Village, towards Meru, 13. ii. 1911 (T. J. Anderson) ; a 

 female from M bagori's Village, edge of Kenia Forest, 5,000 ft., 

 12. ii. 1911 (same collect or). 



139. Microdon pallidus, sp. n. 



c? $ . Length of body 10-12 mm., of antenna 4 inm. 



Very like the preceding species, but distinguished by its smaller 

 size and the paler coloration of the abdomen, legs, and wings. 



The two sexes are alike in coloration. 



Head bkck, punctate, and dull, with very short yellowish pubes- 

 cence ; frons of the male contracted below the middle, and with a 

 deep transverse groove connecting the inner angles of the eyes ; 

 frons of the female broad, and with a less distinct transverse groove; 

 ocelli fairly close together ; face without the distinct furrows seen 

 in the preceding species ; occipital border in the female, from the 

 vertex to the jowls, of a dark reddish colour ; head below clothed 

 with long erect white hair ; antennae long, the first and the second 

 segments clothed with short black hair; third joint shorter than 



