The following paper on the Hymenoptera of Alaska, by William 

 Harris Ashmead, Assistant Curator, Division of Insects, U. S. Na- 

 tional Museum, was originally published in the Proceedings of the 

 Washington Academy of Sciences, vol. iv, pp. 117-274, May 29, 

 1902. It is here reprinted from the same electrotype plates, so that it 

 may be quoted exactly as if it were the original. The original pagi- 

 nation has been preserved and transferred to the inner or hinge side of 

 the page, where it is enclosed in brackets, thus [118] ; while the con- 

 secutive pagination of the present volume has been added in the usual 

 place. In the plates the original numbers and running headline, 

 slightly abbreviated, have been preserved [in brackets], while the 

 volume designation and serial plate numbers have been added in the 

 usual place. The original text references to the plates are unchanged. 

 The present headpiece and title have been substituted for the running 

 heading of the Academy's Proceedings and the original title, which 

 was : Papers from the Harriman Alaska Expedition. XXViii. 

 Hymenoptera. No other alterations have been made. 



The author desires to record the following corrections : 



Page 124 [118], twelfth line from top, ' Schmieds-knecht ' should read 



Sckmiedeknecht. 

 Page 126 [120] : 



First line in table, change ' 12 ' to /j", and ' 17 ' to ^o. 

 Tenth line in table, for ' Mimisa ' read Mimesa. 

 Sixth line from bottom of table, change both numerals ' 1 1 ' to 10. 

 Page 127 [121] : 



Twentj-second line from top of table (numerals opposite ' Ecthrodoca'), 



change ' 2 ' to /, and ' 3 ' to ^. 

 Between ' Spanoctecnus ' and ' Dallatorrea ' (thirty-first and thirty-second 



lines from top), insertEclyius i [new], and i [total]. 

 Twentieth line from bottom, for * Microplectus ' read Microplectron. 

 Page 128 [122] : 



Fourth line in table, for ' Enizemon ' read Enizemum. 



Fifth line in table, numerals after ' Homotropus ' ; change ' 2 * in both 



columns to /. 

 Nineteenth line in table, for ' Enicospelus ' read Enicospilus. 

 Last line in table, change numerals after ' Cephaleia ' in both ' old ' and 

 ' total ' columns from ' 2 ' to /. 

 Page 129 [123] : 



Sixth line from bottom of table, change numerals after ' macrophya ' from ' 2 ' 



to /. 

 Fifth Jine from bottom of table, change numerals after ' Tenthreda ' from ' 13 ' 



to 12. 

 Fourth line from bottom of table, for ' Allanthus ' read Allantus. 

 Last line in table, change ' 134 ' to /jj, ' 201 ' to 210, and ' 335 ' to 333. 

 First line beneath table, change ' 183 ' to 184. 



(120) 



