158 PROC. ENT. SOC. WASH., VOL. 23, NO. 7, OCTOBER, 1921 



16. (Banchus) Acroricnus aequatus (Say). 



Banchus aequatus Say, Boston Journ. Nat. Hist., vol. 1, 1835, p. 247 (Leconte 



ed., vol. 2, p. 701). 



Atractodes cloutieri Provancher, Nat. Can., vol. 6, 1874, p. 150. 

 Linoceras cloutieri Provancher, Nat. Can., vol. 11, 1879, p. 110. 

 Agathobanchus aequatus (Say) Ashmead (name but not description), Proc. U. S. 



Nat. Mus., vol. 23, 1900, p. 97. 

 Exetastes (?) aequatus (Say) Viereck, Trans. Kans. Ac. Sci., vol. 19, 1905, p. 303. 



Ashmead's determination of aequatus, and probably the speci- 

 mens from which he drew his description of Agathobanchus, is 

 obviously wrong when these specimens are compared with Say's 

 description of aequatus. From Say's description of the areolet 

 his specimen was obviously cryptine. 



A male of Acroricnus clouteri (Provancher) in the National 

 Museum agrees except in minor details with the description, 

 and we have no hesitation in synonymizing cloutieri with 

 aequatus. 



Neotype. A male specimen without data. 



Agathobanchus Ashmead, although based on a mistaken 

 determination of Say's species, still has that species as type and 

 is synonymous with Acroricnus Ratzeburg, the synonymy of 

 which is as follows: 



Genus Acroricnus Ratzeburg. 



Acroricnus Ratzeburg, Ichn. d. Forstins., vol. 3, 1852, p. 92. Genotype 



(Acroricnus schaumi Ratzeburg) = Cryptus macrobatus Gravenhorst. 

 Macrobatus Holmgren, Svensk. Vet. Akad. Handl., vol. 75, 1854, p. 50. Geno- 

 type. Cryptus macrobatus Gravenhorst. 

 Xenodocon Foerster, Verh. naturh. Ver. preuss. Rheinland, vol. 12, 1855, p. 237. 



Genotype. Xenodocon ruficornis Foerster. 

 Linoceras Taschenberg, Zeitschr. Gesammten Natur., vol. 25, 1865, p. 105. 



Genotype. Cryptus macrobatus Gravenhorst. 



Osprynchotus Kriechbaumer, Ent. Nachr. Heft 4, 1878, p. 221 (not Spinola). 

 Agathobanchus Ashmead (of genotype, not of description), Proc. U. S. Nat. 

 Mus., vol. 23, 1900, p. 97. Genotype. Banchus aequatus Say. 

 The specimens that Ashmead left in the National Museum determined as 

 Banchus aequatus Say and apparently the ones from which he drew his descrip- 

 tion of Agathobanchus are banchine. Bradley redescribed both genus and 

 species, but did not note the differences between it and the aequatus of Say. 

 Viereck, however, noted the differences and renamed aequatus Ashmead as 

 bradleyi, but retained it in Agathobanchus. Morley has synonymized Agatho- 

 banchus (of the description, not of the genotype) with Agathilla Westwood, 

 in which he is undoubtedly correct, and also doubtfully synonymized aequatus 

 \N\t\\fulvopicta Westwood. There can be no doubt of the specific distinctness 

 of the two species. 



The synonymy of Agathilla Westwood and of Agathilla bradleyi (Viereck) 

 are therefore as follows: 



