Morse.l 2'6Ct [Fch. 21, 
terior process rccttuigular and more hluiilly pointed, its sides 
straiglit, — not acute and with the sides excavate as in scudcleri. 
Tlie MEDIAN CARINA is much lower and less developed through- 
out (see fig.)i tlie disk sloping gradually up to form it. The inci- 
sion is nearly vertical, instead of slightly or even considerably 
oblique. The notch is open, never fenestrate, the two portions 
of the median carina never overlapping as is often the case in 
scudderi. 
In saxatile the tegmina are more distinctly fasciate, the fasciae 
usually broader. The wings are very similar to those of scudderi, 
but the transverse fuscous band has its apical margin straighter 
(in scudderi being rounded next hinder edge of wing), the sub- 
frontal shoot often more acutely terminated and extending further 
toward the base of the wing, at its posterior edge arising more 
abruptly from the fuscous band ; and the apical dusky portion of 
the wing is more often connected by fuscous streaks to the trans- 
verse band. 
In saxatile the hind femoka are more distinctly fuscous-fasciate 
externally, and internally tlie proximal two fasciae less completely 
connected ; the hind tibiae are a less vivid red, the base is black, 
the pale annulus usually distinct; while in scudderi the base 
though often sprinkled with fuscous is rarely or never black, the 
])ale annulus is often entirely lacking, and the red is more intense 
in hue. 
Saxatile is much less pubescent : scudderi being markedly so, 
especially along the lower edge of the hind femora. 
The COLOR of saxatile is black, or brownish fuscous, on an ash- 
gray ground ; of scudderi a rusty, often bright red-brown, Hecked 
with darker, the gi*ound color inclining to ochreous, rai-ely show- 
ing white, which is commonly found in saxatile. 
2. — S. bolli vs. S. aequale scudderi. 
In bolli the head is less tumid below ; the eyes noticeably larger 
in proportion ; the vertex narrower, more acute, and less 
advanced; the face in profile less vertical, and less rounded at 
meeting of costa and vertex. 
In bolli the pronotum is more nearly rectangulq^r behind ; the 
sides of the posterior process straight instead of excavate ; the 
disk is flat, and much less rugose on prozona ; the carina is much 
lower, less arched, equally compressed throughout instead of 
broadly joined to the disk on posterior half of prozona; the inci- 
