414 ADDENDA. 



species and the two species of Megathymus belong to 

 another family, Castniidse, and that they are not butter- 

 flies, but moths. The species of both Megathymus and 

 Castnia are borers in their larva state in the roots of 

 certain Liliaceous and other related plants, and if we 

 retain the species of Megathymus in the butterflies we 

 must place the species of Castnia there also. The in- 

 sects from which this description was taken were bred 

 from the roots of an Orchis (Lcelia Majalis) in a green- 

 house in Albany, N. Y. 



3b 



