OF THE DIURNAL LEPIDOPTEEA. 499 



tliis name for the bulk of the old genus Thecla, if the true type 

 of Thecla is Betults, now placed in the genus Dipsas of Doubleday 

 and Hewitson. Dipsas, including, as it does, Setulee and Quercus, 

 would then fall as a synonym of Thecla. But the true type of 

 Cupido appears to be Alsus, and it would be far more convenient 

 and quite justifiable to take Spini and not Betulce as the type of 

 Thecla. 



In 1805 Latreille published volume fourteen of his ' Histoire 

 Naturelle des Crustaces et des Insectes,' dividing the butterflies 

 thus : — 



Genus Nymphalis, A. NTMPHAtES, B. Sattri.— The Jason 

 group, which occupies the foi-emost place in the genus in all his 

 works, is certainly, as Prof "Westwood argues, the typical section. 

 Pelder argues that Nymphalis ought not to supersede Charaxes 

 of Ochsenheimer ; but if Ochsenheimer divided Nymphalis into 

 three genera without applying the name to either, it is certainly 

 better to reject Ochsenheimer's name of 1816 rather than La- 

 treille's of 1805. Felder applies the name Nymphalis to the 

 second group of species classed under the genus by Latreille in 

 the ' Encyclopedie M6thodique,' i. e. the genus Faphia, "Westw. 

 (nee Fabr.), which, however, it may be remarked, is a preoccupied 

 name. 



Genus Danaida. (Nom. prseocc.) Type, Pleccippus. — La- 

 treille afterwards changed this name to Danaus and Danais. His 

 reason for making the name feminine (viz. that most of the 

 specific names in it are feminine) is unsatisfactory, as this does 

 not apply to his typical group, to which the name is now re- 

 stricted. However, if the name Danaus should be restored to 

 Pieris, this genus will be supplanted by Euplcea, Fabr., and the 

 genus which now bears that name will take that of Trepsichrois, 

 Hiibn., as, of three species given as typical of Euplcea, Fabr., 

 the two first belong to Danais, auct., and only the third is a 

 Euploea, 



Genus Papilio. JSquites of Linnaeus. — Schrank, as we have 

 seen, had already applied this name to the Nymphalinae. 



Genus Paenassius. — A Fabrician section. But in the event 

 of Danaus being substituted for Pieris, it is doubtful whether the 

 name Pieris ought not to be applied to Parnassius, Schrank's 

 first section of his genus, and also the most homogeneous. 



Genus Pieius. — Eestricted to sectioua D and C of Schrank 

 (the modern Pierinsc). 



