Mar. igoo.l DYAR : On LaKV^ OF THE GeNUS ArCTIA. 45 



the markings are the same, except that the lines are niore broken up. 

 The form comes from the rainy coast region of the Northwest. We 

 have specimens from Easton, Washington, with a blown larva. This 

 is black, dotted with pale, a white dorsal line broken into three small 

 spots on each segment ; hair mostly brown, even well up on the back, 

 short, bristly. 



Gcnetira Streck. is referred here as a synonym, but it has the full 

 banding, the bands rather narrow, and differs from the nevadenis form 

 in that the secondaries have larger spottings. The thorax is lined. 

 Jt comes from Colorado. 



19. ]Villiamsii\% again the variety with defeniii na fa ^ewm. as the 

 stem form, but the varietal name has priority. The form is distributed 

 with nevadeiisis, but mostly in the higher altitudes or northern parts of 

 its range. The black color of the wings has turned to a faded brown, 

 except centrally, and the transverse bands are reduced, beginning at 

 the base, to two, or but one, beside the W-mark. The secondaries 

 are often considerably blackened. This may be the high altitude 

 nevadensis, just as superba may be the rainy region form of the same 

 species. The larvae are not known. 



20. Favorita is a curious blurred form ; otherwise it is nothing but 

 phyllira. I suspect that this is only phyliira migrated to the Rocky 

 Mountain region. I have seen very similar specimens from Grand 

 Papids, Michigan. The larva is not known. 



21. Cerviiwides is not known to me by any specimens other than 

 Strecker's types. It is a high altitude form, coming from Colorado. 

 Professor Smith says " this will prove an undersized //y///;v7 with black 

 secondaries, ' ' but he might as well have said an undersized williamsii 

 or a race oi quenselii, •since to modify //y/Z/rrt; in this way would be to 

 make another species of it. J suspect that this form is Dr. Packard's 

 " quenselii'''' of the Hay den Reports. It is in any case a form modi- 

 fied by cold ; but its relations must be left till further investigations. 

 The larva is not known. 



22. Blakci (^ihdanderiy^ is a small species with brown (not 

 black) fore wings and yellow hind wings, marked like detenninata, or 

 with even more bands. It comes from the arid region and is prob- 

 ably widely spread in the colder parts of this region. The type of 



*After examining. Grote and Robinson's type in the Academy of Nat. Sciences at 

 Philadelphia, I find hlakei is what I had previously called bolanderi and not neva- 

 densis. 



