870 Hymenoptera 



' Order HYMENOPTERA 



Edited by J, Chester Bradley 



The classification adopted for the order Hymenoptera is that devised by 

 Messrs. Rohwer, Bequaert, and Bradley, and employed by Professor Corn- 

 stock in his Introduction to Entomology. Departures from this classifica- 

 tion are minor, and consist chiefly in the division of the families Argidae 

 and Chalcididae into more than a single family each. Where the strict 

 application of the rules of nomenclature have compelled us, we have used 

 other names for certain groups than those employed in Professor Com- 

 stock's book, although it is to be hoped that a way may yet be found for 

 the retention of those old and well-known names. In all such instances 

 we have introduced both names, so that the student will not be misled or 

 puzzled. One serious source of uncertainty exists concerning these old 

 group names. Twelve years ago Messrs. Morice and Durrant published 

 a study of an old and forgotten paper which has since come to be known 

 as the "Erlangen List." It is expected that the International Commission 

 on Nomenclature will rule as to whether this paper is to be allowed to 

 affect our nomenclature. If so, numerous radical changes will occur, and 

 all of these, or at least the most important, have been indicated in foot- 

 notes in the present list. 



The present list may be looked upon as a fair representation of our 

 knowledge of the hymenopterous fauna of the State, but as falling very 

 far short of the actual fauna, particularly in certain groups. The saw- 

 flies, the gall-inhabiting cynipids, the Vespoidea, and the sphecoid wasps, 

 probably list a large proportion of the species which actually occur here, 

 but that can hardly be true of any of the parasitic groups. 



The user of this list who wishes to discriminate between genera and 

 species will encounter only one general manual. ^°^ In dealing with the 

 sawflies, the vespoid and sphecoid wasps, the ants, and to a lesser extent 

 the bees, this manual will be helpful, but it is not of much assistance in the 

 parasitic groups. Where there exist recent revisionary papers, these have 

 usually been referred to by footnote in connection with the appropriate 

 group. 



The list in each family that has not been credited to another compiler, 

 has been compiled by the editor for the order, who, with an editor's prerog- 

 ative, has modified the form of individual lists to conform to the general 



^*'® Guide to the insects of Connecticut. Part III. The Hymenoptera, or wasp-like insects, of 

 Connecticut. By Henry Lorenz Viereck, with the collaboration of Alexander Dyer MacGillivray, 

 Charles Thomas Brues, William Morton Wheeler, and Sievert Allen Rohwer. 1916. 824 p., 10 pi. 

 (State of Conn., Public document No. 47. State Geological and Natural History Survey, Bulletin 

 No. 22.) 



