( 1-^3 ) 
VII. A Monographic List of the species of Gastera- 
cantha, or Crah-spiders, toith descriptions of 
neiv species, Sfc. By A. G. BuTLER, F.L.S., 
F.Z.S., &c. 
[Read 3rd February, 1873.] 
In the preparation of the present list, I have found M. 
Simon's recent subdivisions (Hist. Nat. des Araign.) of 
great use ; he has not, however, described all the varieties 
of spining in this multiform genus, and therefore I have 
added several, adopting his view of their sub-generic 
value. 
In this paper I have described nineteen species which 
appear to me to be quite new, some of them being 
brilliantly coloured, and others very remarkable in form. 
I am indebted to the Bev. O. P. Cambridge for calling 
my attention to Koch's great work on the Arachnida of 
Australia, now being published at Nuremburg. 
Sub-genus Macracantha, Simon. 
1. G. arcuata. 
Aranea arcuata, Fabricius, Ent. Syst. 3, p. 425, 
n. 65. 
Var. Gasteracantha arcuata, Koch, Arachn. 4, 
p. 34; ph 118, fig. 270(1837). 
Ceylon ; Java, Argent. B.M. 
2. G. curvicauda. 
Epeira curvicauda, Yauthier, Ann. Sci. Nat. 1, 
p. 261, pL 18, figs. 1—6 (1824). 
Plectana arcuata ? Doleschall, Acta Soc. Scient. 
Indo-NederL 5, pi. 12, fig. 3 (1859). 
Java, Argent ; Borneo, Wallace. B.M. 
Seems chiefly to differ from G. arcuata in its shorter 
spines. 
Sub-genus Tatacantha. 
Abdomen unequally hexagonal, broader behind than 
before, with six spines, two short at anterior lateral angles, 
two long, obliquely ascending (sometimes clubbed at ex- 
tremity and pilose), and two slightly divergent, rather 
short, at posterior angles. 
Typical form G. clavatrix. 
TRANS. ENT. SOC. 1873. — PART II. (MAY.) 
