Vol. 35, pp. 7-10 March 20, 1922 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



FURTHER NOTES ON THE NOMENCLATURE OF 



NORTH AMERICAN JULIDAE AND 



NEMASOMIDAE. 



BY RALPH V. CHAMBERLIN. 



In a recent paper on The Julidae and Isobatidae in North 

 America pubhshed in these Proceedings (Vol. XXXIV, pp. 

 81-84), it was pointed out that all members of these families 

 thus far known from this country are identical with well-known 

 European forms. The nomenclature adopted for these forms 

 in that paper is in the main that which has been most commonly 

 used by European myriopodists ; but a further consideration 

 of types and literature shows that some changes in this nomen- 

 clature must be made. In the present paper these changes 

 and some additions to the synonymy are indicated. 



JULIDAE. 

 Diploiulus londinensis (Leach). 



1814. Julus londinensis Leach, Trans. Linn. Soc. London, XI, p. 378. 

 1886. Julus psilopygus Latzel, in Chalande, Contr. k la faune d. Myr. 



d. France. 

 1888 Julus luridus var. oedurus Latzel, op. cit., 2d list. 

 1905. Cylindroiulus londinensis var. psilopygus Latzel, Ribaut, Soc. 



d'Hist. Nat. Toulouse, 1905, p. 4. 



The types of this species, as indicated in the original description and con- 

 firmed after reexamination by Pocock (1900), have the last tergite prolonged 

 into a distinct, clubbed cauda or horn. They have the striae of the seg- 

 ments particularly numerous and close-set. This form, as pointed out by 

 Jackson (1915) and the Brade-Birks (1918), is the same as the rare tailed 

 form known on the continent as psilopygus Latzel and lurieus oedurus 

 Latzel which had been equated and listed as a variety of londinensis by 

 Ribaut (1905). Under the name Julus londinensis, Cylindroiulus londin- 

 ensis, or Diploiulus londinensis, most continental writers, such as Meinert, 

 Porath, Stuxberg, Attems and Verhoeff, have designated a much more 

 3— Peoc. Biol. Soc. Wash., Vol. 35, 1922. (7) 



