( 324 ) 



Arixenia gen. nov. 



Wingless, hairy. Head broader tlian long, the clypeus longer than the frons. 

 Upperlip fonr times as broad as long, its anterior edge very slightly bent downwards 

 in the centre. The space between the two rows of bristles at the molar edge of 

 the inner lobe of the maxilla very narrow. Mentnm broader than long, strongly 

 ronnded at the sides. Antenna tliree-fourths the leugtli of the body, segment 1 

 extending to middle of pronotum, 2 very short. Pronotum nearly semicircutar, 

 mnch broader than long, as long as the meso-and metunotnm together. Mesonotum 

 strongly rounded at the sides and behind. Legs long, all of nearly eijual length 

 and the same in structure ; femora about as long as the tibiae, equalling the 

 thorax in length ; first tarsal segment bnt little longer than the second, both 

 without a very dense covering of hairs on the underside, third segment almost 

 three times the length of the first and second together. 



Type : Arixenia esan spec. nov. 



The nymotypical specimen of the species which served as original for fig. 1 

 of PI. XVI. has been presented to the British Museum. 



EXPLANATION OF PLATES XVL, XVII., & XVIIL 



Plate XVI. 



Fig. 1. Arixenia, esaii,^n\&x^edi x 9. 

 „ 'Z. Seventh to eleventh abdominal segments of the same, ventral view. 



A = anns. 



(•;' = cerci. 

 ,, 3. Sixth to eleventh abdominal segments, side-view. 



,4 = anus. 

 „ 4. Intima of proventriculus of Arixenia. 

 „ 5. The same of Hemimerus. 



Plate XVII. 



Fig. I. Head, thorax, and proximal segments of abdomen of Arixenia. 



mi = microsteruum. 



ejist = episternum. 



a = trochantine. 



tr = trochanter. 



CO = coxa. 

 ,, 2. Left maxilla of Arixenia, ventral view. 



a 1, a 2 = the two sclerites of the cardo. 



bl, 62, b2 = the three parts of the stipes ; b'.i = palpiger. 



f 1 = lacinia (inner lobe of the maxilla). 



c2 = galea (outer lobe of the maxilla). 

 „ 3. Right uiandil)le of Arixenia, dorsal view. 

 „ 4. Left mandible, ventral view. 

 „ 5 Eighth segment of the antenna, showing the jjatch of sensory pits present 



on each side of segments 3 to 13. 

 ., 6. Hindtarsns, ventral view. 



a, b, c = first, second, and third segments. 



un = claw. 



tb = tibia. 



