[343] THE TENTHREDINOIDEA 83 



or more in number, will appear in the Proceedings of the 

 Washington Academy of Sciences, and later in the final report 

 of the Harriman Expedition. The systematists who have the 

 various groups in hand are as follows : 



Arachnida .... Nathan Banks. Diptera D. W. Coquillett. 



Myriopoda . . . . O. F. Cook. Lepidoptera . . . . H. G. Dyar. 



Thysanura .... Justus W. Folsom. Apoidea Wm. H. Ashmead. 



Neuropteroids . . Nathan Banks. Sphegoidea and 



Odonata R. P. Currie. Vespoidea . . . Trevor Kincaid. 



Aphididae .... Th. Pergande. Formicoidea . . . Th. Pergande. 



Psyllidae E. A. Schwarz. Parasitic Hymenop- 



Jassidae tera Wm. H. Ashmead. 



Heteroptera . . . O. Heidemann. Tenthredinoidea . Trevor Kincaid. 



Orthoptera . . . . A. N. Caudell. Life-histories of 



Coleoptera . . . . E. A. Schwarz. Coleoptera . . . Trevor Kincaid. 



The collection of sawflies upon which the following report 

 is based was gathered by the writer while with the Harriman 

 Expedition in Alaska, and consists of about 350 specimens, 

 representing 56 species, of which a considerable number are 

 believed to be new to science. 



Very little is known concerning the sawflies of Alaska, only 

 seven species having been recorded from this great Territory. 

 In 1822 Eschscholtz 1 described four species from Unalaska ; in 

 1872 Norton 2 recorded a variety of Dolerus similis from the 

 Yukon; in 1880 Cresson 3 described a form of Trichiosoma 

 triangulum from the Aleutian Islands ; in 1894 Harrington 4 de- 

 scribed a Tenthredo from Fort Wrangell, and in 1896 Marlatt 5 

 recorded a species of Pachynematus from the same locality. 



It is clear that hardly a beginning has been made towards 

 bringing to light the insect fauna of this vast and peculiar 

 region, except perhaps in the Coleoptera, which were carefully 

 collected by the Russians. Among the sawflies we may expect 

 an especially rich series of Nematidae owing to the immense 

 abundance, both in species and individuals, of various kinds of 

 willows. 



1 Eschscholtz, Entomogr., 1822. 

 'Norton, Trans. Amer. Ent. Soc., rv, p. 82, 1872. 

 'Cresson, Trans. Amer. Ent. Soc., vin, p. I, 1880. 

 4 Harrington, Can. Ent., xxvi, p. 194, 1894. 

 6 Marlatt, Monog. Nemet., p. 109, 1896. 



