196 Rk. W. CROSSKE 
transverse suture pteropleuron  pteropleural seta postalar wall 
notopleuron 
postalar 
scutum callus 
suprasquamal 
ridge 
prescutum scutellum 
humeral postscutellum 
callus 
mediotergite 
mesopleuron 
pleurotergite 
propleuron 
propleural seta 

prostigmatic seta 
posteroventral 
declivity of 
the thorax 
sternopleural setae barette 
sternopleuron hypopleuron 
N 
prosternum 
prosternal membrane 

edge of fore coxa 
8 9 RWG 
Fics 7-9. Thoracic characters of Tachinidae. 7, left lateral view of thorax with termin- 
ology of sclerites and setae (latter indicated by pore positions only), wing removed. 
8, unusual prostigmatic setae in the genus Pevibaea. 9, prothoracic region, drawn from 
specimen with setulose prosternum. 

