176 
1. The free part of the labrum is only as long as one fifth of 
the pseudocapitulum. Fifth tooth of the maxillary lobe 
bears no basal one. Labial appendages are only provided 
with two terminal hairs. The inner front margin of the 
trochanter II has above a row of four hairs. 
.. Åbdomen almost as broad behind as in front. Patella 
of the second pair of legs with a dorsal median row of 
pointed hairs. Abdomen is reddish blue without any 
sharp distinction between coloured tergites and pale 
interarticulate membranes. segmentatus. 
Abdomen pointed and much more narrow behind than in 
front. Patella of the second pair of legs with a dorsal 
median row of pointed hairs and a single terminal 
clumsy hair. There is a sharp distinction between the 
blue abdominal tergites and pale interarticulate mem- 
branes. Italicus. 
The free part of the labrum as long as one third of the pseudo- 
capitulum. Fifth tooth of the maxillary lobe bears a basal 
tooth. Labial appendages with three median hairs besides 
the terminal ones. The inner front margin of coxa II has 
above a row of only three hairs. Arabicus. 
[RY] 
ig 
æ 
Eucarus segmentatus C. With. 
(Pl. IV— VI.) 
Opilioacarus segmentatus C. With (21). 
Body. The dorsal part of the cephalothorax merges gradually into 
the abdomen, the most elevated part of which is placed near its front 
margin, sloping smoothly towards the sides and the anal hill. The 
body is broadest near the front margin of the abdomen; but the 
hindmost part is only a little narrower. The first tergites are 
marked by distinct grooves and indistinet muscular spots, the last 
tergites only by distinct spots which are placed much nearer to 
each other than those of the first tergites. There are two oblong 
