CALYPTKATES. 
619 
Wings sometimes clouded. Mostly shiny black 
or yellow flies. Head broad; 1 or 2 fronto- 
orbitals. Anal cell rounded 
Wings nearly always spotted or marked. Only 
upper fronto-orbitals, and no preapical bristle. 
Ovipositor horny. Anal cell generally more or 
less pointed 
Wings often marked or spotted. Fronto-orbital 
sometimes present. Preapical present. Ovi¬ 
positor not horny. 2nd antennal joint gen¬ 
erally long. Frequent damp places 
2. Vibrissae present. 
Small flies with rather long bodies, the anterior 
and posterior cross-veins quite near together, 
R, not reaching to the middle of the wing 
Costa with short hairs and long bristles, tibia± 
with spurs and preapical bristles 
Generally bristly grey or blackish flies, often 
predaceous and found about excrement or 
near water. Abdomen a little elongated, 
having at least 5 visible segments. No costal 
spine. Lower squama small, often not visible 
from above. Male & female eyes wide apart 
Blackish, grey, or brownish flower-flies with 
abdomen of not more than 4 or 5 visible 
segments. The lower squama large as a rule, 
rarely hidden by the upper. Male eyes gen¬ 
erally closer than female; arista variable 
CALYPTRATES 
Arista almost always with hairs along its whole 
length at least on one side, basal part of 
abdomen not bristly 
Arista bare on the distal and hairy on the basal 
part; basal part of abdomen rarely bristly . . 
Arista bare along its whole length, abdomen 
often very bristly 
Sapromyzids. 
Ortalids. 
Sciomyzids. 
Heteroneurids. 
Helomyzids. 
Cordylurids. 
Anthomyiids. 
Muscids. 
Sarcophagids. 
Tachinids. 
