FAM. EMPIDIDZE 249 
SYNOPSIS OF THE GENERA OF THE HEMERODROMIINJE 
I. Style shorier than the third antennal joint; proboscis usually 
inflexed and. pointed; no discal macrochete, metapleure bare, 
mesosternum but litile concave; fygidium. lerminal and more or 
less evect ; ovipositor chitinised and sometimes froduced ; third 
vein forked, anal cell, when present, broader towards apex, the 
crossvein straight, basal cells more than. one-third the length of 
the wing, costa with very short hair$... .. . . . . . .. HEMERODROMI, S. latiss. 2. 
Arista more than twice as long as the third antenmal joint; 
proboscis nearly werlical; some discal macrochele present, 
metapleure with some setule, mesosternum more ov less concave; 
Bygidium veflexed over ihe abdomen ; ovipositor not produced 
and chitinized ; no spur at the eud of the front tibie ; lhird vein 
no forked, anal. cell with parallel sides, except in. Cephalo- 
dromia, and afpically vounded, basal cells small, less than 
one-third the length of ihe wing, the anal and second basal cells 
subequal in extent, costa hairy and usually with a basal brisle.  CHELIPODA, S. latiss. 9. 
2. Eyes more or less separated on face; anal cell, when present, much 
shorter than second basal, the anal crossvein. oblique; proboscis 
BUD UO PDRHOUEN DASHAT C CEU Ic Le Lue ud. el ca p sin 3s 
Eyes large, contiguous beneath antenne ; anal cell subequal to second 
basal, anal crvossvein perpendicular ; brothoracic and supra-alar 
bristles distinct ; discal cell emitting three veins... . . Genus DgvwopRowura, Becker. 
3. Humeral crossvein wanting, auxiliary vein. fusiug with ihe costa 
close to the base of ihe wing, first vein terminating before the 
middle of the wing, pedicel of ihe second amd third weins 
atrophied, aual cell imperfect ov wanting ; thorax quadrangular, 
without a depressed presculellav space; front short, face very 
Bayrou - (AP AVESSNÜCONHDHORS Loc Me ua pM EU D eC IC M. qe a gs 4« 
Humeval crossvein present, auxiliary vein well separated from the 
costa and. parallel with it, first vein tevminating at ov beyond 
ihe middle of the wing, pedicel of the second and third veins 
distinct though short, anal cell complete, the anal vein separated 
Jfvom the thichened hind margin; thorax with a distinct 
depressed  prescutellar space and with evident humeri; eyes 
Blainly sepavated on the face; sbyle very short; scutellum smaller 
Un 
"han ihe melanolum 20... . . 7. «. Genus CnerirERA, Macquart. 
4. Discal cell open outwardly, anal cell wanting, second posterior 
cell petiolate ; auxiliary vein a little bent, fused along its middle 
course and slightly separating from the costa at ils tib, bedicel of 
the second and third veins entirely atrophied ; hind margin of the 
wing scarcely thichened, the costa abruptly thinner beyond the 
fourth vein ; anal vein running into the. hind margin at its very 
v00l ; sculellum as large as and usually larger than the metano- 
lum ; humeri nol consiricted ; ovipositor usually short and conical ; 
