The Ohio Naturalist. 
[Vol. VII, No. 8, 
170 
Length 1.9 mm.; head .8 mm. long, .8 mm. broad, .4 mm. deep 
from front to back; antennae 1.7 mm. long, joints in the ratio 
of 7:22:25:6; body 1.6 mm. long, .8 mm. broad, .9 mm. deep; 
spring 1.6 long, segments in the ratio of 5:6:2; sucker, including 
filaments, 1.5 mm. long. Habits, found in numerous localities, 
under decaying wood, under damp stones, or boards, and occa¬ 
sionally found on various species of fungus. 
This is one of the most common and widely distributed species 
of the genus. I have found it quite abundantly in Ohio, and it 
has been reported as abundant in Maine by Harvey who found 
it associated with P. mcirmoratus on Agarics and Boleti, and has 
also been reported from Minnesota by Guthrie. I have taken 
it in mid-winter in Ohio, where it occurs in small colonies in 
suitable localities. The very young have a decidedly bluish 
tint, but otherwise resemble the adults very closely. They are 
sluggish in their movements, but when disturbed can jump eight 
or ten inches. Harvey states that the smaller claw is over a half 
the length of the larger; however, in all the specimens I have ex¬ 
amined a long-hair-like projection extends beyond the end of the 
larger claw. 
7. Papirius olympius MacGillvrav. 
1893. Papirius olympius MacGillvray. 
1895. Papirius olympius DallaTorre. 
Prevailing color reddish, spotted with dark brown, in young 
specimens purplish. Head, vertex covered with stiff bristles; a 
longitudional brown 'band extending from the back of the head 
to the eye spot, another in the middle of the vertex extending 
down the middle of the front. Antennae nearly as long as the 
body, purplish, hairy, basal segment light at base, dark at apex 
and one-fourth the length of the second; second segment one- 
half the length of the third, third segment slender, with seven 
sub-segments at apex; fourth segment with six sub-segments. 
Eve spot black. Abdomen and thorax with two sinuate brown 
bands on each side of the dorsum, the middle ones meeting at 
the apex and base of the thorax and on the basal half of the ab¬ 
domen; also a band extending from this basal transverse band 
of the abdomen along the middle tf the back towards the head 
bilobed in front, a triangular spot just before the apex of the 
abdomen, and promiscuous brown mottlings on the side; body 
covered with broad flattened hairs. Legs reddish, long, slender, 
spiny. Claws long, outer three times as long as the tibia is 
broad, with two teeth; inner two-thirds the length of outer, with 
a hair at apex reaching beyond the apex of the outer claw; 
tenant hair wanting. Furcula long, slender; manubrium short, 
two-thirds the length of dentes; dentes with a row of long, hair¬ 
like spines along the side of each member; mucrones about one- 
fourth the length of dentes, serrate beneath. 
