J. C. HUTSOX 219 



and he does not consider the shorter petiole of sufficient impor- 

 tance to justify separation. In this the writer agrees with Patton. 



Descriptions 



Sceliphron cyaneum Klug 



It has been found advisable to give only the more important references on 

 this species. 

 Sceliphron cyaneum Klug, Xeuschrift Ges. naturf. Freunde, Berlin, iii, 1801, 



561. 

 Pelopaeus cyaneus Lepeletier, Encycl. ]\Iethod., Ins., x, 1825-33. 

 Chalybion cyaneum Dahlbom, Hym. Eur., i, 1843, 21. 

 Pelopaeus {Chalybion) cyaneus Dahlbom, Hym., i, 1845, 432. 

 Pelopaeus caeruleus Lepeletier, Hist. Nat. Ins., Hym., iii, 1845, 320. 

 Pelopaeus caeruleus, Jones, Naturalist in Bermuda, 1859, 113. 

 Pelopaeus (Chalybion) caeruleus Saussure, Reise Novara, Zool., ii, 1867, 26. 

 Pelopaeus (Chalybion) californicus Sau-ssure, Reise Novara, Zool., ii, 1867, 26. 

 Pelopaeus Californicus Patton, Proc. Bost. Soc. Nat. Hist., xx, 1880, 379. 

 Chalybion caeruleum Patton, Proc. Bost. Soc. Nat. Hist., xx, 1880, 378. 

 Pelopaeus caeruleus Provancher, Natural. Canad., xiii, 1882, 12. 

 Pelopaeus caeruleus Provancher, Faun. Entom. Canad., H>Tn., 1883, 613. 

 Chalybion caeruleum Cameron, Biol. Centr.-Amer., Hym., ii, 1888, 25. 

 Chalybion (Pelopaeus) Californicum, Cameron, Biol. Centr.-Amer., Hym., ii, 



1888, 25. 

 Chalybion caeruleum Schwarz, Proc. Ent. Soc. Wash., i, 1890, 254. 

 Pelopaeus caeruleus Peckham, Wis. Geol. and Nat. Hist. Surv., Bull. 2, 1898, 



176, pi. ii, fig. 5; pi. x, figs. 1-3. 



Fernald's paper^ discussing the name caerulea of Linnaeus 

 and others, clearly shows that this name cannot be applied to the 

 species here considered, leaving cyaneum Klug as the first name 

 available. 



Types. — There is a specimen (seen bv Fernald in 1913) 

 from North America in the Berlin INIuseum bearing a label cya- 

 neus, stated by the authorities there to be in King's handwriting. 

 It is a small male, undoubtedly of this species. No specimens 

 in that collection were found which appear to have been labelled 

 by Dahlbom. At Lund are eighteen specimens, the first marked 

 "Chalybion caeruleum, Sphex Lin. Pelopaeus Pelet.cT' 9 New 

 York." This specimen is a male and it is to be inferred that 

 Dahlbom at the time of labelling this specimen was confusing it 

 with Chlorion caeruleum. This confusion has already been dis-. 

 cussed by Fernald.^ 



'Ent. News, xv, 117, 1904. 

 *See above. 



TRANS. AM. EXT. .SOC, XLV. 



