INSECTA. 
352 
Some have but fifteen pairs of feet and their body viewed from 
above presents fewer segments tlian Avhen seen from beneath. 
ScuTiGERA, Lam . — Cermatia, Illig. 
The body covered with eight scutelliform jjlates, under each of 
which INI. Marcel de Serres has observed two pneumatic sacs or vesi- 
cular trachese, which receive air and communicate with lateral and 
inferior tubular trachepe. The under part of the body is divided into 
fifteen semi-annuli, each bearing a pair of feet, terminated by a very 
long slender multi-articulated tarsus ; the last pairs are more elonga- 
ted ; the eyes large and compound. 
Their antennae are slender and tolerably long; the two palpi sali- 
ent and furnished with small spines. The body is shorter than in 
the other genera of the same family, and the joints of their feet are 
proportionably longer. 
The Scutigerae, which by these characters form the passage from 
the preceding family to the present one, are extremely agile animals, 
and frequently part with some of their feet when seized. 
The species found in France j- conceals itself between tlie 
beams and rafters of houses. 
Lithobius, Leach. 
The stigmata lateral; body divided above and beneath into a simi- 
lar number of segments, eacli bearing a pair of feet; the superior 
plates alternately longer and shorter, and overlapping each other 
close to tlae extremity. 
L. forficatm ; Scolopendra forficuta, L. ; Fab., De Geer; 
Geolf., Hist, des Insect., II, xxii, 3; Panz., Faun. Insect. Germ., 
L., xiii; Leach, Zool. Miscel., cxxxvii 
The others have a least twenty-one pairs of feet, and the segments 
both above and underneatli are equal in size and number. 
ScOLOrENDRA, Lin. 
Those which form the two feet that immediately follow the two 
liooks forming the exterior lip, presented but twenty-one pairs, and 
Avhose antennae have seventeen joints, constituting the genera Scolo- 
pendra and Crytops of Leach. There are eight distinct eyes, four 
on each side in the first, and that in whicli the largest species are 
found ; in the second, they are null or but very slightly visible. 
The most southern departments of France and other countries 
of the soiith of Europe, produce a species — Scolopendra cinya- 
* Dr. Leacti makes two pairs more by including the palpi and the hook-like feet 
of the head. 
-f- The Scolopendre a vingt-huif pattes of GeofFroy which appears to diifer from the 
the S. coleoptrata, Panz., Faun. Insect. Germ., L, xii, and from that ofLinneeus; — 
lulus araneoides, Pall., Spicil. Zook, IX, iv, 16; — Scolopendra longicornis, Fab., of 
Tranquebar. See also Leach, Zool. Miscelk, Cermatia Uvula, CXXXVI, and Lin. 
Trans. XIV. 
X L. variegatus, lavilabrum, Leach, Lin. Tnans., XI. See also vol. III. of his 
Zoological Miscellany. 
