G. W. KIRKALDY. 155 



Subfamily 2.— GERRIN.E. 

 Genus 1.— Gerris Fabiicius, 1794, Eiit. Syst., iv, 188 ^ Hydrometra Fubiicius, 

 1803, Syst. Ehyng., 256 = Limnotrechus StSi. 1868, O. V. A. F., xxv, 

 395 (type fig. in H. S., Wanz. Ins., ix, f. 930). Type lacustris (L.).* 

 Type lacnstriM (Linn.), Fabr. 

 Subg. 1.— AQUARIUS Schellenberg, 1800, Cimic. 'H.v]v.. 25 = Ht/firoirechits 

 Stal, 1. c. (^^ canal) um Dufour). Type najas Stal (type fig. in 

 Scluimmel, Beitr. z. Ent., ii, pi. 4, f. 4, as aptera). Type palu- 

 dum Scliell. (= canaliicm Dufour). 

 Subg. 2.-TENAGOGONUS Stf.l, 1853, O. V. A. F., x, 263 = Lhnnometra 

 Mayr, 1865, Verb. zool. bot. Ges. Wieu., xv, 444 (minuta Mayr, fig. 

 in Mayr, Reise Novara Hem., f. 54). Type femorata Mayi-. ■■ 

 Type albovittatus Stal, 1855. 

 Subg. 3.— LIMNOPORUS Stal, 1868, O. V. A. F., xxv, 395 (type fig. in H. 

 S., Wanz. Ins., ix, f. 924). Type rufoscutellata (Latr.), Stal. 

 Subg. 4.— LIMNOGONUS Stal, 1868, Svensk. Vet. Ak. Forb., xii, 132 

 (type fig. in Champion, B. C. A. Het., ii, pi. 9, f. 18) = Lampro- 

 trechus Renter, 1882, Ofv. Fin,sk. Vet. Forh., xxv, 40. Type 

 leptocera Renter Type hyalina (Fabr.), Stal. 

 Genus 2.— EotrecliUS Kirkaldy, 1902. Entom.. 137 (type fig. in Distant, Faun. 



Brit. Ind. Rb., ii, f. 1.30). Type kaliflasa Kirkalriy. 

 Genus 3.— Oiiychotreclius Kirkaldy. 1903. Entoni., 44 (type fig. in Distant, 



op. c, f. 131 1. Type rhexeiior Kirkaldy. 

 Genus 4.— Cylindrostelhus Fieber, 1860, Eur. Heni., 33 (type fig. in Mayr 

 Reise Xovara, f. ) =: \\ Hi/drobaies Ericbson. 1848, in Sclioinbuigk 

 Faun. Brit. Guiana, iii, 614. Type linearis EricliPon ierythropiis \ii 

 fig. in H. S., Wanz. Ins., ix, f. 923i. Type fieheri Mayr, 1865 ( = 

 producfa Spinola). 

 Genus 5.— Plilomera Amyot & Serville. 1843, Hem., 413. Type lalicaiida 



Am. & Serv., pi. 8, f. 3 (= Inticaudnta Hardwicke). 

 Genus 6.— Hf lerobates Biancbi, 1896, Ezbeg. Zool. Mns. Peteib., i, 74. Type 



dohrandii Biancbi. 

 Genus 7. — Hymeiiobales Uhler. 1894, P. Z. S. Lond., 2j^KType imitator 



Uhler. 

 Genus 8.— Metrobates Ubler, 1873. Proc. Bost. Soc. N. H., xiv, 108. Type 



hesperiiiM Ubler. 

 Genus 9.— Plalygerris F. B. White, 1883, Ent. Mo. Mag., .\x. 36 i type fig. in 

 Cbara[iion, B. C. A. Het., ii, pi. 9, figs. 23-24:. Type depressa 

 White. 

 Genus 10.— Potamobales Champion, 1898, B. C. A. Het., ii, 154. Type 



uiii<lenlatus Champion, pi. 9, f. 20. 

 Genus 11. — Brachynietra Mayr, 1865, Verii. zool. bot. Gts. Wien., xv, 445 

 (type fig. in Mayr, Reise Novara Hera., f. 55). Type albiiiervus 

 A. &S.), Mayr. " 

 Genus 12.— Cliarmatomelra Kirkaldy, KS99, Ann. Sou. Ent. Belg., xlviii, 



509. Type bakeri (Kirk.), Kirk. 

 Genus 13.— Teliiiatobates Berg, 1898, Comun. Mus. Nac. Buenos. Aires, i, 4. 



Type boiiaireiisis Berg. 

 Genus 14.— Trepobatopsis Champion, 1898, B. C. A. Het., ii, 157. Type 



denticoriiis Champion, pi. 9, f. 26. 

 Genus 15.— Kallistomelra Kirkaldy, 1899, Ent., xxxii, 28. Type taylori 

 Kirkaldy. 



TBANS. AM. ENT. SOC. XXXII. JUNP:. 1906. 



