MICRODON. 2S 
clothed with hair. The frons of the male is very narrow, and in 
both sexes frons and face are comparatively narrow, the face being 
constricted below. There is a rather pronounced sexual dimor- 
phism, the female being usually of larger size and differently 
coloured. 
Some Oriental species also seem to belong to this group, e. g. 
stimplicicor Nis, de Meijere, from Java, and grageti, limbinervis, 
and nove-quinee, de Meij., from New Guinea. 
The collection includes specimens of the following species : — 
1(2) Femora black, narrowly yellow at the end 
alone; the female with deep blue body and 
strongly infuscated wings; abdomen of 
the male more or less yellow at the base 
Giallo Orcatins ante anyhoo er Bie tik iamicren erent brevicornis, Loew. 
2 (1) Femora yellow, more or less black above 
towards the base; the female with zneous, 
slightly bluish body, and not infuscated 
wings ; abdomen of the male almost entirely 
Vallone ba? th ft Saks Quad optae ss oo ties wen . estacerss Walls. 
130. Microdon brevicornis, Loew (1858). 
A well-known species, originally described from Caffraria, and 
subsequently recorded from Assinie and Belgian Congo in West 
Africa, and from Usambara and Kilimandjaro in E aa Africa. 
The male, which is very different from the female, has ik ae been 
described by Prof. Hervé-Bazin in Rev. Zool. Afric. iii. p- LOO 
(1913). 
Two males from Obuasi, Ashanti, W. Africa, 12 & 14. vi. 1907, 
“caught on leaf” and ‘on stick on damp path” (Dr. W. M. 
Graham): a female from same locality and collector, 15. vi., 
“caught in bush”; two females from Freetown, Sierra Leone, 
W. Africa, 21. viii. and 12. ix. 1899 (H. H. Austen). 
131. Microdon testaceus, Walker (1857). 
A stout rounded species, in the male sex closely resembling the 
preceding, but distinguished by the different coloration of thd legs 
and by the very different appearance of the female. 
The specimens before me answer well enough to the short 
description of Walker, and it seems advisable here to characterise 
the species more in detail. 
3. Length of the body 7 mm. 
Head nearly spherical, of a shining green zneous colour ; occiput 
concave, grey-dusted ; frons relatively very narrow, ele inner 
margins of the eyes ‘angulate and converging a little before the 
middle of the frons, which at the same point exhibits a deep 
transverse furrow; hair on frons and occiput rather long, dark 
grey: ocelli widely distant from the vertex, situate almost in the 
middle of the frons. adjacent to each other, but not in contact ; 
