HELOPHILUS. 97 
Type 3 from Chintechi, Nyasaland (Dr. H. WS. Stannus), and 
an additional specimen from North Nyasa, Songwe River, 17. ix. 
1909 (Dr. J. B. Davey); type 2 and another specimen from N. 
of Mount Kenia, near Crater Lake, 5,700 ft., 15. ii.1911 (7. J. 
Anderson). 
101. H. (Mesembrius) africanus, Verrall (1898). 
A single female specimen from British East Africa, Makindu, 
3,300 ft., 5-7. iv. 1911 (S.A. Neave), which agrees very well with 
the description of this species from Aden, but also with that of 
senegalensis, Macq. 
102. H. (Mesembrius) ingratus, Loew (1858). 
A very distinct species, with entirely black legs. Front tarsi of 
the male short and broad, yellow; the first joint bears on the out- 
side a tuft of black hairs, which are like those of the tibiw; the 
last joint has two very distinct black rounded spots. Hind tibia 
with a prominent tubercle on the last third; hind tarsi black, the 
first joint rather swollen. 
The present species shows a great many characters of the genus 
Prionotomyia, Bigot, which is therefore probably synonymous 
with Mesembrius *. Two males from N.E. side of Lake Albert 
Edward, Uganda, 1906 (Dr. A, D. P. Hodges); a couple from 
Durban, 26. x. 1902 (#1. Muir); some additional specimens of both 
sexes from Uganda, various localities (Dr. R. van Someren). 
105. H. (Mesembrius) cyanipennis, sp. n. 
3 2. Length of the body 10-12 mm. 
A very distinct black species, with the abdomen mainly reddish and 
with infuscated wings, which have very strong bluisn reflexions. 
Head black, the frons with black, the occiput with yellowish, 
and the face with white, hair; face with a faint whitish pollen, 
the median black stripe being therefore indistinct; antenne 
entirely black, the third joint rounded; face with a distinct but 
not very prominent tubercle; eyes bare, unicolorous, in the male 
approximated but not touching; frons of female shining black, 
with an indistinct transverse greyish band in the middle. Thorax 
and scutellum entirely black, slightly shining, but the scutellum 
reddish along the hind border; the hair is short and grey, longer 
and paler on the pleure; the thorax shows no distinct stripes on 
the back, but two parallel rather distinct longitudinal furrows. 
Squamule pure white and with a white fringe; halteres yellowish. 
Abdomen of male more red than yellow; first segment black ; 

* Since this was written Dr. Speiser has shown that the synonymy hero 
suggested is correct. 
iL 
