1949] 
Hull — Syrphid Flies 
125 
men: black and largely shining, the first segment is chiefly 
opaque grey, the second is opaque black on the anterior 
and posterior margins and these fascia are joined in the 
middle. Third segment with a moderately large, opaque, 
black triangle resting on the base of the segment in the 
middle and connected to a wide, black, posterior fascia 
which occupies fully one half the length of the segment. 
Fourth segment with a minute, basal, medial triangle 
narrowly connected to the wide, black, posterior fascia. 
Hypopygium entirely shining. Posterior margins of 
second, third and fourth segments quite narrowly brown- 
ish yellow. 
Holotype: male, Nova Teutonia, collected by Fritz 
Plaumann. Jan. to April, 1948. 
Mallota intermedia n. sp. 
An aberrant species covered with light reddish brown 
pile upon the thorax and abdomen. Abdomen shining 
black, slightly metallic. Mesonotum brownish orange 
pollinose with obscure darker vittse. Length 12 mm. 
Female. Head : the face, cheeks and front are shining 
black, the face has a band of sparse, greyish white pile 
rather narrowly encircling the low tubercle and then pro- 
ceeding upward to the antennae. There is a narrow, 
wedge-shaped triangle of similar pubescence proceeding 
from the eye margin opposite the antennae towards the 
base of the antennae. The lower eye margins are also 
bordered narrowly with similar pollen, which does not 
extend upward upon the front. However, most of the 
frontal eye margins are narrowly bordered with brown- 
ish yellow pollen and the upper third of the front is 
broadly dark brown pollinose ; the lower part of the front 
is shining black and the vertex is shining black. The 
pile of the face is long, rather abundant and white. The 
frontal pile is long and black and white intermixed with 
a few yellow hairs along the eye margins and in front 
of the ocelli. The occipital pile is yellowish above with 
a few black hairs anteriorly along the eye margin. The 
occipital pile becomes almost white ventrally. The first 
