PAFILIO III., IV., V. 



yellow ; and that in tlie intervening zone both colors are fonnrl. Mr. Walsh was 

 nearly correct as to the northern limit. The most northern point on the sea- 

 board at which I have known GJaucus to be seen or taken was at Newburgh, on 

 the Hudson River, lat. 41° 30', — where I resided several years, — and then but 

 ii single example. 



Dr. Hay. of Racine. Wisconsin, writes me that he once took Glaucus in his 

 garden, and on another occasion saw one near the mouth of the Wisconsin River, 

 lat. 43°. And Mr. Brewer states (Can. Ent., IX., p. 20), that in Nebraska, as lar 

 north as the Niobrara River, the black and yellow forms of female are about 

 equal ; lat. 42^ 30'. 



Although Turntis has been so long known to naturalists and has been re- 

 peatedlv figured, this, I believe, is the first attempt to bring the two sexes of the 

 yellow form together. 



There has recently been some effort on the part of the adherents of a rigid 

 priority to change the name of this species to Glancus, that name having l>een 

 given to the black female in 1767, antedating by four years the name Twnus ap- 

 plied to tUe yellow male and female. One woidd think a century long enough 

 to confirm a name even if originally given in error, especially in case of any spe- 

 cies which had since been repeatedly figured and treated of in published worlds, 

 and that nothing but confusion coidd result from a change after this lapse of time. 

 But it happens in the present case that Gluucus is not the insect descril^ed as 

 Tiiriius, being but a dimorphic form of one sex only, entitled as such form to its 

 own special name. The species is 2\irnus, this form is GJaucus. 



Note. — From what I liave observed at Coall)iiv;;li, the present season (1S77), I think it pruliable tliat here, 

 and to the southwanl, there may often lie four annual broods of Turnus. instead of three, as st.ated above ; 

 the e.xistence of the fourth being- dependent on the weather in April. This month was pleasant and warm, 

 and different Papilios were exceedingly abundant; and, during the last week, the females of Turnus -were freely 

 depositing eggs. This would give ample time for the niatm-ing of the Iarv.-B and emergence of the butterflies 

 before the first of June, at which date the first of the three broods recorded had a beginning. I watched care- 

 fully for yellow females, and hiid a good opportunity as the butterflies gathered about the fruit trees and lilacs, 

 but I saw only four; while there must have been scores of the black form, if not hundreds. 



