71 



Expanse of wings : $ , 1.90 to 2 in. ; ? ? , 1.80 in. 



Described from 4 5 's and i $ fronn Indian River, Florida. 



This is the largest species known to us in the genus. It is 

 separable from N. Juvenalis and N. Propertius by its darker color, 

 less distinct ornamentation, less rounded wings, and absence of 

 the white spots of secondaries in cells 6 and 7. From N. Nmvius 

 with which it is associated, it is distinguished by its large size, 

 more distinct markings, and the contrasting lighter shade of the 

 palpi. 



The genitalia of this species resemble those given for N. 

 Horatius and N. Virgilius, named from their genital armature, by 

 Scudder and Burgess, but 1 am unable to refer it to either. 

 Examples from Florida, which Mr. Scudder has kindly permitted 

 me to examine, and labeled by him as N. Horatius, have the 

 white hyaline spots of the primaries larger than in the above 

 species, and, according to notes made at the time of their 

 examination, "larger than in any of the N. Juvenalis in my col- 

 lection, except in a single example taken at Center, in which 

 they are about the same in size and similar in form." 



NisoNiADES Propertius, Scudd.-Burg. 



Several years ago, through the kindness of Mr. Scudder, I 

 was permitted to examine the species of the Nisoniades in his 

 collection, including several of his types. Among them were 

 eight examples, bearing his label of Propertius, from the follow- 

 ing localities ; two from Mokiah Pass, Palmer collection ; one 

 from Sierra Nevada ; four from CaHfornia ; one from Juniper 

 Mountains. 



The following notes upon this species were made by me at 

 the time, upon comparison of the material with the examples of 

 N. Juvenals in my own collection. 



Size of N. Juvenalis ; the primaries more pointed; the sub- 

 marginal row of sagittate and black spots is more oblique, being 

 more drawn inwardly toward the base as it approaches the internal 

 margin, whence it follows that, while in Juvenalis, of the two 

 subelliptical whitish spots in cell i b, the lower one is as near to the 

 outer margin as that in cell 3 ; in this species it is always further 

 removed. The hyaline spot in the discal cell is smaller than in 

 N. Juvefialis and is much less conspicuous underneath. Of the 

 four costo-apical hyaline spots, I, 3 and 4 are in line, or 3 is 

 somewhat nearer to the base of the wing ; 2 is nearer the apex 

 and is elongated. The thorax and abdomen are fuscous, instead 

 of umber-brown. In general color it is darker, more approaching 

 N. Persius — the black spots not offering so strong a contrast with 

 the ground as in N. Juvetialis ; the primaries are nearly covered 

 with bluish hairs, which is perhaps the best characteristic feature 

 of the species. 



It is very doubtful if the genitalic form, N. Tibullus of Scudd.- 

 Burg., can be separated from N. Propertius. 



