thysanoura. 
353 
lata, Lat. ; Sc. morsitans, Vill., Entom., JV, xi, 17, 18 — which 
is nearly as large as the common species of the Antilles, but has a 
more flattened body *. 
Those which form the genus Crytops, Leach, have a rougher an- 
temiEe than the Scolopendree, and their two posterior feet are more 
slender. Leach mentions two species found in the environs of Lon- 
don f. 
Ill such as form the genus Geophilus, Id., the number of feet is 
more than forty-two, and often considerably so. The antennoe con- 
sist of but fourteen joints, and their extremity is less tapering; the 
body is proportionably narrower and longer. The eyes are but 
slightly apparent. Some of the species are electrical j'. 
ORDER IL 
TIIYSANOURA. 
This order consists of apterous Insects, supiDorted by six feet, that 
experience no metamorphosis, and have, in addition, particular organs 
of motion either on the sides or the extremity of the abdomen. 
FAMILY I. 
LEPISMEN^, Lat. 
Setiform antennae divided from their origin into very numeroiis 
and small joints ; mouth furnished with very distinct and salient 
palpi ; each side of the under part of the abdomen provided with a 
range of moveable appendages, in the form of false feet ; abdomen 
terminated by articulated setae, three of which are the most remark- 
able ; body always covered with small shining scales. 
It comprises but one genus, the 
Lepisma, Lin. 
The body of these animals is elongated and covered with small scales, 
frequently silvery and brilliant, from which circumstance the most 
* Scolopendra 7norsifans, L. ; De Geer, insect., VII, xliii, 1. For the other spe- 
cies, see Zool. Miscell., Ill ; the Scolopendra (jigantea, L., lirown. Jam., XLII, 4, 
and other large but perfectly described species. 
-f" Crytops horfensis, Zool. Miscell. ; CXXXIX; Id., Ib., Crytops Saviynii. 
f S. elect )-ica, C. ; Erisch., Insect., XI, viii, I; — T. Occident alls, L. •, List. Itin. 
vi ; — S. phosphorea, L. — it fell from the clouds on the decks of a vessel one hundred 
miles from the continent. See Zool. Miscell., Ill, Geophilus tnaritimus •, CXL, 1, 2; 
— G. Longiconxis, tab. ead., 3 — 6, and some other species. 
VOL. III. 
A A 
