10 SYRPHIDE. 
33 (30) Eves equally hairy above and below 
(never spotted or banded), or with 
dark bands, which are formed by 
hair alone See" rg S- sition: ¢ 
34 (25) Marginal cell broadly open. 
55 (38) Hind femora simple, without a tooth- 
like process beneath at end; sub- 
apical cross-vein not recurrent, 
36 (87) Eyes bare ...... 5 hearth cor ortatn o foi 
37 (36) Eyes hairy ........ step t rart 
38 (85) Hind femora with a distinet tooth-like 
process ; subapical cross-vein recur- 
TENORS ico dle cibibls pd hom aookbotolns 
39 (22) Third vein not ‘kinked, or iy rarely with 
a slight undulation ; marginal cell 
open. 
40 (45) Second antennal joint short, as 
usual, 
41 (42) Face with a distinct tubercle; third 
vein with a deep kink; eyes of 
male widely separated ; hind femora 
thickened and spinose beneath .. ae 
42 (41) Face carinate or flat, without tubercle ; 
third vein straight or rarely undu- 
lating but not loop-like ; eyes of male 
usually touching. 
43 (44) Face carinate ; subapical cross-vein 
not recurrent and without appendi- 
culated angles; scutellum of ordinary 
size and not indented’. 0. i 27.00... 
44 (43) Face flat ; subapical cross-vein recur- 
rent and usually with appendiculated 
angles; scutellum of greater size and 
often, indented (7. SAO: : . «ts nepeeos 
45 (40) Second antennal joint enormously 
elongate, being the longest of all .. 
46 (1) Antenne long and porreet, very often 
longer than the head; if rarely they 
are short and pendulous, there is a 
stump on the third longitudinal vein 
down the middle of the subapical 
cell; there are never macrochete 
on thorax and scutellum. 
47 (52) Antenne with a dorsal arista and 
usually not placed on a long petiole ; 
small cross-vein before the middle 
of the discal cell. 
48 (49) Third vein without a stump; subapical 
cross-vein not recurrent ; thorax and 
abdomen always adorned with yellow 
MAUKINGS i. Cee RU Mectomte eysiens 
49 (48) Third vein with a stump; subapical 
cross-vein recurrent or at least per- 
pendicular; abdomen usually with- 
out yellow markings seutellum often 
spinose, ‘ 
Erisra cis, p. 92. 
HrbopuHius, p. 94. 
Ma tora, p. 98. 
Meropon, p. 100. 
CHAsMoMMA, p. 102. 
Syritta, p. 104. 
Eumrenvs, p. 108. 
AMPHOTERUS, p. 116. 
CurysoToxtM, p. 118. 
