2 37 



Sitones tibialis 27, 184 

 Somatochlora albicincta 28, 150 

 Spania edeta 12 

 Sphaerophoria sulphuripes 7 

 Sphegina infuscata 4, 9, 14, 15, 18 

 Spirobolus hebes (66) 



uncigerus (67) 

 Spondylis upiformis 182 

 Stenus insularis 19, 179 



umbratilis 6, 179 

 Strigamia chionophila (73) 

 Strongylosoma eruca (57) 

 Syneta carinata 183 

 Syrphus amalopis 14, 18, 21 



contumax 11 



diversipes 14, 18, 21 



geniculata 26 



glacialis 11, 18 



gracilis 9 



macularis iS 



mentalis 21 



ribesii 6 



torvus 26 



velutinus 7 



Tabanus septentrionalis 27 

 Tachinus nigricornis 179 



sp. 179 

 Tachjcellus nigrinus 175 

 Taeniopteryx sp. 159 

 Telephorus divisus 8, 183 



fraxini 182 

 Telmatogeton alaskensis 19 

 Tenthredo bivittata 33 



dissimulans 26, 33 



erythromera 7, 16, 19, 23, 26 



evansii 16, 19, 23, 28 



ferrugineipes 5, 16, 23, 26, 28, 33 



flavomarginis 19, 23 



harrimani 33 



lineata 16 



melanosoma 16, 19, 23 



mellina 33 



nigricollis 16, 23, 26 



varipes 28 



varipicta II, 16, 19, 23, 26, 33 

 Tephroclistis flebilis 15, 223 



miserula 32 



miserulata 223 



Tephroclistis perfusca 32, 223 



zygamidata 223 

 Tetrads hyperborea 222 

 Tetragnatha extensa 42 



laboriosa 42 

 Tettigonia acuminata (131) 



6-notata (133) 

 Thamnotettix fasciifrons (133) 



ketus (133) 



lineatifrons (134) 

 Thereva melanoneura 27 

 Theridium marxi (38) 



fexpunctatum 38 

 Thyrcopus vicinus 26 

 Tibellus oblongus 43 

 Tipula cineracea 19 



gelida 6 



macrolabis 22 



septentrionalis 31 



strigata 6 



tenebrosa n 

 Titacis hyperborea 20 

 Tomoceras americanus 96, 97, 98, 99 



arcticus 96, 97, 9S-99 



celer (95) 



flavescens (95), 06, 97, 98 



lepida (95) 



niger 95-98, pi. x, f. 46-53 



plumbeus 9S 

 Tomotaenia chionophila 34, 73-74, 



77 

 Tortrix fumiferana 227 

 Trachodes ptinoides 184 



quadrituberculatus 184 

 Trechus chalybeus 31, 174 

 Trichalophus constrictus 184 

 Trichiosoma aleutiana 28 



triangulum 26, 33 

 Trichopetalum glomeratum (69) 

 Tricyphona diaphana II 



vitripennis 5 

 Trineura aterrima 11 

 Tylobolus 65 



deses 65-66, pi. in, f. 33-3^ 



hebes 66 



uncigerus 67 

 Typhlocyba carneola (134) 



commissuralis (135) 



pura (135) 



