TO INDIAN CARCINOLOGY. ill 



Genus Diogenes, Dana. 



Great contusion exists as to tlie nomenclature of the commonest and longest known 



members of this genus. I have tlierefore drawn up in tabular form liclow, a synopsis of 



the species descril)ed by last-ceutui-y writers, arranged according to order of publication, 



and showing the probable interpretation of each, or the name which tlie species now bears. 



Linnaeus, 1767 Cuacer Dioyeaes Probably several species included under 



Syst. Nat. torn. i. pars 2. tliis name. 



Fabricius, 1775 Pat/urus Dioi/cnes Description copiiMl from Liunteus. 



Syst. Ent. 



Fabricius, 1787 Pagarus Dio(jeiies .. Species unrecognizable, pcrha])s a 



Mantissa Insect, torn. i. Pagurus *. 



Pugurus iiii/cs D. miles ( M erbst) . 



Fabricius bad evidently seen the 

 then unpnblislied figure of Ilerbst, 

 for he lel'crs the species to Cancer 

 iuiles, Ilerbst. 



Uerbst, 1791 1 Cancer Diogenes J). Diogenes (Herbst). 



Naturges. Krabben u. Krebse, 

 Bd. ii. Heft 1. 



Cancer miles D. miles ( H erbst) . 



Fabricius, 1 793 Pagurus Diogenes Species unrecognizable. 



Eut. Syst. torn. ii. 



Pagiirnx miles D. miles ( Herbst) . 



(Both the al)ove arc copied from the 

 ' Mantissa Insectorum.') 



Fabricius, 1798 Pagurus Diogenes Species luirecognizable. 



Suppl. Ent. Syst. 



Pagurus miles Probably D. Diogenes (Herbst). 



Pagurus cnstos Probably D. custos (Fabr.), ^lilue-Edw. 



Pagrtrus diaphanus D. miles { Herbst) . 



The first writer to definitely characterize any of the species is Herbst, and on Taf. xxii. 

 of his Avork he gives clear and unmistakable figures of two of tlie commoner forms, which 

 I shall redescribe in the following pages as Diogenes Diogenes % (Ilerbst) and B. miles 

 (Herbst). The short diagnoses of Fabricius, published four years earlier in the 'Mantissa 

 Insectorum,' were probably intended to characterize the same species, and in the case of 

 the second, viz. Fagurns miles, Fabricius makes refercace to the then unpublished figure 

 of Herbst. In tlie ' Supplementum Entomologise Systematicae,' published seven years after 

 Herbst's description of the two above-named species, confusion is apparent — Herbst'sC«»cer 



* De Haau referred this species to P. usjiersus, Berthold. 



t Herbst's work appeared iu parts published between I 7S2 and 1 ">0 1 : the date j^iveti is tliut of the part in which 

 the two species of Diogenes are described. 



t Identical generic and specific names are perhaps objectionable, but the other altsrnative, of changing a long- 

 estabKshed specific name because it lias at some later period been adopted for the genus, ai)pears to me still more objeo- 

 tiouable. The latter plan was adopted by Dana iu the Pagurida;, and his species CUhanarins vulgaris and Anicuhis 

 li/iticus should, in my opinion, stand as Qlihaiuirius ciOamriun (Horbst) and Anlculus aniculus (Fabr.). 



