CHARACTERS. Vanilla. Insularis. 
it, (E pmo) ttayal (Crolfeye ce air na oe \ociart ean Ores Dios Paler. 
UCC eatetawtictstefsielaaiallicte.= “tpi-)¢ 2. nsetes) isis voters Smaller, 
3. Proportionate breadth Always narrower 
c Broad as long. 
GREAT Sorc 2h i than long. : 
4. Inner spots in cell of 
pl sees Separated. Fused. 
: primaries : 
5. Number of white dots Three Tie 
in same cell: ... r i 
Gy ULB sy iG) pee ae ere West of Gulf Stream.| East of Gulf Stream. 
Now let us with a considerable material before us question these 
characters, and see whether they are of such nature as to warrant their 
being elevated into the specific ranks. First, as to ground color. No 
one should know better than our author, who has travelled and collected 
over a large extent of territory, the illusiveness of this character. As a 
matter of fact his plate fails to show any difference in the general shade 
of the two species and our comparisons of a large series covering a 
_ wide geographical range points out the fact that while the West Indies 
seem to afford a greater number of pale males and less suffused females 
the United States also furnishes no inconsiderable number. The palest 
specimen we have yet seen is a J in the collection of the American En- 
tomological Society from Georgia. Oddly enough the most brilliant 
and deepest tinted specimen in that collection is from those taken by 
Dr. Abbott at Samana Bay, Hayti. 
Second, as to the relative size. While our author’s plate shows an 
even greater variation than his text would indicate in this particular, and 
while it is evident that there is a considerable difference in this particular 
and in the outline of the wings if the two forms are constant, here again 
it is found that the intergrades are a formidable factor—predominate in 
fact, the extreme forms being unusual either on the main land or the 
islands. A lot of starved larvee of vandle@ turned out a lot of males in 
Tennessee in 1877, which on an average measure considerably less than 
the dimensions given for 7zsu/aris. The effect of such a climate as holds 
in the Greater Antilles on both the size and suffusion of markings of a 
species has already been fully pointed out by me in Papilio, Vol. 4, 
pp. 26—3o. 
