1898.] 229 



769. Lib. viridi inaurata ; pedibus iiigris. 



Descript. : Prsecedentis simillima, sed alia. Mas cauda quadridentata, dentibu8 

 superioribus pilosis inferioribus singulis duplicis denticulo. Feminse cauda foliolis 

 2 lanceolatis ; caput, thorax, abdomine cupreo inaurata, thorax pilosus absque 

 maculis. Abdomen subtus hinc inde pallide albescens. 



Here and elsewhere I have omitted words in the " descriptions " 

 that do not specially concern the question at issue. 



No. 768 applies to what we now term " Somatochlora Jiavomacu- 

 lata" and 769 (admirably) to " Gordulia ceneay But as no specific 

 terms were given in this work, the nomenclature is not immediately 



concerned. 



Ststema Naturae, ed. x (1758), p. 544. 

 csnea. 8. L. thorace aeneo viridi. 



And then is added as a reference — 

 Fn. Suec. 768, 769. L. thorace viridi, nitido, lineis flavis. 



The specific name is here applied for the first time. The former 

 two species are united, the term " aeneo " appears in the diagnosis, and 

 the words " lineis flavis " in the reference seem to be apologetic and 

 considered necessary in the altered conditions. 



Fatjis-a Suecica, ed. ii (1761), p. 373. 

 1466. L. cBiiea thorace seneo-viridi. 



With a reference to ed. i and quotation from No. 768. Then 

 follows the description, which is practically the same as in ed. i. 

 fi. L. viridi-inaurata ; pedibus nigris. Fn., 759 (a printer's error for 769). 



The description is again practically as in ed. i (769). 



Here is a new departure. The type form is our " Somatochlora 

 Havomaculata" and the unnamed var. y8 is " Gordulia cenea " .' 



Systema NATURiE, ed. xii (1767), p. 902. 

 anea. 8. L. thorace aeneo-viridi. Fn. Suec, 1466. 



Then follows a reference to Fn. Suec, i, 768, 769, with the same 

 quotation as in S. N., ed. x. 



It results from the above that if the dei ailed descriptions in the 

 " Fauna," ed. ii, of L. cenea were considered literally, it would be ab- 

 solutely necessary to apply the specific name to the " Somatochlora" 

 and to find or coin a new one for the " Cordulia.''' But the Syst. Nat. 

 ed. X, is now considered the starting point for zoological nomenclature, 

 and Linne there united both species under the same name " cdnea,'' 

 80 I think we can conveniently be spared the intolerable nuisance 



