THE CANADIAN ENTOMOLOGIST, 297 



ihe series there is but little variation, the greatest degree of prominence 

 being seen in the Pennsylvania specimens (typical variegata) and the Lake 

 Simcoe specimens. The eyes of some of the $ $ from North Bay 

 approach pretty closely those of the $ $ from Speckled Mt., and the $ 2 

 from the latter locality are quite like those from North Bay in this respect. 

 There is, however, very little range of variation among the Canadian 

 specimens. An idea of the total amount of variation in the prominence 

 of this organ can be obtained from the accompanying plate. 



2. Antennae. — The variation in the length of this structure can be 

 seen by a glance at the table of measurements. The specimens from Mt. 

 Washington have relatively the shortest antennti?, and it is plain from the 

 measurements of the New England specimens that they average distinctly 

 shorter than the Canadian specimens. From Algonquin Park southward 

 to Pennsylvania, except at high altitudes, we find a gradual but steady 

 increase in the length of the antennae, the longest ones belonging to 

 Pennsylvania specimens. In typical variegata the antennae of the ^ are 

 distinctly longer than the hind femora, in glacialis slightly shorter. In 

 most of the Canadian specimens they are about equal in length, being 

 faintly shorter in the North Bay specimens, faintly longer in those from 

 Lake Simcoe. 



3. The hind femora are relatively shortest in the N. E specimens, but 

 are practically constant in length throughout the remainder of the series. 

 Some of the Algonquin Park series, however, are inseparable from the N. 

 E. specimens on this score. A more important feature is the colour and 

 distinctness of the bands of the hind femora. In specimens from Algon- 

 quin Park and North Bay, hke those from N. E., they are uniform green, 

 with the faintest traces of bands, but in the majority from this locality they 

 are more or less distinctly though feebly banded, the lighter areas being 

 yellowish green. A number of <? (^ , however, have the superior sulcus 

 as conspicuously banded as in the Pennsylvania specimens. The hind 

 femora of the latter are in the $ strongly fasciate with pale yellowish and 

 dark brown or blackish, the contrast being much greater in the main than 

 in the specimens from Lake Simcoe, which most resemble them. Every 

 gradation is present in the series. 



4. The furcula shows great diversity of size and form. As with the 

 other characters, the most northern of the Ontario specimens are most like 

 typical glacialis in the form of this structure, and it is longest in some of 

 the North Bay and Algonquin Park specimens, shortest in the Pennsyl- 



