On North- American Insects. 11 



quently owed their arrangement to the scales, the scales 

 degenerated. In isolated cases only did thej persist in a 

 s])ecialized form over the greater portion of the body (Manidge, 

 Dasypodidffi), otherwise usually upon the tail alone, and fre- 

 quently also upon the extremities. Generally, however, they 

 are already much reduced in the last-named region, and in 

 the case of the majority of Mammals every trace of scales 

 has disappeared. 13ut very commonly the arrangement of the 

 hairs has still remained, as though they yet stood behind 

 scales. In this manner the hairs also point to the former 

 presence of scales. 



Contrary to my desire, this paper has assumed the appear- 

 ance of a polemical character towards Homer's memoir. It 

 seemed to me, however, to be of importance that now, when 

 it is to be hoped that still further studies in a similar sense to 

 that of Komer will advance the questions here touched u])on, 

 the different views should be accurately expressed and their 

 mutual limits defined. By this means we shall attain a 

 precise idea of the question at issue, which cannot fail to be 

 advantageous. 



Amsterdam, March 13, 1893. 



II, — List of Insects collected hy Miss Elizabeth Taylor in 

 Western North America in the Summer of 1892. By 

 Arthur G. Butler, F.L.S., F.Z.S., &c., and W. F. 

 KiRBY, F.L.S., F.E.S., &c. 



LEPIDOPTEKA. By A. G. Butler. 



Most of the species recorded in the following list were 

 obtained on the Slave liiver in the months of June and July. 

 The collection is of interest as extending our knowledge of 

 the range of species hitherto received from the Rocky 

 Mountains, California, &c. Two species are described as new 

 to science. 



Of Butterflies twenty-three species arc in the collection, 

 of which ten belong to the Nymphalidte, four to the Lyctenid*, 

 six to the Papilionida3, and three to tiie llesperiidaj. 



1. Anosia i)lexippus. 

 Papilio plexippus, Linnaeus, Mus. Lud. Ulr. p. 262 (1764). 

 ? . Winnipeg, Manitoba, 11th September. 



