1949] 
Hull — Syrphid Flies 
121 
suture there is a broad band of opaque black followed by 
a wider band of shining bluish black. In front of the 
scutellum there is a medially rounded, transverse band 
of opaque black extending forward at the postcalli to in- 
clude all of these structures. The pile of the postcalli 
is entirely black. The scutellum is clear, opaque yellow 
with the declivitous portion of the base and narrow lat- 
eral basal triangles black. The pleural pile is white but 
black on the pteropleura. Squamae white on the outer 
lateral basal corners, the remainder black or dark brown 
with blackish border and fringe. Legs: black, the basal 
third of the anterior and middle tibiae dark sepia brown 
but only when viewed anteriorly or posteriorly. Hind 
femora and tibiae polished black, the former considerably 
thickened, especially in the middle, the latter with a low, 
short, apical, angular production. Tarsi black. Wings: 
not quite hyaline basally; they are heavily but diffusely 
tinged with dark brown beginning just before the end 
of the second basal cell and the beginning of the submar- 
ginal cell. The deep brown color extends a little beyond 
the anterior cross vein and includes the stigmal area. 
Remaining apical half of wing pale brownish grey, partly 
due to the thick villi. Abdomen: shining black; very 
faintly bluish. There is a large, medial, posterior, hol- 
low-sided triangle on the apex of the second segment 
which in the middle extends broadly to the base of the 
segment but quite narrowly to the posterior corners. 
Third segment with a posterior, biconvex, medially 
notched, opaque band. Fourth segment similar, the 
band less convex and the medial notch minute. Fifth 
segment with a small, oval basal black spot on either side, 
the remainder shining. Abdomen elongate and charac- 
teristic of the species of the scutellaris group. 
Holotype: Female, Nova Teutonia, Brazil, Fritz Plau- 
mann. Jan. to April, 1948. 
Eristalis cora n. sp. 
A dull obscure species with opaque rusty brown scu- 
tellum. Distantly related to obsoleta Bigot. Length 10 
mm. 
