696 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



There are more species of '"''N'ogagus'''' which are the males of Pan- 

 darus than of any of the other genera mentioned; hence we should 

 have the anomaly of two subfamilies — one founded on the females and 

 the other on the males — of the same genus. 



A second objection is found in the fact that both Gerstaecker and 

 Steenstrup and Liitken are obliged to separate their Nogagun males 

 into two groups on generic characters. If this means anything at all 

 it means that we have here two distinct genera under the same name, 

 and this confusion at least ought to be cleared up before the name is 

 used for the type of a subfamily. 



Finally, in the subfamily Nogagina, as constituted by Gerstaecker, 

 we find a heterogeneous medley of forms which manifestly do not 

 belong together. As already stated, many Nogagus species are the 

 males of Fandarus, while others belong to the genera Nesippus^ 

 Demoleus^ Echthrogaleus, and Dlnematura. This very resemblance of 



the males would suggest strongly that 

 these five genera belong to the same 

 subfamily. Further investigation 

 proves the truth of this suggestion, 

 and they must be classed with the 

 Pandarinae, as will be clearl}^ shown 

 under that family. 



But when you have removed these 

 five genera from Gerstaecker's Nog- 

 agina there is not a single species of 

 Nogagus left, and hence that name 

 must be dropped. Furthermore, of 

 the genus Dysganius, which Ger- 

 staecker includes in this same sub- 

 family, only the males have been thus 

 far examined. We can not be sure, therefore, whether this is 

 even a valid genus, and of course can not locate it with certainty 

 (see p. 712). The genus Trehkts^ also included by Gerstaecker in the 

 Nogagina, is classed by most authors with the CaliginfB. We have 

 chosen to place it by itself for reasons stated on p. 67U, but wherever 

 it may be placed it clearlj^ does not belong with '"''JVogagus.'''' These 

 eliminations reduce the ten genera which Gerstaecker included in his 

 Nogagina to three, and Nogagus is not one of the three. 



With these three are to be included Steenstrup and Lutken's 

 Gloiojpotes and Dana's CaVigerla^ Steenstrup and Lutken's Dysgamus 

 (provisionally), and the new genus Dissonus, making seven genera in 

 the subfamily. Steenstrup and Liitken*" have already separated this 

 group very clearly from the rest of the Caliginse but did not constitute 



ex. 



en. 



Fig. 18.— The mouth-tube and second max- 



ILLiE OF AN ADULT MALE OF ALEBION 

 GLABER. 



aBidrag til Kundskab om det aabne Havs Snyltekrebs og Lerneer, 1861, p. 11. 



