( 325 ) 



Fig. 7. Labium of Arixenia. 



sm = submentum. 



m = mentiiiu. 



pff = palfiiger. 



Ip = labial palp. 



// = ligula. 

 ,, S. Head, thorax, and segments 1 to 3 of abdomeu of Arixenia, lateral view. 



ant = antenna. 



a = eye. 



mi = microsternnm. 



st = sternum. 



per = peristernum. 



epst = episteruum. 



epm = epimerum. 



ti = tTocUantine. 



gfi = stigma. 



at I, at 2, at '6 = first, second, and tiiird tergites of abdomen. 



as 2, as 3 = sternites of first and second abdominal .segments. 

 ,, '•). Hypopharyux of .477a;e«?a, dorsal view. 



,, In. Head of Arixenia, the mandibles, maxillae, and labinm, as well as a 

 jKirt of the wall of the head-capsule removed, ventral view. 



Ir = labrnm. 



hp = hypopharynx. 



te = tentorium. 



oe = oesophagus (lying dorsally of the tentorium, in onr figure 

 therefore beneath the tentorium). 



CI/ = condylus for the mandible. 



Plate XVIII. 

 ,, 1. Alimentary canal of Arixenia, dorsal view, 



//■ . = labrnm. 



te = tentorium, lying beneath the oesophagus. 



= facetted eye. 



oe = oesophagus. 



pr = proventriculus. 



sto = stomach, with two bundles of Malpighian tubules on the dorsal 

 side of the inner coil and two bundles on the ventral side. 



.)//; = Malpighian tubules. 



in = small intestine. 



;• = rectum. 



sa = sack-like enlargement of base of stomach. 

 „ 2. Alimentary canal and ovaries of Hemimerus, dorsal view. 



te = tentorium. 



oe = oesophagus. 



pr — proventriculus. 



sto — stomach, with the Malpighian tubes. 



in = small intestine. 



/• = rectum. 



ov = ovaries. 



ovd = oviduct. 



