Mr. A. G. Butler on new Spectes of Ceerostris. 105 
having the same general form, though differing wholly in 
pattern and in the number of mammoid tubercles across the 
front of the abdomen, was received with C. Cowant. 
5. Cerostris excellens, sp. nov. (Pl. VI. figs. 5, 5a.) 
2. Cephalothorax almost square, a little longer than broad, 
expanded and arched behind the caput, where it is abruptly 
and deeply excavated, its centre yellowish, shading into cas- 
taneous red in front and at the sides ; caput nearly twice as 
broad as long, snow-white, yellowish in front, and with a 
black, longitudinal, impressed central dash behind the central 
oculiferous tubercle, the latter very prominent, forming a short 
trapezium, black in the centre and with the eyes almost 
wholly black, rather small, especially the anterior pair, between 
which and the posterior pair there is a shorter interval than 
in the preceding species ; lateral tubercles prominent, slightly 
shorter behind than in front*, the eyes very small; two ob- 
tusely conical lateral brown tubercles (one on each side) 
behind the latter, and two widely separated similar tubercles 
‘near the back of the caput. Abdomen formed nearly as in the 
preceding species, but decidedly longer, sericeous whity brown, 
crossed in front by parallel series of minute black sigilla, the 
last series being placed behind the anterior arched series of 
tubercles; the latter, which form the anterior margin, are 
eight in number, the third and sixth small and slightly be- 
hind the line of the others, conical; behind the first and last 
there is on either side a deeply bifid obliquely ascending pro- 
cess ; a little in front of and in the central line between the 
two lateral processes is a rather large conical tubercle; nearly 
halfway between the lateral processes and the base of the 
bifurcation of the posterior margin there is on each side a 
similar conical tubercle, and immediately in front of the bi- 
furcate terminal process are two very obtuse tubercles ; a black 
band runs down each side of the abdomen, across the two 
outside anterior tubercles and the lateral processes, to beyond 
the middle of the lateral surface ; there is also a brown central 
- longitudinal ovoid spot between the four ordinary black dots ; 
behind this and including the posterior lateral tubercles are 
two transverse black dashes, behind which, again, are two 
slightly convergent black longitudinal bands, terminating in 
the bifid process, which is also black; ventral surface oliva- 
ceous, with a broad central black band, bounded on each side 
by three white spots. Legs with the femora bright reddish 
castaneous, the tibiz and tarsi black banded with white, flat- 
* The reverse is the casé in most species. 
