HEMIPTERA HETEROPTERA. 151 
Scop. Flor. et Faun. Insects, iii. 51, pl. 25, f. 8—Gerris vaga- 
bundus, Fabr. Syst. Rhyn. 262. Wolff, Icon. Cim. 203, pl. 20, 
f. 197. Burm. Handb. Ent. ii. 224 — Ploiaria vagabunda, Lair. 
Nouv. Dict, Hist. Nat. xviii. 183. Brull. Hist. Nat. Ins. ix. 
312. Blanch. Hist. Nat. Ins. iii. 100. Hem. pl. 2, f. 1—Ploearia 
vagabunda, Serv, Hist. Hem. 396. Fieb. Eur. Hem, 150—Ploiaria 
vagabunda, Dougl. and Scott, Hem, 536. 
a—i. England. From Mr. Stephens’ collection. 
2. PLoIARIA ERRATICA. 
Gerris erraticus, Mall. Hem. Suec. 164. H.-Sch. Wanz. Ins. ix. 118. 
Burm. Handb. Ent. ii. 224—Ploiaria erratica, Fieb. Eur. Hem. 149— 
Ploiaria erratica, Dougl. and Scott, Hem. 536. 
a—e. England. From Mr. Stephens’ collection. 
f. England. Presented by J. C. Dale, Esq. 
8. PLoIARIA PALLIDA. 
pallida, Mtrz. Ann, Sci. Phys. Soc. Agric. Lyon. vii. 
Woodlark. 
Genus 14. BACTRODES. 
Bactrodes, Stal, Rio Jan. Hem. 80. 
1. BacTRODES BIANNULATUS. 
biannulatus, Stal, Rio Jan. Hem. 80. 
Rio Janeiro. 
Genus 15. MALACOPUS. 
Malacopus, Stal, Rio Jan. Hem. 80. 
1. MaLacoPpus CELLULARIS. 
cellularis, Stal, Rio Jan. Hem. 81. 
Rio Janeiro. 
STAGMIGRADI. 
Fam. 1. HYDROMETRID&, 
Hydrometride, Leach, Serv. Hist. Hem. 308—Limnobatide, Fieb. Eur. 
Hem. 32—Limnobatina and Limnobatide, Dougl. and Scott, Hem. 42 
—Hydrometida, Stal, Hem. Afr. iii. 166. Mayr, Novara Hem. 169. 
Genus 1. HY DROMETRA. 
Hydrometra, Fabr. Latr. St. Farg.et Serv. Schum. Brull. Blanch. 
Serv. Hist. Hem. 398—Limnobates, Burm. Handb. Ent. ii. 210. 
H.-Sch. Wanz. Ins. ix. 118. Fieb. Eur. Hem. 103. Dougl. and 
Scott, Hem. 575. 
