MICRODON. eT 
each side; proboscis retracted. Thorax subquadrate, wholly black, 
dull owing to being strongly punctate, though shining on_ the 
pleuree beneath, with very short yellowish pubescence ; ‘seutellum 
semicircular, punctate like the thorax, but bare and somewhat 
shining, entirely red, with a simple, rounded hind border. Meta- 
notum shining black, wrinkled towards the middle above. Squamulze 
and halteres white. Abdomen elongate, with almost parallel sides, 
as broad as the thorax, but with the second segment a little dilated 
on each side, punctate and pubescent like the thorax; first segment 
black; second short, black in the middle, broadly red on the sides 
and narrowly red on the hind bcerder; it shows a_ sculpture 
reminiscent of that of Omegasyrphus, but much less developed ; 
third segment twice as long as the second, black, with the sides 
and hind border red ; fourth twice as long as the third, red, with 
two more or less brad black spots on the sides; genitalia red ; 
sometimes the second and third segments are wholly black, and 
the fourth has only the hind border black; belly black, with yellow 
hind borders to the first and second segments. Legs short and 
almost bare, red, with coxze and femora near the base black or dark 
brown ; first joint of hind tarsi strongly swollen, deep black like 
the following joints; claws red, with black tips. Wings greyish 
hyaline, ih an elongate triangular dark spot towards the tip ‘and 
on the costal border, formed by pubescence; veins strong and 
black, normal; subapical cross-vein strongly recurrent ; external 
lower corners of subapical and discal cells much rounded and 
without an appendix. 
Type 3, and two additional specimens from British East Africa, 
M’bagori’s Village, edge of Kenia Forest, 5,000 feet, 12.11.1911 
CE a Anderson). 
Grove V. (inermis, Loew). 
This seems to be the most numerous and characteristic group of 
Microdon in the Ethiopian region. ‘To it belong the larger and 
more strikingly coloured species, some of which are very strange 
and beautiful flies. 
The characters of the group are: Body and legs almost bare, 
lightly punctate; ocelli in contact with each other and forming a 
tubercle ; antenne elongate, the third joint sometimes as long as 
the first ; frons and face very broad, the face not narrowed below ; 
abdomen broader than the thorax at the base, attenuate behind, 
conical rather than cylindrical in shape, the second segment simple 
(with one exception ) and the fourth segment in the male greatly 
elongate, usually four or five times as long as the third; first joint 
of hind tarsi not or very little swollen. 
Of the present group three species have already been described, 
viz. inermis, ethiopicus, and erythros, all of which I have included 
in the following table, although the two last are not represented 
in the collection :— 
