J.
Wing morphology 1.
Wing coupling
mechanisms.
![](images/Sthule-g.jpg) |
Jugum, indicated by arrow, on fw of Hepialus thule
overlapping hindwing. |
![](images/Dryocampa%20humeral%20lobe-arrow-g.jpg) |
Humeral lobe, indicated by arrow, on hindwing of Dryocampa
rubicunda. |
![](images/f-clandestina-g.jpg) |
Frenular bristles from the base of the hindwing, held in
place by a retinaculum,
stiffened scales on the ventral forewing of Spaelotis clandestina. |
|