19 



HALIPLIDJE. 



G. R. Crotch. — Eevision of the Dytiscidse of the TJuited States. 

 <Traas. Amer. Entom. See, Vol. IV, 1872-'7.3; Haliplides, pp. 

 383-385. 



DYTISCID^. 



G. R. Okotch.— [Work just cited; Dytiscides, pp. 385-i24.] 



David Sharp. — On aquatic carnivorous Ooleoptera or Dytiscidse. 

 <Trans. Eoyal Dublin Soc, 1882, Ser. 2, Vol. II, pp. 179-1003, 

 plates. 



A monograph of the Dy tiscidse of the whole world. 



GYRINID^. 



John L. Le Conte. — The Gyrinidse of America, north of Mexico. 

 <Proc. Ac. Nat, Sc. Phil., 1868, pp. 365-373. 



M. Regimbart. — Essai monographique de la famille des Gyrinides. 

 <Ann. Soc. Ent. de France, 1882-'83, with eight plates. 

 Treats of the Gyrinidse of the whole globe. 



HYDROPHILID^. 



John L. Le Conte. — Synopsis of the Hydrophilidse of the United 

 States. <Proc. Acad. Sc. Phil., Vol. VII, 1855, pp. 356-375. 



George H. Horn. — Revision of the genera and species of the tribe 

 drobiini. <Proc. Amer. Philos. Soc, 1873, pp. 118-137. 



silphid^. 



John L. Le Conte. — Synopsis of the Silphales of America, north of 

 Mexico. <Proc. Ac. Nat. Sc. Phila., Vol. VI, 1863, pp. 274-287. 



George H. Horn. — Synopsis of the Silphidse of the United States, 

 with reference to the genera of other countries. <Trans. Amer. 

 Entom. Soc, Vol. VIII, 1880, pp. 219-322, PI. V-VII. 



SCYDM^NID^. 



JohnL. Le Conte. — Synopsis of the Scydmaenidse of the United States. 

 <Proc Ac. Nat. Sc Phila., Vol. VI, 1854, pp. 149-157. 



PSELAPHID^. 



John L. Lb Conte. — On the Pselaphidse of the United States. <Bos- 

 ton Jonrn. Nat. Hist., Vol. VI, 1850, pp. 64 110. 



Emll Brendel.— Synopsis of the genera and species of the family Pse- 

 laphidse. <Proc. Ent. Soc. Phil., Vol. VI, 1866-7, pp. 31-38. 



