166 CATALOGUE OF 
South America. 
20. GERRIS ERYTHROPUS. 
Hydrometra erythropus, H.-Sch. Wanz. Ins, ix. 68, pl. 300, f. 923. 
Brazil. 
Div. 2. 
Limnogonus, Stal, Hem. Fabr, i. 132. 
21. GERRIS HYALINA. 
Hydrometra hyalina, Fabr. Syst. Rhyn. 258—Limnogonus hyalina, Stal, 
Hem, Fabr. i. 133. 
South America. 
Africa. 
22, GERRIS SWAKOPENSIS. 
Gerris Swakopensis, Stal, Ofv. K.V. Ak. Forh. xv, 318—Tenagogonus 
Swakopensis, Stal, Hem. Afr. iii. 169. 
South Africa. 
23. GERRIS DIVERSA. 
Hydrometra diversa, Mayr, Reise Novara Zool. ii.; Hem. 169, f.52. Verh, 
Zool, Bot. Ges. Wien, xvi. 365. 
Cape. 
South Asia. 
24, GERRIS FOSSARUM, 
Cimex fossarum, Fabr. Syst. Ent. 727; Sp. Ins. ii. 375; Mant. Ins. ii.308 
—Gerris fossarum, Fabr. Ent. Syst. iv. 188. Wolff, Ic. Cim., iii. 118, 
pl. 12, f. 112—Hydrometra fossarum, Fabr. Syst. Rhyn. 258—Limno- 
gonus fossarum, Stal, Hem. Afr. i. 133. 
Hindostan. 
25. GERRIS DISCOLOR. 
discolor, Stal, Zug. Resa, 265—Limnogonus discolor, Stal, Ofv. K. V. Ak. 
Fork, xxvii. 705. 
China. Manilla. Tahiti. 
Div. 2. 
Tenagogonus, Stal, Ofv. K. V. Ak. Forh. x. 263. 
26. GERRIS FLUVIORUM. 
Gerris fluviorum, Fabr. Ent. Syst. Suppl. 543—Hydrometra fluviorum, 
Fabr. Syst. Rhyn. 257—Tenagogonus fluviorum, Stal, Hem. Afr. 
iii. 169—Limnometra fluviorum, Stal, Hem, Fabr, i. 132. 
Bombon. Tranquebar (according to Fabr.) 
