ITD	Intertegular distance
HW	Head width
FL	Flagellum length
FTW	Fore tibia width
MOC	Median ocellus
EW	Eye width (frontal view)
EP	Eye perimeter (lateral view)
EA	Eye area; calculated as shown in the text
OD	Ommatidia density
SB1	Sensilla basiconica I
SB2	Sensilla basiconica II
SCo1	Sensilla coeloconica I
SCo2	Sensilla coeloconica II
SCa	Sensilla ampullacea
SP1	Sensilla placoidea I
SP2	Sensilla placoidea II
ST1	Sensilla trichoidea I
ST2	Sensilla trichoidea II
ST3	Sensilla trichoidea III
STS	Sensilla “tongue-shaped”