404 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3 d. Ser. 



nor of Mr. Kirby's description, possesses these brown 

 spots, but the facts just stated show that their presence or 

 absence can not constitute a specific character. How does 

 the case stand as regards the number of cells in the sub- 

 triangular space ? Fourteen males from Cuba, in the 

 Museum of Comparative Zoology at Cambridge and in the 

 Collection of the American Entomological Society in Phil- 

 adelphia, whose yellow wings are unspotted with brown, 

 vary as follows: four have the subtriangular space free in 

 both front wings, five have it free in one front wing and 

 of two cells in the other, five have it of two cells in 

 both front wings. Therefore, neither the number of cells 

 in the subtriangular space, nor the presence or absence of a 

 brown spot on the wings separates domitia, male, from tenui- 

 cincta, and until some other character is discovered which 

 is distinctive, the latter name must be a synonym of the 

 former. Since tenera is the female of tenuicincta, it, too, 

 must consequently be a synonym of domitia. What the 

 neurational variations of the females may be I am unable to 

 state, as very few West Indian females exist in the collec- 

 tions above mentioned. The females from the United 

 States, like the males, usually have the subtriangular spaces 

 free, but one female not otherwise distinguishable has them 

 two-celled. 



4. This absence of females from the West Indies pre- 

 vents an expression of opinion on -pocahontas Kirby and 

 mooma Kirby, but it is difficult to see that the wing mark- 

 ings, which are the chief distinctive features, differ more 

 from those of "tenera," than do extreme individuals of 

 "tenera" from each other. 



5. Intensa Kirby from Mexico, described from the male 

 only, has no brown spots on the (almost) uniformly brown- 

 ish yellow wings, front wings with the triangle three-celled, 

 subtriangular space three-celled and at least three post- 

 triangular rows; triangle on the hind wing two-celled. 



6. The present specimens from Tepic closely resemble 

 the "tenuicincta" and "tenera" of the United States. The 



