1914.] NATURAL SCIENCES OF PHILADELPHIA. 173 



"caiight 15 or 16 (at flowers of Matricaria) , all in the most exquisite 

 condition, like those taken on board ship. They all appeared to 

 have emerged from the pupa on that day, as I had been on the 

 lookout for some days past, and certainly did not see one on the 

 wing yesterda3^" 



August 8: "Went on shore this forenoon at 11.30, to get a few 

 more of the Leucophasia [Neophasia] while it remained in good 



condition I had no difficulty in getting as many as I wanted 



.. . . . a day, however, had made a perceptible difference in its 

 condition, as a good many were getting somewhat worn and chipped. 

 They were very easy to catch, flitting from flower to flower in the 

 open places [among the pines] and of very weak and sluggish flight." 



August 14: The first 9 was taken on this date. ''I beat it out 

 of a fir-tree." 



The fact that the only Pierine mimic in the Nearctic Region 

 belongs to a genus with the characteristics described by J. J. Walker 

 suggests an interpretation on the lines of Fritz Miiller's hypothesis. 



I now propose to institute a detailed comparison between the 

 colored pigments of Neophasia menapia and terlooti. 



The Female of Neophasia menapia. — Under surface of hind 

 wing. — A colored spot, roughly triangular in shape, is found in the 

 black marginal band of areas 2, 3, 4, 5, and 6. The sp^ts, as well as the 

 other markings described below, were orange in 4 females, orange-red 

 in 2, and a rather pale vermilion in one. The tint in some individuals 

 tends to deepen towards the base of the wing — especially along the 

 costa. Beyond vein 7, viz., in areas 7 and 8, the pigment is continued 

 at first as a narrow marginal line, which filling area 8 except at its 

 very base, broadens with it toward the base of the ^\^ng. In the 

 opposite direction, beyond vein 2, area Ic bears two spots, of which 

 the upper is sometimes roughly diamond-shaped. These spots 

 are placed one on each side of the dark line, representing a lost vein, 

 which divides the area longitudinally into two sections. Below 

 vein lb a narrow marginal orange line extends over about I of the 

 breadth of area lb. 



In addition to these marginal orange markings, there is also an 

 internervular development of the same pigment starting from the 

 base of the wing, especially distinct in the lower or inner marginal 

 section of area Ic, which in favorable examples is highly colored 

 over more than half its length starting from the base. In strongly 

 marked females a few scattered orange scales are also seen in area 7 

 and in the upper section of area Ic, and they could probably be found 

 ,in other areas of certain individuals. 



