OF WASHINGTON. 209 



flavolineatus (Gerris) Champion, 1898, Biol. C.-Am., Hem.-Het., n, 



pp. 145, 149, pl. 9, figs. 13, 133, 14, 15. 

 Habitat: Mexico; Guatemala; Ecuador. 



gillettei (Gerris) Lethierry et Severin, 1896, Cat. Gen. Hem., in, p. 60. 

 productus (Limnotrechus) Uhler, 1895, Bui. Colo. Agr. Exp. Sta., 



31, p. 61 (preoc.). 

 Habitat : Colorado. 

 mexicanus (Gerris) Champion, 1898, Biol. C.-Am., Hem.-Het., n, pp. 



145, 147, pl. 9, fig. 10. 

 Habitat : Mexico. 



marginatus (Gerris) Say, 1832, Descr. Het. Hem., p. (Fitch re- 

 print, p. 807) ; 1859, Compl. Wtgs., I, p. 362. 



Habitat : Ontario ; Quebec ; Maine ; Connecticut ; New York ; New 



Jersey; Pennsylvania; District of Columbia; Virginia; North 



Carolina; Illinois; Michigan; Missouri; Kansas; Colorado; 



Oregon. 



remigis (Gerris) Say, 1832, Descr. Het. Hem., p. (Fitch reprint, p. 



806) ; 1859, Compl. Wtgs., i, p. 362. 



Habitat: Ontario; Maine; New York; New Jersey; Pennsylvania; 

 Maryland; Illinois; Michigan; Texas; Colorado; Arizona; 

 Oregon ; California ; Mexico ; Guatemala. 

 orba (Gerris) Stal, 1859, Eugenie's Resa, Ins., p. 264. 



Habitat: Oregon; California. 

 robustus (Hygrotrechus) Uhler, 1871, Silliman's Amer. Journ. Sci., p. 



105. 

 Habitat: Arizona; California; Baja California; Mexico. 



Genus 2. TENAGOGONUS Stal. 



1853, Ofv. Vet.-Ak. Forh., x, p. 263. 



Limnometra Mayr, 1865, Verh. zool.-bot. Ges. Wien, xv, p. 444. 



opacus (Limnometra) Champion, 1898, Biol. C.-Am., Hem.-Het., n, p. 



150, pl. 9, figs. 16, i6a. 

 Habitat : Costa Rica ; Panama. 



quadrilineatus (Limnometra) Champion, 1898, Bicl. C.-Am., Hem.- 

 Het., n, pp. 150, 151, pl. 9, fig. 17. 

 Habitat: Mexico; Costa Rica; Nicaragua; Brazil. 



Genus 3. LIMNOPORUS Stal. 

 1868, 6'fv. Vet.-Ak. Forh., xxv, p. 395. 



rufoscutellatus (Gerris) Latreille, 1807, Gen. Ins., in, p. 134; Herrich- 



Schaffer, 1850, Wanz. Ins., ix, fig. 924. 



Habitat : British Columbia ; Ontario ; Quebec ; New York ; New 

 Jersey; Pennsylvania; Illinois; Michigan; Wisconsin; Colo- 

 rado; Oregon. 



