GRAPTA II. 



Body fuscous above, dark gray with a brown tint below ; legs and palpi gray ; 

 antenna' fuscous above, annulated with gray below ; club black, tip yellow. 



Female. — Expands 1.8 inch. 



Upper side paler, the yellow spots larger ; under side uniform brownish-gray ; 

 the markings nearly obsolete, the marginal lunations wanting ; the discal mark 

 scarcely distinguishable. 



Larva unknown. 



The only examples of Hylas thus far known to me have been taken in Col- 

 orado. Mr. T. L. Mead discovered the species in 1871, and since that time a 

 few individuals have appeared among the butterflies collected by Dr. Hay den's 

 expeditions. The information given of its habits is by Mr. Mead, which I repeat 

 from the notes on G. Zephjrus, Vol. I. of this w^ork. 



" On the 28th August (1871), on the South Park road, in the mountains, and 

 about twenty miles from the Park, I found a large smooth rock exposed to the 

 sun, on which were several Graptas, Zephyr us, and a species numbered 3 {Hylas). 

 On this rock, and in the immediate ^dcinity, I captured twenty Zep>}iyrus, and five 

 of the other. I had previously, on the 16th August, found both species together 

 in the vicinity of Berthoud's Pass, where fifteen of the smaller ones were taken 

 with a few Zephyrus, on a small patch of flowers high up the mountain. These 

 were the only occasions on which the small Grapta was seen. Zephyrus was 

 taken abundantly throughout the State wherever collections were made." To 

 this I add that I have received Zephyrus from various localities since 1871. The 

 expeditions under Lieutenant Wheeler have taken it both in Southern Utah and 

 in Arizona ; and, as stated by me in Vol. I., it has been received from Nevada, 

 California, and even from Fort Simpson, Mackenzie's River. 



Considering then that Zephyrus is so wide-spread a species and Hylas so 

 local an one, and that the two agree neither in size, shape, color, or otherwise, 

 except in group characters, there would not seem to.be much ground for a 

 suggestion of relationship between them. Yet Mr. Scudder, in his lately pub- 

 lished Synonymic List, treats the two as established dimorphic forms of one 

 species, which he calls Zejjhyrus, and renames Zejihyrus Edw. as Thiodamas 

 var., giving the other as Hylas var. No evidence of dimorphism is alleged to 

 have been discovered, nor does Mr. Scudder profess to know more of Hylas than 

 what I have stated above. It is enough to say that such a relationship would be 

 highly interesting if proven. That the two species were together in the few 

 instances in which Hylas was seen is nothing, for that is the rule wheVever any 

 two or more species of Grapta are found. Faunus, Comma, and Progne con- 

 stantly associate. 



