4 HOMOPTERA 



d. P ronotum with its posterior margin not more than halt the length oj 



its vertex. 



e. Lateral pronotal margins medially angulately expanded, the angulai 



apices reaching base of basal cell of tegmina 3. Genus Sadaka. 



e'. Late) al pronotal margins a Utile prominent, but not medially angu- 

 lately expanded and not reaching basal cell of tegmina .... 4. Genus Koma. 



a'. Head not fiontallv produced, more or less truncate ami deflected 

 in front 0/ eyes. 



f. (Jitter and posterior membranal margin to tilings very broad, about 



one-third their length 5. Genus Munza. 



f. Membranal margin to wings normal, narrow 6. Genus Platypleura. 



B. Costal membrane of tegmina prominently arched at base and dilated, 



about as wide or 'wider than costal area. 

 g. Head frontallv produced, not truncate, about as long as pronotum 



(excluding its posterior margin) 7. Genus Yanga. 



g'. Head not produced, deflected in trout oj eves 8. Genus Kongota. 



2. Head (including eves) only about or little more than two-thirds the width of 

 base of mesonotum. 



C. Pronotal lateral margins ampliated or angulated. the angular apices not 



or only reaching base of basal ceil of tegmina. 

 h. Costal membrane of tegmina prominently arched at base and dilated. 



i. Costal membrane of tegmina much narrower than costal area . . . g. Genus Umjaba. 

 i'. Costal membrane of tegmina always as broad or broader titan costal 



area 10. Genus Pycna. 



U. Pronotal lateral margins strongly angulately ampliated , the angular 

 apices reaching the middle or near apex of basal cell of tegmina. 

 h'. Costal membrane not prominently arched at base and only moderately 



dilated 11. Genus Ugada. 



[I. Tegmina with numerous, always more than eight, apical areas. 



a. Tegmina semihyaline, only more or less reticulately veined on apical area; 



opercula not quite reaching middle of abdomen 12. Genus Angam'iana. 



a'. Tegmina opaque, venation on apical half dense and furcate ; opercula not 



extending beyond basal segment i3. Genus Polyneura. 



I. Genus IOBA, Distant 



loba. Distant, Ann. Mag. Nat. Hist. (7), Vol. 14. p. 2g5 (1904). 



Characters. — Head (including eyes) wider than the base of the mesonotum, not truncate 

 anteriorly, but with the lateral margins of the vertex a little oblique on each side and the front promi- 

 nently produced; pronotum transverse, its posterior margin only a little less in length than the vertex, 

 the lateral margins strongly and angulately produced on each side, the angulations medial, their apices 

 when the tegmina are expanded reaching near or to about the end of the basal cell; mesonotum about 

 as long as the pronotum; anterior femora with one or more distinct spines, posterior and sometimes 

 intermediate tibiae spined on apical areas; metasternum elevated and centrally sulcated; tympana 

 covered; opercula short, broad, their apices more or less convexly rounded; rostrum reaching the 



