294 Mr. W. L. Distant on Horaoptera. 



less angularly produced. Head (including eyes) about as 

 wide or wider than base of mesonotum, or sometimes little 

 more than two thirds of its width ; costal membrane of 

 tegmina sometimes much arched and dilated, the apical cells 

 usually eight in number, but sometimes smaller in size and 

 much more numerous; tegmina varying in hue from pale 

 hyaline to dark opaque. 



Synopsis of Genera. 



I. Tegmina with eiglit apical areas. 



1. Head (including eyes) about as wide or wider than 



base of mesonotum. 



A. Costal membrane of tegmina not prominently 



dilated nor arched at base. 

 a. Head fi-ontally produced, not truncate, above 

 about as long as pronotum (excluding its poste- 

 rior margin). 

 h. Pronotum with its posterior margin only a 

 little less in length than that of its vertex ; 

 its lateral margins medially angulately ex- 

 panded, the angular apices reaching to or 

 nearly to the apex of basal cell of tegmina . , loba. 



c. Pronotum with its posterior margin little 



more than half the length of its vertex ; its 

 lateral margins medially angulately ex- 

 panded, the angular apices only reaching to 

 about middle of basal cell of tegmina Muansa. 



d. Pronotum with its posterior margin not more 



than half the length of its vertex. 

 e. Lateral pronotal margins medially angu- 

 lately expanded, the angular apices 

 reaching base of basal cell of tegmina .... Sadaka. 

 ee. Lateral pronotal margins a little prominent, 

 but not medially angulately expanded 

 and not reaching basal cell of tegmina . . Koma, 

 aa. Head not frontally produced, more or less trun- 

 cate and deHected in front of eyes. 

 /. Outer and posterior membranal margin to 

 wings very broad, about one third their 



length Munza. 



ff. Membranal margin to wings normal, narrow. . Platypleura. 



B. Costal membrane of tegmina prominently arched 



at base and dilated, about as wide or wider than 

 costal area. 

 g. Head frontally produced, not truncate, about as 

 long as pronotum (excluding its posterior 



margin) Yanga. 



gg. Head not produced, deflected in front of eyes . . Kongota. 



2. Head (including eyes) only about or little more than 



two thirds the width of base of mesonotum. 

 0. Pronotal lateral margins ampliated or angulated, 

 the angular apices not or only reaching base of 

 basal cell of tegmina. 



