I 



1890.] E. T. Atkinson— Catalogue of the Family DyiiaGidse. 129 



pachys. Dr. Sharp at first placed it amongst the Dyiiscidce, but subse- 

 quently agreed * with Dr. Horn that it should be removed from the 

 Dytiscidce and treated like Pelohius. 



Pelobius was also formed into a distinct group by Lacordaire who 

 remarks that * cette tribu ne comprend qu'un soul genre, mais qui ne 

 pent ^tre associe a aucun de ceux qui precMent ou qui suivent : ses 

 hanches posterieures le rattachent aux Haliplides, ainsi qui les tarses 

 de la m^me paire sont k peine plus natatoires,' and declares it to be 

 another of the aberrant genera connecting the Garahidce with the Dyiiscidce. 

 Describing the genus itself he gives it as • un Dytiscide pourvu 

 d'une t^te de Carabique.' Notwithstanding, therefore, the great authority 

 of Dr. Horn, it will, in the present state of our knowledge, be advisable 

 to retain Lacordaire's arrangement as that most convenient. Below 

 is given a list of some of the writings on the Dytiscidce of the Oriental 

 Region. 



Aube, C. : — 



Species general des Hydrocanfchares et Gyriniens pour fairs suite au Species 

 general des Ooleopteres de la collection de M. Le Comte Dejean, vi, Paris, 

 1838. 

 Blanchard, E. :— 



Voyage au Pole Sud sur I'Astrolabe^ Zool., iv, Paris, 1853. 

 Boheman, C. :— 



Kongliga Svenska Fregatten Eugenics resa, Col., Stockholm, 1858. 

 Clark, H. :— 



Transactions Entomological Society London, (3s) i, 1863, p. 413. 

 Erichson, W. F. :— 



Die K&fer der Mark Brandenburg, Berlin, i, 1837. 

 MacLeay. W. S. :— 



Annulosa Javanica, or an attempt to illustrate the natural affinities and analogies 

 of the insects collected in Java by Dr. T. Horsfield. London, 1825. 

 Motscliulsky, V. : — 



Etudes entomologiques, Helsingfors, iv, 1855 : viii, 1859. 

 Redtenbaclier, L. : — 



Hiigel's Kaschmir, iv (2), 1844. Stuttgard. 

 Regimbart, M. :— 



'Kecherches sur les organes copulateurs dans le genre Dyfiscus,' in Ann. See. Ent. 

 Fr., (5s.) vii, 1877, p. 263. 



Etude sur la classification des Dytiscides, I. c,, viii, 1878, p. 447. 



*Dytiscides de Birmanie', in Ann. Mus. Civ. Gen., (2s) vi, 1888, p. 609. 



Schaum and Kiesenwetter :— 



Naturges. d. Ins, Deutschl., i, ii, 1859-60, 



* Dytisc.,p. 974. 



R 



