XXXli, '21] ENTOMOLOGICAL NEWS 27 



nearly contemporary that it seems well to accept the solution offered 

 and regard the paper as unpublished. It would seem that if Dr. Pack- 

 ard held this opinion he and the other authors must have- descril>ed 

 their material elsewhere or made other disposition of it. The current 

 nomenclature in the genera concerned might throw some light on the 

 matter, hut the Lepidoptera described in the paper are so few that we 

 can gather nothing from them. In the genera of the two species 

 described as new we have but one Alaskan specimen each, and these 

 can readily be placed under species named in 1841 and 1871 respectively. 

 We expect to adopt this opinion in preparing our catalogue of 

 Lepidoptera, but recognize the possibility suggested by Mr. Banks 

 that the later discovery of additional copies may make it necessary 

 to regard the paper as published. 



WM. BARNES, M.D., and A. W. LIXDSEV, PH.D., 



Decatur, Illinois. 



Chalybion Dahlbom not a Synonym of Sceliphron Klug. (Hym.) 



In a recent paper Ilutson (Trans. Amer. Ent. Soc., vol. 45, 1919, 

 p. 218) tabulates the blue mud-daubers of North America and places 

 them in the genus Sceliphron Klug, giving Chulybion Dahlbom as a 

 synonym. For the black and yellow mud-daubers he would use the 

 name Pelopucns Latreille. This change in the generic names for these 

 groups is most unfortunate because it is not only unnecessary but con- 

 trary to the Rules of the International Commission on Zoological 

 Nomenclature. Hutson defends his usage by reference to recommen- 

 dations k and H of the International Commission, but entirely over- 

 looks the designation of genotypes made by previous students. In 1810 

 Latreille designated as type of Pelopaeus the species spirifc.v and in 

 1S U 7 Bingham chose the same species as type of Scclif>hr<i. The 

 species spirife.v was included in the original account of both of the 

 genera and the type designations must be considered as valid. c\en 

 though Bingham did not follow certain recommendations (he violated 

 no rules] of the International Code. Sceliphron Klug and /V/o/u/n/.v 

 Latreille are isogt-mitypic and since Sceliphron has priority I.atreille's 

 name must fall as a synonym. The black and yellow mud-daubers are 

 therefore' Sceliphron and the blue mud-daubers Chalybion. The 

 synonymy is, briefly, as follows : 

 Sceliphron Klug (1801) Type. Sf>hc.r spirifc.r Linnaeus ( llinvhain 



1897). 



I'dopucits Latreille (1802) Type. Splu'.r .v/vY/'/V.r Linnaeus (Lat- 

 reille 1810). 



I'elopacits Patton, Hutson and others. 



Chalybion Dahlbom (1843) Type. Sphc.r cytinenin Linnaeus (Pat- 

 tun 188(1). 



Sceliphron Hutson. 



S. A. Rim \\ IK. I . S. National Must-urn. \Ya>hiiH't,.n. 1 >. C. 



