Vor. Il, Pr. II] HEBARD—DERMAPTERA AND ORTHOPTERA 339 
A series of four males, two females and several immature 
individuals from the material recorded by McNeill, belonging 
to the Leland Stanford Jr. University, is before us. 
Compared with the five other species previously assigned to 
Cryptoptilum, this species is found to be nearest C. antillarum 
Redtenbacher. The present is a more slender insect, with ex- 
pansion of pronotum caudad not fully as decided, dorsal surface 
of abdomen scarcely darker than pronotum, widely spaced 
minute dark annuli of antennz distinct, and female subgenital 
plate obtuse-angulate emarginate at an angle of slightly over 
ninety degrees. 
In the more distinct antennal annuli, which in antillarwm are 
subobsolete to obsolete, and the weaker emargination of the 
female subgenital plate, convergence toward C. hesperum Rehn 
and Hebard is indicated, the female subgenital plate in that 
species showing no emargination whatever. 
The distribution of antillarum extends through the West 
Indies and southeastern United States, hesperum is known only 
from Lower California. 
Individuals of the species of this genus are all heavily clothed 
with scales. These scales are very loosely attached, however, 
and frequent specimens are often taken which have lost a por- 
tion of this covering, while specimens which have been care- 
lessly packed or placed in liquid preservative frequently lose 
practically their entire scale covering. 
McNeill placed far too great importance on the apparent dif- 
ferent degrees of scale covering in describing his lepismoide 
and referred the specimen of erraticum noted above to that 
species, apparently solely because it alone of the series of errati- 
cum before him had retained an ample scale covering. 
Length of body ¢ 7.8-8., 2 9.9.8; length of pronotum ¢ 
4,, 2 2.3-2.7; greatest pronotal width ¢ 2.6, 2 2.2-2.6; length 
of caudal femur ¢ 4.8, 2 5.2-6.; length of ovipositor 4.8—5. 
mm. 
