174 THE CANADIAN ENTOMOLOGIST. 



shown,* and my statement has been copied by later Entomologists, that 

 in some specimens of our species the band shows blue scales on the 

 edges, evidently a trace of a former greater resemblance between the two, 

 on the under surface yet very similar species. 



The second element in our Moth fauna is that which is South Ameri- 

 can or intertropical in its character. In the Hawk Moths such genera as 

 Aellopos, Enyo, Cautet/iia, Phila^npelus., must be reckoned as such, while 

 in this category we must distinguish between those forms of recent and 

 partial or more ancient and entire acclimatization in the United States and 

 Canada. As coming under the latter head we may reckon the genera 

 Citheronia and Eacles among our larger Moths which enjoy a much 

 greater representation in species in Mexico and South America. 



The final element of peculiarly North American genera is a large one 

 and in every family of Moths has abundant representation. In the Hawk 

 Moths Arctojiotiis, Lepisesia, Deidamia, Everyx and Cressonia are in- 

 stances ; both the Spinners and the Owlet Moths have numerous examples 

 of this category. 



(To be Continued.) 



A NEW PHYTOPTOCERIDIUM FROM NORTH AMERICA, ON 



ACHILLEA. 



BY DR. H. A. HAGEN, CAMBRIDGE, MASS. 



In the middle of September, 1886, Prof W. G. Farlow sent to me 

 several specimens of the heads of Achillea (probably A. millefoliu7n L.) 

 collected on Mt. Washington. They correspond well with the deformity 

 described by Dr. Fr. Thomas in Giebel's Zeitschr., 1872, vol. 39, p. 464, 

 on A. moschata Wulf. The flowers are to a large part changed in white 

 hairy sacs or galls, containing a number of living Phytoptas, As far as 



* In the Canadian Entomologist, vol. vii., p. 186; also Ann. Lye. Nat. Hist. 

 N. v., xi., p. 301, 1876, where I show that certain writers are at fault in considering 

 the variation in the color of primaries in this prominent species as sexual, the whitest 

 examples being given as the males ; consult also an article in the CANADIAN Ento- 

 mologist entitled : *' On Species of Catocala," pp. 229-232. 



