84 Mr. W. L. Distant on Homoptera. 



Forliinia byrrhoides. 



Issus byrrhoides, Walk. List Horn., Suppl. p. 89 (1858). 



Hab. North China {Fortune, Brit. Mus.). 



Genus Trienopa. 



Tnenopa, Sign. Ann. Soc. Ent. Fr. (3) viii. p. 188 (18G0). 

 Eriphyle, StSl, Ofv. Vet.-Ak. Forh. 1861, p. 208. 



Type, T. flavida, Sign. 



Tj'ienopa retracta. 

 retractus, Walker, MS. 



A specimen thus labelled and derived from " Cape Coast " 

 is in the British Museum. It has not been described by 

 Walker, is allied to longifrons, Walk, (of which it is probably 

 a pale variety), but is only represented by a single example in 

 moderate condition. 



It has nothing to do with the Issus retractus, Walk. (Journ. 

 Linn. Soc, Zool. i. p. 152, 1857), from Borneo, which 

 belongs to the genus Tetrica, Stal. 



Genus Tetrica. 



Tetrica, StSl, Hem. Afr. iv. p. 208 (1866) ; Dist. Faun. Brit. Ind., 

 Rhynch. iii. p. 339 (1906). 



Type, T. fusca, Stal. 



Tetrica retracta. 



Issus retractus, Walk. Journ. Linn. Soc, Zool. i. p. 152 (1857). 

 Hah. Borneo. 



Tetrica ovalis. 

 Issus ovalis, W^alk. Journ. Linn. Soc, Zool. i. p. 154 (1857). 

 Hab. Borneo. 



Tetrica literosa. 

 Isstis literosus, Walk. Journ. Linn. Soc, Zool. i. p. 154 (1857). 

 Hab. Borneo. 



Tetrica nanulum. 



Hysteropterum nanulum, Walk. Journ. Linn. Soc, Zool. x. p. 126 

 (1868). 



Hab. Morty Island. 



