234 BULLETIN 2 00, UNITED STATES NATIONAL MUSEUM 



MEGACRONUS Stephens— Continued 

 Homonyms by misidentification : 



Megaceonus of Stephens, 1829, paLrt=Bryopo7US. 

 Megacrontts of Thomson, lS59~Cart)hacis. 

 MEGALINUS Mulsant and Key, 1877b, p. 261. 



Genotype: Megalinus glabratus (Gravenhorst) (Staphylinus). 



Fixed by : Mulsant and Hey, 1877b, p. 261, by monotypy. 



Later citations: M. glabratus (Gravenhorst), by Blackwelder, 1943, p. 473; 



by Tottenham, 1949b, p. 370. 

 Synonymic homonyms : 



Megalinus Mulsant and Rey, 1877c, p. 45. 

 Synonyms : 



Idiolinus Casey, 1906, p. 375. [Subgenus.] 

 Hypnogyra Casey, 1906, p. 394. [Subgenus.] 

 Metacyclinus Reitter, 1908a, p. 115. [Isogenotypic] 

 MiLiCHiLiNUs Reitter, 1908a, p. 117. [Subgenus.] 

 Typhlolinus Reitter, 1908a, p. 122. [=^Idiolinus.'\ 

 Variant spellings : 



Megalinus Wu, 1937, p. 337. 

 Notes : This is the genus previously known as XanthoUnus. This name is 

 chosen from among the subgenera and synonyms of the old name 

 XanthoUnus to replace it, because of the latter's removal to Oyrohypnus. 

 Metacyclinus has been listed as another subgenus, but its genotype is the 

 same as that of Megalinus. 

 MEGALNUS [Error for Megalinus]. 



MEGALOCEPHALOBIUS Bernhauer, 1929a, p. 146. [Subgenus of Orphnebius.} 

 Genotype: Megalocephalobivs falagrioides (Bernhauer) (Orphnebius) . 

 Fixed by : Blackwelder, here, by subsequent designation. 

 Synonyms: {See Orphnebius) . 

 Variant spellings : 



Megabocephalobius Cameron, 1946b, p. 691. 

 MEGALOGASTRIA Bernhauer, 1901d, p. 437. [Subgenus of Aleochara.] 

 Genotype: Megalogastria cingulata (Eppelsheim) {Aleochara). 

 Fixed by : Bernhauer, 1901d, p. 437, by monotypy. 

 Later citations : M. cingulata (Eppelsheim) , by Fenyes, 1918, p. 23. 

 Synonyms : { See Aleoch ara ) . 

 MEGALOPINUS Eichelbaum, 1915, p. 104. 



Genotype: Megalopinus caelatus (Gravenhorst) {Oxyporus) . 



Fixed by: Eichelbaum, 1915, p. 104, through objective synonymy with 



Megalops, of which caelatus had already been fixed as genotype. 

 Synonyms : 



Megai.ops Erichson, 1839b, p. 30. [Objective. Not Lacepede, 1803.] 

 Peeostylus Benick, 1917, p. 190. [=Gata. Not Pilsbry, 1894.] 

 Stylopodus Benick, 1917, p. 190. [Subgenus.] 

 Megalopsidia Leng, 1918, p. 204. [New name for Megalops.] 

 AuLACOTRACHELtrs Benick, 1921, p. 1. [New name for Megalops.] 

 Megalopsidiella Bernhauer, 1933e, p. 333. [Subgenus.] 

 Gata Blackwelder, 1943, p. 202. [Subgenus. 'New name for Perostylus.] 

 Notes : The name of this genus has been clianged three times in recent years 

 because of homonymy. All these new names were unnecessary because 

 of the existence of an unpreoccupied new name prior to them all. 

 MEGALOPISIDIELLA [Error for Megalopsidiella]. 



