2 HOMOPTERA 



SYNOPSIS OF GENERA 



I. Abdomen in cf not tubercnlate beneath. 



A. Tympanal coverings narrower , but scarcely shorter than tympanal cavities. 



a. Lateral margins of pronotitm moderately ampliate. 



b. Head shorter than pronotitm . 



c. Abdomen longer than space betii'een apex of head and base of crucifoi m 



elevation . 



d. Head almost as long as breadth between eyes. 



e. Tegmina ample, nearly three times as long as broad i . Genus Tettigia. 



d'. Head about half as long as breath between eyes. 



e'. Tegmina narrow, more than three times as long as broad ... 2. Genus Onomacritus. 



a'. Lateral margins of pronotitm straight, not ampliate. 



b'. Head as long as pronotitm . 



c'. Abdomen short, about as long as space between apex oj head and 



base of cruciform elevation 4. Genus Emathia. 



B. Tympanal coverings both narrower and shorter than tympanal cavities. 



a. Wings with five apical areas 5. Genus Rustia. 



b. Wings with six apical areas. 



4~ d. Opercula in cf short and transverse, not or scarcely extending beyond 

 base of abdomen. 



e. Head defected anteriorly , front not prominent. 



f. Pronotitm distinctly shorter than mesonoium. 



g. Length of head about equal to breadth between eyes; abdomen in cf 



longer than space between apex of head and base of cruciform elevation. 

 h. Greatest -width of tegmina only one-third of length, broader than wings. 6. Genus Terpnosia. 

 h'. Greatest tenth of tegmina considerably more than one-third of 



length, but scarcely broader than wings 8. Genus Psalmocharias. 



g'. Length of head less than width between eyes; abdomen in cf about 

 as long as space between apex of head and base of cruciform 

 elevation. 



h". Tegmina in cf more than three times as long as broad . . 3. Genus Tamasa. 

 h'". Tegmina in cf a little more than twice or less than 



three times as long as broad 7. Genus Cicadatra. 



t? d'. Opercula in cf short but well developed, at least reaching apex of 



second abdominal segment 11. Genus Khimbya. 



d". Opercula in cf extending beyond the middle of abdomen. 

 e'. Head not deflected anteriorly, the front very prominent. 

 £'. Pronotitm as long as mesonoium 12. Genus Lethama. 



C. Tympanal coverings shorter, but not narroiver, than tymhanal cavities. 



e". Head with the front prominent, its lateral margins at right 

 angles with anterior margins of vertex. 

 i. Lateral margins of pronotitm amhliate, narroioed anteriorly . 



k. Abdomen beneath strongly channelled near lateral margins .... i3. Genus Kama lata. 

 i'. Lateral margins of pronotitm convex anteriorly, medially conca- 

 vely sinuate. 



