13 4. SYRPHIDE. 
the first, with a thin black arista; second joint about one-third as 
long as the first. Thorax entirely dull black, punctate, with short 
yellowish pubescence ; hind part of the pleura moderately shining, 
and exhibiting a series of narrow furrows; scutellum small, semi- 
circular, punctate, and pubescent like the thorax. Squamulz white, 
with short white fringes; halteres pale vellowish. Abdomen in- 
cluding the ventral surface entirely of a pale tawny colour, finely 
punctate and dull; its pubescence is very short and yellowish ; 
genitalia of the male and ovipositor of the female of the same colour 
as the abdomen; first segment slightly infuscated below the 
scutellum, second segment short, third twice as long as the second, 
fourth two and a half times as long as the third. fifth in the female 
as long as the fourth; the sutures are obliterated towards the 
middle, the oblique stripes of white dust on the sides are not very 
noticeable, and in the female are almost wanting. Legs entirely 
ochraceous, bare, and dull, only the cox are black ; claws black, 
pale at the base. Wings gr evish hyaline, with black veins, which 
have broad dark borders; venation normal. 
Type 3 , a single specimen from Uganda Protectorate, Northern 
Buddn, ¢ 3,800 ft., 16-18. ix. 1911 (8S. A. Neave); type 2, a single 
specunen from Uganda Protectorate, between Jinja and Busia or 
M'bwago’s, E. Busoga (“some forest”) 3,800—4,000 ft., 28. vi1.— 
1 vill. 1911 (same collectcr). 
’ 
Grove VI. (villosus, sp. n.). 
This group is limited at present to a single species, which, how- 
ever, is distinguished from any other by the very remarkable 
structure of the antenne. The antenne are also carried in a 
different manner; instead of being pendulous they are erect and 
curve outwards, as in certain Laphviine or in Callicera. The 
second antennal joint is rudimentary ; the first is rather short; the 
arista is normal. The head and thorax are clothed with rather 
long hair; the secutellum is not armed with spines; the ocelli are 
wide apart; the venation is entirely normal. 
The brcad head of the male, the structure of the antennie, and 
the way in which these organs are carried give to this species a 
very singular facies. and I was at. first melined to erect a special 
genus for it. But I think it better to include it for the present 
in Mrerodon, s.\., on account of the fact that, apart from the head, 
it shows no structural differences, and that the cephalic characters 
are also indicated in other species—tor example, the North-American 
M. pachystylum, Will., which has a very broad frons in the male 
anda third antennal joint two and a half times as long as the first, 
but the third joint is not erect and is pendulous as usual. — In 
the Javanese MW. vespiformis, de Meij., the third antennal joint 1s 
nearly three times as long as the first, but is pendulous, and the 
second joint is short but w “ell developed. 
