Catalogue of the described species of TENTHREDINID^, and UEOCERID^, 



inhabiting North America. 



I5Y K. 'I'. CUKSSON. 



The compilation of a catalogue of the described species of North Amer- 

 ican llymenoptera, on the same plan as ^IcIsJicimc/a (^tlcopfira^ Oaten 

 Sacken's Dipte.ra, and Morris's Lr'jmlajjffra , is very much wanted, and 

 would be of great assistance to the student, as a bases to work upon. 



The descriptions of our Hymenoptera ai'e scattered through the Trans- 

 actions of learned Societies, Scientific Journals, Pamphlets and other pub- 

 lications difficult of access, and presenting a serious obstacle to any one 

 endeavouring to identify specimens. 



Therefore, as it is not certain when the expected work of M.- Saiissnre, 

 on the IL/mcnopteru of North America, will appear, I propose to publish 

 in the Proceedings of the Entomological Society, a series of Catalogues 

 of our species, commencing with the Saw-flies, and to continue on with 

 a list of the other families, as my time will permit, or until Saussure's 

 work appears. This plan will enable the student to commence operations 

 forthwith, and may also be the means of encouraging others to study and 

 collect. 



Many omissions will doubtless be found, owing either to the unaccessi- 

 bility of some publications, or to others having in some way escaped ob- 

 servation. 



I have not attempted to determine the conflicting synonymes, either gen- 

 eric or specific, but have merely given the names, with references to the 

 original descriptions, and where figured. 



The species within each genus, have been placed in alphabetical order, 

 so as to facilitate reference. 



All species marked simply " America, " or those of which the locality 

 is unknown, have been omitted. In a few instances, I have included 

 European species, as they have been found in this country; in such cases, 

 reference to the authority is given. 



I have considered it useful to include the species contained in Dr. 

 Harris's Catalogue of the insects of Massachusetts, many of which have 

 never been described, or have been so since, under other names, as may 

 be observed in the able paper of Mr. Edward Norton, on the genus AUan- 

 tus in the United States, published in the Journcd of the Boston Society/ 

 of NatnraJ History, 1860. p. 236. 



