+ 
y- 
1883.] 1 87 [Packard, 
while the fourth is much wider; dorsal face of first scutum smooth ; the 
posterior part of the second scutum a little swollen ; that of the third more 
so ; that of fourth scutum swollen and ridged much as in fifth and succeed- 
ing scuta, Scuta 5-20 are swollen high up on the sides into a shoulder, 
giving a quadrilateral instead of a circular outline to the segment, bulg- 
ing out more subdorsally than below ; the swelling has six longitudinal 
ridges, while the posterior swollen end of the scuta above, especially on 
the posterior half of the body, is coarsely tuberculated, the tubercles being 
rounded rather than flat, and unequal in size. No well-marked setiferous 
tubercles on the side from the middle of the body to the head ; but on the 
last six segments there are on cach shoulder or scutal swelling two minute 
rudimentary swellings or tubercles; but in my specimens I can see no 
sete except on the two terminal segments of the body in Gand 9, where 
on the end of the last scuta there is a seta arising from a basal movable 
joint ; there are three pairs on the lateral anal plates (80th segment). 
Length 18™™; thickness of the body 1.5", 
The young when about half-grown are white, the back of the antennx 
and anterior segments having a very slight dusky tinge. In numerous 
mature specimens from the Senate Chamber, Wyandotte cave, three miles 
in, the body is white, with a slight flesh-colored tint. In numerous (150) 
specimens from this locality, the head and dorsal side of the anterior seg- 
ments are slightly dusky ; the antenne are also usually slightly dusky, 
except the two terminal joints, which are white. 
There is thus seen to be a slight amount of variation in color in speci- 
mens collected at the same date in the same chamber in Wyandotte cave. 
Among the 150 specimens taken at one time and place from Wyandotte 
cave (Senate Chamber) and individually examined, I could see none 
without black eyes, the pigment being well developed. There was a fair 
proportion of males, 
Four specimens which TI collected in Little Wyandotte cave were ex- 
actly the same size as those from Great Wyandotte cave ; they were white 
tinged, dusky on the head and fore part of the body. The eyes are black 
and the eye-patch of the same size and shape, while the antenne are the 
same, 
Six specimens from Bradford cave, Ind. (which is a small grotto formed 
by a vertical fissure in the rock, and only 800 to 400 yards deep), showed 
more variation than those from the two Wyandotte caves. They are of 
the same size and form, but slightly longer and a little slenderer, espe- 
cially joints 8 and 5; joint 7 is decidedly longer than in any others ; 
whiter, more bleached. The antenne are much whiter than in those 
from the Wyandotte caves, and the head and body are paler, more 
bleached out than most of the Wyandotte specimens. The eyes vary 
more than in the Wyandotte examples, one having but 12 facets, another 
14, and another 15, with a few minute rudimentary facets between the 
others. It thus appears that the body is most bleached and the eyes the 
most rudimentary in the Bradford cave, the smallest and most accessible, 
