N 
CLASS. ' 105 
VI. Order — DIPTERA. 
Wings two. 
GENERA . 
1 GENUS.—OESTRUS, GAD-FLY. 
Antenna taper growing from a fmall point or 
button. No mouth but 3 punctures, without trunk 
or beak. Stemmata 3. 
2. TIPULA, CRANE FLY. 
Head long. Palpi curved. Probofcis fhort, and 
bent inward. Upper jaw like an arch. 
3. MUSCA, FLY 
Antennae vary and mark the families. Mouth 
formed by a foft flefhy probofcis, with two lateral 
1 i ds. No palpi. 
" 4. TABANUS. 
Antennae conic, of 4fegments. Trunk flefhy, ter¬ 
minated by 2 lins. Palpi one on each fide of the trunk. 
5. CULEX, GNAT. 
Antennse of males feathered. Trunk a long 
•{lender fyphon, or flexible (heath, enclcAng fetas, or 
bridles, pointed like din^s. 
6. EMPIS. 
Probofcis of a drong horny fubdance, bivalve, long 
and bent inwards. 
7 . CONOPS. 
Trunk long, jointed. 
8. ASILUS. 
Rodrum hard, or horny, porre&ed, extended out 
its whole length, and bivalve. 
9. BOMBYLIUS, BUZZ-FLY. 
Trunk taper, very long, diarp, between two hori¬ 
zontal valves ; in which are contained dings s or 
bridles. 
10. HIPPQBOSCA, HORSE-LEECH. 
Antenna like a Angle hair. 
F.odrum bivalve, cylindrical, obtufe, and waver¬ 
ing or fhaking, as if ill Axed. Feet armed w T ith 
nails. Body flat, hard., and as it were icaly; hard to 
cruftu \ IL 
