IO. 
II. 
I2. 
FAM. EMPIDID/E 
. Hind femora setose beneath, but not armed, wilh spinose tubevcles.. 
Hind femora cy armed beneath with lubercles which bear spines ov 
strong sete, hind libie cy curved and tuberculate (Pl. 1, Fig. 6) . 
. Vein between ihe first aud. second. basal cells distinct, discal cell never 
much shorter than the second posterior cell. usually much longer ; tibie 
not clavate DHL OR Sc NUM ME Mua C CEN 
Vein between the first and secoud basal cells very weak, the first basal 
broader than the second, discal cell much shorter than the second pos- 
terior ; hind tibie usually clavate (Pl. 5, Fig. 39) . 
. Hind femora not thickened and entirely unarmed ; arista stiff and shorter 
than the broadly conical third joint ; first and second veins ending close 
io the tip of the wing; proboscis horizontally forrect and slender 
(PI. 5, Fig. 42) : 
Hind femora more or less thichened and. armed. beneath. with. spinous 
bristles; arista hair-like and much longer than the third joint of the 
antenne . 
. Third and fourth veins parallel or diverging ; eyes separated on the face; 
Broboscis slender, projecting, about as long as the head, falfi promi- 
nent ; mesonotum and pleure usually pollinose, the pubescence of the 
lhorax sparse, usually a pair each of dorsocenival and scutellav 
bristles ; usually no ovipositor ; hind. lavsi with minute black thorns 
beneath, hind femora not extraordinarily thickened (P]. 1, Fig. 5) 
Third and fourth veins somewhat convergent, the first posterior cell 
narrowed ; eyes contiguous or nearly so beneath the antenne in. both 
sexes ; no dorsocentral bristles ; last segments of Q abdomen lengthened 
forming an ovipositor . "ee PIU COMMA 
T hird joint of the antenna elongate ovate; tibie without tooth; broboscis 
projecting. forward; head. not. unusually small; hind femora often 
tuberculate and always greatly swollen s 
Third joint of the antenne semicircular, the convex side up; front tibie 
with a strong subbasal flexor tooth; froboscis perpendicular (abnor- 
mal ?) balpi small; shining metallic species with very small head 
Body covered with tomentum, disc of the mesonotum bave of file; 
jroboscis about as long as the head, slender for piercing, palpi 
elongate (Pl. 5, Fig. 45) . 20. 
Body shining, often metallic, devoid of tomentum, the mesonotum more 
or less densely filose; proboscis short, not constructed for piercing, the 
labelle when afpressed forming a compressed lamella, palpi short 
(Pl. !, Fig. 3) Pee. Coca AURI ME QOIS A ET 
Second and. third veins approximate and parallel, a heavy stigma present 
beyond: end. of. first vein, discal cell complete, anal cell longer than 
basals; thorax slightly arched, its bristles weak ( PI. 8, Fig. 86) 
Second and third veins diverging, no stigma, discal cell absent, anal 
cell shorter than basals; eyes of female widely sepavated ; thorax 
greally ayched, its bristles bronounced 
17 
Subgenus EricErA, Walker. 
Subgenus HanPAMERUS, Bigot. 
8. 
Genus SvyNpvas, Loew. 
Genus AcARTERUS, Loew. 
9. 
Genus Hvnos, Meigen. 
IO. 
II. 
Genus CEnRATHYBOS, Bezzi. 
Genus LacrisTroMvia, Melander. 
Genus Eunvz2os, Coquillett. 
Genus InoNowuYi4, White. 
Genus ScriApocEna, White. 
