358 Bulletin de la Société Royale Ëntomologigue d'Égypte 
are pale yellowish; frons convex, triangular; face 
short, slightly convex; the whole of the vertex, frons 
and face are covered with a fine brownish-yellow to 
white pulverulence which is less dense on the vertex, 
and a very pale yellowish and scattered pubescence 
which is denser and darker behind the vertex, on the 
occipital border. This pubescence extends on the cheeks 
and below the head where it is usually very dark grey, 
almost blackish (while in N. aegyptiaca Wied. it is 
never more than pale yellowish). Proboscis and palpi 
black, the former being about as long as the abdo¬ 
men. Eyes bare, elongated; antennae with the two 
basal joints often dark reddish-brown but sometimes 
blackish like the more elongated and pointed third 
joint and the two basal joints of the style; the third 
and longest style-joint is swollen at the apex, blackish 
in its basal half and reddish-yellow in its apical half 
and the very short and minute apical joint of the style 
is blackish. 
Thorax entirely black and rather shining; the pu¬ 
bescence on the disc is from greyish to brownish- 
yellow, often as in N. aegyptiaca , Wied. but on the 
pleurae and underside of the thorax it is usually 
blackish or at least dark grey and much denser, lon¬ 
ger and more furry than on the disc; above the root 
of the wing there are some dark coloured bristly hairs; 
scutellum round, swollen, shining black, clothed with 
a pubescence which is similar to that of the thorax, 
reddish-yellow on the disc and greyish-black and lon¬ 
ger on the margins. 
Abdomen narrower than the thorax, entirely 
shining black and bearing a characteristic blackish 
