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wishes of the author of the genus. This has been the result 

 particularly with the work of Fabricius where his earelessiiess 

 in the inclusion of extraneous forms has resulted in such 

 extraneous forms l)eing made types of his genera. Such a 

 case is that of Prosopis and Hylaeus. The type fixation here 

 has not been recent but it has been disregarded until recently 

 and the change of names so forced upon us is far from pleas- 

 ant. But it seems to me tbat instead of grieving over our 

 wounds and delaying the acceptance of necessary changes we 

 should hasten the process of type fixation and be done with the 

 whole unpleasant business. Recent investigations on my part 

 of the status of several of the older names in the bees has thor- 

 oughly convinced me that no possible stability in nomenclature 

 can be secured without a thoroughgoing acceptance of the prin- 

 ciple of a single type for every genus and family. Such re- 

 searches are entirely out of the reach of most of us who have 

 not free and continuous access to the larger entomological 

 libraries, and it is to be hoped that those who have such oppor- 

 tunity will hasten the completion of this work. More than 

 this, it seems to me that the next revision of our nomeuelator- 

 ial code should further clarify our rules regarding type 

 fixation and an important addition made which w-ould refu-se 

 to recognize any subsequently formed genera for which no 

 type is established upon publication. 



Hylaeus Fabricius, whatever the original intention of the 

 author, (as has been recently called to our attention b}' ]\Iorice 

 and Durrant) was fixed as the pro]ier name for the bees which 

 all more recent authors have called Prosopis when Latreille in 

 1802 fixed Apis annulata Linne as its type. Whether we accept 

 the Elangen list or not, the type of Prosopis "Jurine" of that 

 list (1801) is congeneric with the type of Hylaeus and that of 

 Prosopis Fabricius (1804) is identical with that of Hylaeus. 

 There is no escape then from sinking Prosopis and reviving 

 Hylaeus even if Fabricius, as nearly as he ever came to recog- 

 nizing genera, wished to make Hylaet(S=HaJiclus and to give 

 the name Prosopis to the bees so long known under that name. 



