SCUTIGERA.—LITHOBIUS. 8 
sculptured, the tergites being distinctly undulated laterally, and the interocular area of 
the. head strongly scooped out transversely. In colouring it calls to mind S. rugosa 
of Newport, from East Africa, which has the same complete median dorsal flavous 
band, the same wide black band on each side of it, and the same strongly annulate 
legs. But the stomata in S. rugosa are not fuscous, and the tibie are more strongly 
annulate. 
Subclass ARTIOSTIGM A*. 
[ Silvestri, Ann. Mus. Genova, xxxiv. p. 623 (1895).] 
Order LITHOBIOMORPHA, nov. 
[= Unguipalpi, Bollman, 1893; Artiostigmata, Silvestri, 1895.] 
Containing the Lithobiide and Cermatobiide. 
Fam. LITHOBIIDA, Newp. 
LITHOBIUS. 
Lithobius, Leach, Trans. Linn. Soc. xi. p. 381 (1814). 
The following is a key to the identification of the species of Lithodius known to me :— 
a. The posterior angles of the ninth, eleventh, and thirteenth terga squared 
(about 30 ocelli and 30 antennal segments). . . - , « stolli, ap. n. 
b. he posterior angles of the ninth, eleventh, and thittacnth cise hae. 
. Ocelli about 30 in number on each side (also about 30 antennal segments) ; 
claw of generative forceps of female trifid . . . . . . +. . «+ e@ztecus, H. & §, 
6*. Ocelli about 9 or 10 on each side; claw of female generative forceps 
simple. 
a*, Of very large size, over 30 millim., with about 60 antennal segments 
and 10 to 12 coxal teeth ...., s+ + ee ee 
6*. Under 30 millim., fewer than 60 antennal irate and (except in 
L. decodontus) with only 6 coxal teeth. 
a’. Coxal teeth about 10, all alike, and normally formed . . . . . decodontus, sp. n. 
6°, Coxal teeth only 6, the external on each side spinuliform ; anal legs 
of the male modified. 
a‘. Male with legs of the fourteenth pair unmodified ; the first tarsal 
of the anal legs modified. 
* [ here use this term in a much wider sense than that proposed by Silvestri, to embrace all the 
Chilopoda that were called Holotarsia by Brandt. 
B2 
