165 
Leist. im Gebiete der Entomologie währ. d. Jahr. 
1886. 
Thorell, T.: Pedipalpi e Scorpioni dell’ Arcipelago 
Malese (Annali del Museo Civico di Storia Natur. 
di Genova, Ser. 2a, Vol. VI, 1888, p. 827—428). 
Tarnani, T.: Ueber die Thelyphoniden aus den Samm- 
lungen einiger russischen Museen (Hore Soc. 
Entom. Ross. T. XXIV, 1890, p. 511—40, Tab. III). 
A. The Segmentation of the Abdomen. 
It will be necessary to make a few remarks on the 
segmentation of the abdomen before going on to the 
different organs. 
In an interesting paper R. I. Pocock states (op. 
cit. p. 3) about Thelyphonus »the obliteration of the 
sternite and appendages of the second abdominal somite 
by the enlargement and backward extention of the 
sternite of the first«. I consider, however, this inter- 
pretation to be a mistake. Pocock asserts himself that 
the Ist and 2d sternite in the Scorpiones is lodged far 
forward, the 2d carries the pectines, »the first in all 
probality constitute the genital operculum«. The inter- 
pretation of the 2d sternite is undoubtedly correct; as 
to his view on the genital operculum being the Ist 
sternite, it must remain doubtful, but at all events its 
place has to be sought far forward between the basal 
part of the hind coxve; the 3d sternite has become much 
longer than the preceding and following ones. In 
Thelyphonus, exactly underneath Ist tergite, a consider- 
ably long, transverse, chitinous plate is found, which is 
seen very plainly, particularly when the abdomen is bent 
upwards forming an angle with the cephalothorax; the 
plate is separated from the sternum by a 
broad, soft integument, furnished with stran- 
gely inspissated wrinkles, and to my convic- 
