1S94-] 235 [Morse. 
V. COMPAUISONS OF SPECIES. 
These comparisons Avill be of most value in connection with 
examples of the several species, but also may prove to be of some 
assistance in determining specimens. It should be borne in 
mind that I had of ocalahim and collare but a very limited number 
of specimens before me, and consequently some latitude should 
be allowed statements concerning these species. 
S. COLLARE Scudder. 
Owing to the improbability of the occurrence of this species in 
New England I have thought it not worth while to give extended 
comparisons with the other species, but as the description is not 
given in Scudder's paper and may not be available to some, I 
will point out briefly how it may l)e distinguished from the New 
England species. 
It lias been compared with oculatam under tliat species. From 
saxatile it may be known by the greater height of the metazonal 
carina, the small eyes, tuniid cheeks (see %.), and the lack of a 
pnle basal annuhis on the hind tibi;ie. From bolH by tiie much 
fuller head and small eyes, the obliquity of the notch of pronotum, 
and the lack of pale and fuscous annulations on hind tibiae. From 
SGudderi by the fuller head, smaller eyes, less elevated carina, and 
by the markings of the inner sides of hind femora, — in scudderi 
the proximal two fuscous bands being more or less broadly con- 
nected, in collare almost mIwmvs distinctly separated. 
saxatile 
bolli 
oculatum 
scudderi 
1 
2 
3 
saxatile 
4 
5 
bolli 
6 
1. — S. saxatile vs. *S'. aequale scudderi. 
In saxatile the dorsal portion of the head is less compressed. 
The eyes are noticeal)ly larger and more prominent. The vertex 
is broader between the eyes, and less acute at tiie front. The 
antennae are much longer proportionally, and noticeably annulate ; 
their color blackish fuscous and [^ale : in scudderi brownish or 
blackish fuscous at tip, rusty brown or even red at base and 
scarcely annulate. 
In saxatile the pronotum is less compi-essed, especially behind ; 
the disk less flattened, its anterior margin less angulate ; the pos- 
