PARAOORO'I'OCA AKERMANI (waRREN), 309 



developed tergites, in segment II, and the first of the 

 developed sternites in segment TV, first and second segments 

 constricted to form a stalk carrying dorsally the inflated 

 forwardly-directed portion. The up-bending of the abdo- 

 men occurs in the third segment. Abdominal sternites 

 IV-VIII occur as five isolated transverse arches of consider- 

 able size. Abdominal tergites II- VI are present as narrow 

 but strong transverse, chitinous bars, while tergites VII and 

 VIII are wider and plate-like. Lower surface of inflated 

 portion of abdomen concave and resting on the l)ridgo-like 

 elytra by two lateral longitudinal ridges. 



Supposed exudatory structures are present as follows : two 

 thin-walled backgrowths from the posterior surface of the 

 metathorax, one lying on each side of the abdominal stalk ; a 

 bilobed swelling projecting medio-dorsally between the head 

 and pronotum ; and a median posteriorly directed SAvelling* 

 from the tero-al reo-ion of abdominal segment VIII. 



IV. DETAILED DESCRIPTION OF SPECIES. 



1. External Morphology. 



Paracorotoca akermani (Warren). 



Corotoca akermani Warren. Ann. Natal Museum, vol. iii, pt. L 



p. 105, 1914. 



General Form, — The head and thorax are essentially 

 Aleocharine in character. The hind-wings or alfB are very 

 rudimentary, being reduced to small crumpled, membranous 

 structures concealed under the elytra. The anterior portion 

 of the abdomen is constricted into a comparatively narrow,, 

 short stalk extending backwards in line with the head and 

 thorax ; the posterior portion is somewhat barrel-shaped and 

 bears five separate, transversely-placed sterna ; it is turned 

 forwards towards the head with its morphological dorsal 

 surface resting horizontally on the upper surface of the 

 elytra. In the female the apex of the abdomen reaches 

 forwards slightly in front of the middle of the pronotum,. 



