9 
2 (13) 
3 (4) 
4 (3) 
5 (12) 
6 (7) 
7 (6) 
8 (9) 
9 (3) 
11 
(11) 
(10) 
SYRPHIDS. 
the tips of the auxiliary and the first vein ; 
subapical cross-vein not bent towards its 
middle and with no stump at that point; first 
antennal joint more or less elongate, almost 
exceeding the second in length. 
Third antennal joint bare, ae, or less elongate ; 
arista developed as usual; face without. fur- 
rows, or these only slightly developed, 
Aen narrow and stalked, the second seg- 
ment being very much cdusericted towards its 
middle, and there much narrower than the 
thorax; thorax and legs bare; scutellum with 
two spines 
se eee eee CU le ea se 
Abdomen not stalked, m: nostly very , broad, ‘nd at 
least as broad as ae thorax. 
Third antennal jeint as long as or shorter than 
the first, pendulous ; second joint well de- 
veloped, sometimes almost as long as the 
third: eyes of male with a prominent angle 
in the middle of the frons, slightly convergent ; 
thorax and head with a very short pilosity. 
Antenne very short and thick, the third joint 
ovate, as long as the first; smallish, short 
species, with almost rounded abdomen ; 
scutellum deeply emarginate at end; ocelli 
distant; legs and thorax rather pilose 
Antenne of the ordinary length, the third joint 
shorter than the first, whic th is usually thin. 
Seutellum with strong spines; ocelli distant ; 
legs and thorax pilose ; short, rounded, 
geneous species, very much resembling the 
Kuropean ones .. 
Scutellum rounded, without. spines, neither 
dentate nor emarginate; ocelli in contact 
with each other, forming a single tubercle ; 
lees bare ; rather elongate species, usually of 
considerable size, and “often very striking in 
coloration. 
Body almost cylindrical, brown and blackish 
coloured, very strongly punctate; third 
antennal joint rather short t; second abdominal 
segment depressed in the middle and produced 
ou each side; first joint of hind tarsi greatly 
swollen ... 
Cee let cl 09) ¢ Sep eueire loiie te io nem tet ecw 
Body not cylindrical, thie ahdomen being usually 
broader than the thorax even if elongate, its 
second segment not produced on each side or 
only very rarely ; punctuation slighter and 
coloration more striking ; first joint of hind 
tarsi not or not so much swollen; third 
antennal joint usually elongate 
g (ee) 0 0) eay nile ove 
Third antennal joint enormously elongate, erect, 
4 to 5 times as long as the first ; second joint 
very short, almost rudimentary ; eyes of male 
with scarcely any trace of a prominent angle 
ond very widely separate; ocelli distant ; 
thorax head, a and legs clothed with long hair. 
GrevpP I. 
Grovp II. 
Group IIL. 
Grote LV. 
Group V. 
Grovr VI. 
