126 SYRPHID®. 
extremity of the very elongate third segment, as also the genitalia, 
of a dark red colour ; legs entirely red, only the hind tarsi being 
blackish. 
There is a female from Durban ( #. Muzs), which has an entirely 
black head and a black second antennal joint; thorax and scutellum 
wholly black; abdomen black, with the third and fourth segments 
red on the base and at the tip; hind legs almost entirely black, as 
described by Wiedemann. 
Length of body 14 mm., while Wiedemann gives only 7 mm. 
134. Microdon rugosus, sp. n. 
3. Length of body 8 to 9 mm. 
Very near the preceding species, but smaller and slender in shape, 
with entirely red antennze and hyaline wings. The size of the 
present species corresponds better to that given by Wiedemann for 
punctulatus, but the antenn and wings are different. 

Fig. 21.—Microdon rugosus, sp.n. G. xX 6. 
Head black, strongly wrinkled, covered with short and sparse 
whitish pubescence, which does not conceal the ground-colour of 
the face; the frons, as far as the transverse furrow, and the upper 
border of the occiput near the vertex are red; the ocellar triangle 
and an area surrounding it are black and shining, the ocelli are 
very close together; eyes shining dark brown, with facets of equal 
size, rather near toge ther in the middle of the frons owing to their 
prominent angles; antenne rather long, entirely dark red, the 
first joint bare and thin, as long as the two following joints taken 
together; third joint oval, attenuated at the tip, with a ver vy short 
but not thick reddish arista; face gently convex, not constricted 
below; opening of buceal cavity small; jowls with a small pit on 
