TACHINIDAE OF AUSTRALIA 195 
humeral callus humerals 









posthumerals 
notopleurals 
prescutum 
notopleuron 
presutural 
seta 
pre-alar 
seta 
transverse 
Suture 4 
supra-alars 
scutum F 
intra-alars 
postalars 
postalar callus dorsocentrals 
4 acrostichals 
basal 
lateral 
discal 

subapical 
ie 
Fics 4-6. Terminology of thoracic dorsum in Tachinidae. 4, dorsum of thorax, scutellum 
omitted, with a complete arrangement of chaetotaxy indicated schematically on one 
side only. 5 & 6, two typical shapes of scutellum and terminology of scutellar bristling; 
the straight lines connecting basal and subapical setae illustrate important differences 
in proportion. 
subapical 
6 RWC 
