TAOHIDIUS. 19 
and also as regards the maxillar palp, of which, very 
possibly, my figure may be inaccurate. 
Sub-family 2. Tacutpinm, Boeck. 
The species belonging to this sub-family agree with 
the Longipediine in having the first almost exactly like 
the three following pairs of feet, adapted for swim- 
ming and not for grasping, and in having all the 
branches of the swimming feet 3-jointed; the acces- 
sory branch of the second antenna consists of one or 
two joints and is mostly small; the second foot-jaw 
forms a clawed hand and is adapted for prehension, 
and the fifth foot consists usually of only one joint. 
To this division belong the genera Tachidius, Huterpe, 
and ftobertsonia. 
Diagnosis of Genera of Tachidune. 
RP TOMBGC o.oo e ses cepasn in saccaocovsevecnsesoeuse sedecsees Euterpe. 
branches | 
of first {  3-joimted; secondary jointed. s.cc4s5.06.. Tachidius. 
pair of | branch of posterior 
feet | antenna 2-JOINTEM |, cap-sctaves xe Robertsonia. 
Genus 5. Tacuripius, Lilljeborg (1853). 
Cephalothorax broad, and not distinctly separated 
from the abdomen; head united with first thoracic 
segment ; abdomen in both sexes 5-jointed. Anterior 
antenne (Pl. XXXVII, fig. 4) very short, 7-jointed. 
