— gi — 



Wings of Frenate Moths. — Specimens of moths belong- 

 ing to the family Nociuidcc will be furnished as illustrations 

 of I^epidoptera in which the frenulum is well developed. 

 Two specimens, a male and a female of the same species, 

 will be given the student. 



Remove the wings of the right side of the female, and 

 bleach and mount them. 



Figure and describe these wings. 



Remove the wings of the right side of the male, and 

 bleach and mount them. 



Figure and describe these wings. 



Describe the secondary sexual distinction exhibited by the 

 wings of this species. 



How could one of these types have been derived from the 

 other ? 



Study the wings of the male that have not been bleached 

 and note the frenulum hook on the fore wing, which receives 

 the tip of the frenulum. It may be necessary to remove 

 some of the hairs from the base of the wing. Use a small 

 sable brush for this. 



Study the unbleached wings of the female and note the 

 absence of a frenulum hook. 



Compare the hind wing of the monarch butterfly with the 

 hind wings of these moths and discuss the differences 

 between them. 



