164 CATALOG DK OF 



4. Gerris ventralis. 



Hydrometra ventralis, Fieb. Eur. Hem. 107 — Hygrotrechus ventralis, 

 Stal. 



Greece. 



5. Gerris Cost*. 



Hydrometra Costa?, H.-Scli. Wanz. Ins. ix. 71, pi. 300, f. 927. Fieb. Eur. 

 Hem. 107 — Hydrometra rufoscutellata, Costa, Cent. ii. pi. 2, f. 8 — 

 Limnotrechus Costae, Stal. 



Middle and South Europe. 



6. GEBRI3 thoracica. 



Gerris thoracica, Schum. Beitr. ii. 46. H.-Seh. Norn.' Ent. 63 — Gerris rufo- 

 scutellata, Curt. Brit. Ent. xii. 553 — Hydrometra thoracica, H.-Sch. 

 Wanz. Ins. ix. 67, pi. 30 1 , f. 928. Flor. 'llhyn. Liv. i. 739. Fieb. Eur. 

 Hem. 108. Dougl. and Scott, Hem. 562 — Limnotrechus thoracicus, 

 Stal. 



a, b. France. 



7. Gerris lateralis. 



Gerris lateralis, Schum. Plot. 39, pi. 3, f. 12; pi. 13—15 — Hydrometra 

 lateralis, Fieb. Eur. Hem. 108. H.-Sch. Wanz. Ins. ix. 74, pi. 2, f. 9 



— Limnotrechus lateralis, Stal. 



Germany. 



8. Gerris aspera. 

 Hydrometra aspera, Fieb. Eur. Hem. 108 — Limnotrechus asper, Stal. 

 Bohemia. Galicia. 



9. Gerris gibbifera. 



Gerris gibbifera, Schum. Beitr. ii. 41, pi. 3, f. 5 — 7 — Hydrometra gibbi- 

 fera, J/.-Sch. Wanz. Ins. ix. 72, pi. 301 , f. 929. Fieb. Eur. Hem. 108. 

 Dougl. and Scott, Hem. 561 — Limnotrechus gibbifer, Stal. 



Europe. 



10. Gerris lacustris. 

 -, Geoff r. Ins. i. 463. Stoll, Pun. 42, pi. 9, f. 63. Deg. Ins. 



iii. 311 — Cimex lacustris, Linn. Faun. Suec. 970; Syst. Nat. 2732. 

 Tign. Hist. Nat. Ins. iv. 283— Hydrometra lacustris, Fabr. Si/st. Rhyn. 

 256. H.-Sch. Wanz. Ins. ix. 73, pi. 301 , f. 930. Burnt. Handb. Ent. 

 ii. 210. Flor. llhyn. Liv. i. 742. Jlnnb. Faun. And, ii. 185. Fieb. 

 Eur. Hem. 109. Dougl. and Scott, Hem. 566 — Gerris lacustris, Lair. 

 Gen. iii. 134. Schum. Beitr. ii. 43, pi 3, f, 11. Blanch. Hist. Nat. 

 Ins. iii. 98 ; Hem. pi. 1 , f. 6. Serv. Hist. Hem. 417 — Gerris variabilis, 

 Curl. Brit. Ent. xii. 553. 



a, b. France. 



