C. Hay Murray 
297 
From front to back the pump is curved after the ogee pattern (Fig. 26), 
the anterior end being the higher, nearly reaching the dorsal surface of 
the head, while, at the hinder end, it rests directly on the thickened 
5ut>~ CPS 
^an^h ot 
C- //• AT. 
Pump rrttisc/ci 
Labrum 
-J?osbrum 
lCl/</CilT S£CT/o/^ o/ //epD 
Sbiyiebs 
TR£f\/S. 5£CT 
0/ Pump 
Spirmle 
Figs. 25—27. Pharyngeal pump of A. lectularia. 
ridge of chi tin on the under surface of the head. From side to side the 
pump in section is more or less like the letter U, the sides being very 
short, while the base is very much greater in proportion (Fig. 25). 
Parasitology vii 20 
