H2: Femur with dark mark in otherwise pale femur, body segments plain
no other decerning differences
R. germanica generally larger than R semicolorata
H3: dark lines and dots on yellowish background of each segment underside
H4: Sub-imagino forewings greyish yellow, plain unmarked forwings
H4: Forewing mottled, some black cross veins
H4: Black borders to all cross veins
H6:1st segment of foot is same as 2nd
H7: upto 3 black dots above middle leg, none above hind
H7: flesh coloured rings on femor of front leg + black dot above hind leg
H8:Body creamy brown colour, chestnut marks on upper surface. Yellowish legs with brown stripe from body onto femur.
H8:Legs and body are uniformly dark brown
B7: Only 2 veins on hindwing 2nd of which is forked
B7: 3rd vien running along lower edge of wing
B8: 2 small open circles on upper side of body segment
B8: Orange eyes (male only) females no difference
B8: Yellow eyes (male only) females no difference
B8:
Sub-imagines are almost inseperable
Imagines can be seperated by small differences in genitalia
S2: Femur unbanded
last body segment without pointed spines
S2: Femur unbanded
​last body segment flatterned to form pointed spines
Large flies with 3 tails
Large hindwings. Forewing size 15-25mm
L3: forewing length is less than 10mm
Overall colour of sub-imago wing is dark grey, imago wings clear
L3: forewing length is less than 10mm
​Overall colour of sub-imago wing is pale grey, imago wings smoky brown
L3: forewing length greater than 10mm
L4: Hind tibia slightly longer than hind femur
L4: Hind tibia slightly shorter than hind femur
Use body markings to
separate species
Faint pattern of lines and dots on underside of body
​Imago overall reddish in colour