4o8 
The Ohio Naturalist. 
[Vol. VI, No. 2, 
Fla., Sand Point, Fla., Retreat, X. C., Fredericksburg, Va., and 
Detroit, Mich. (To this list can now be added Port Antonio, 
Jamaica, and Georgesville, Ohio.); for C. pennsylvanicus , Pough- 
kepsie, N. Y., and Lake Poinsett, Fla. I read over carefully the 
list named by Mr. Banks in his paper (III) above quoted, for the 
purpose of noting the distribution north and south, and east and 
west. I have concluded from this that there are distinct eastern 
and western species, but probably only a few distinct northern 
and southern species. Thus Pacific Coast species are reported 
no farther east than Utah, Montana and Wyoming, while eastern 
species are reported no farther west than Texas, Kentucky, and 
Michigan. Obisium Brnnneriiim, Hagen, common in the east, 
is reported from Utah, but Mr. Banks seems to have some doubt 
in this case that the Utah species is the same. Chelifer can- 
croides, Linn., Faun. Suec., is of course reported from the Pacific 
Coast and perhaps occurs over the whole U. S., and if not now, 
will very likely soon occur throughout the entire world. Two 
or three species are reported only from Texas and Colorado. 
Eastern and Pacific Coast species, on the other hand, generally 
have a wide north and south distribution. Thus among other 
eastern species named by Mr. Banks, Chelifer biseriatuni, Bks., 
reported only from Lake Poinsett, Fla., was found by myself 
under a neglected carpet infe.sted with buffalo moths, at Berea, 
Ohio, in 1901. The two species collected in Jamaica also illus- 
trate this far north and south distribution nicely, extending 
even to within the tropics. 
This wide north and south distribution of the species of 
pseudoscorpions versus their rather limited east and west distri- 
bution, I believe is associated with the migration of insects or 
birds. Pseudoscorpions have, however, to my knowledge, 
never been found upon birds, so that nothing definite can be 
stated in this respect. On the other hand, they are known to 
cling to insects (chiefly flies and beetles) and arachnids (see 
Associ.vtioxs with Insects) and to be transported from 
place to place by these. Certain insects are known to migrate 
for hundreds of miles. Thus a moth, the Black Witch, Erebus 
odora, is supposed to migrate from the West Indies and l^lexico 
to the U. S., while the Monarch, Anosia plexippus, is believed 
to migrate south in fall and north in Spring. Xo doubt there 
are other migratory insects, so that the distribution of pseu- 
doscorpions will, I believe, sometime find its explanation in 
this direction. There being nothing like a complete list of 
pseudoscoripons in existence, it is eviclent that these speculations 
are somewhat tentative. 
I tried to gain some idea of the distribution in South America 
bv comparing the papers of Ellingsen (VIII), Balsan (I) and 
Banks (III). I found no species mentioned that are common to 
