136 



Key to Families of North American Insects. 



Sceliphron, 28 

 Scepsis, 53 

 Schizometopa, 67 

 Schizophora, 66 

 Schizopteridse, 77 

 Schizura, 52 

 Sciagraphia, 52 

 Sciapus, 66 

 Sciaridse, 63 

 Sciomyzidje, 70 

 Sciophila, 63 

 Schistoceros, SI 

 Scoliida;, 26 

 Scolops, 75 

 ScolytidiB, 40 

 Scopeumidffi, 69 

 Scraptiidse, 39 

 Scudderia, 14 

 Scutelleridse, 80 

 Scydmffinidse, 36 

 Semiotellus, 23 

 Sepedon, 70 

 Sepsis, 68 



Sericostomatidse, 47 

 Serphidse, 25 

 Serricornia, 32 

 Sesiidse, 49 

 Sessiliventres, 19 

 Setomorpha, 58 

 Sialididse, 44 

 Sierolomorpha, 27 

 Silphidffi, 36 

 Silvanus, 34 

 Silvius, 64 

 Simuliidse, 62 

 Sinodendridse, 41 

 Sinoxylon, 34 

 Siphonaptera, 72 

 Siphunculata, 18 

 Siricidse, 20 

 Sisyridse, 46 

 Sitodrepa, 34 

 Sitotroga, 56 

 Smicra, 23 

 Smicrips, 38 

 Sminthuridse, 83 

 Solenobia, 50 

 Sphaeriidte, 37 

 Sphseritidse, 35 

 Sphseroceridse, 70 

 Sphserophthalmus, 27 

 Sphecidse, 28 

 Spheciformia, 2 

 Sphecius, 28 

 Sphecodes, 29 

 Sphenophorus, 41 

 Sphindidse, 38 

 Sphingidse, 51 



Sphyrocephala, 70 

 Spermophagus, 40 

 Sphilochalcis, 23 

 Spilonota, 57 

 Spilosoma, 54 

 SpondylidfE, 40 

 Stachyocnemus, 80 

 Stagmotnantis, 16 

 Staphylinidse, 32 

 Staphyliniformia, 2 

 Statira, 38 

 Stegomyia, 62 

 Stelis, 30 

 Stenomidse, 58 

 Stenoxenidae, 63 

 Stenus, 32 

 Stephanidse, 21 

 Sterictophora, 20 

 Sternoxia, 2 

 Sthenopis, 49 

 Stigmus, 28 

 Stizidse, 28 

 Stobaera, 74 

 Stomoxys, 68 

 Stratiomyiidse, 63 

 Streblida;, 72 

 Strepsiptera, 41 

 Stylogaster, 69 

 Stylops, 42 

 Suctoria, 72 

 Symphasis, 45 

 Sympherobius, 45 

 Symphypleona, 83 

 Symphoromyia, 64 

 Symphyta, 19 

 SympiesLS, 24 

 Synchora, 39 

 Synergus, 22 

 Synistata, 45 

 Synteliidse, 33 

 Syntomidse, 53 

 Syrphidse, 66 

 Systropus, 65 



Tabanidse, 64 

 Tabuda, 65 

 Tachinida», 68 

 Tachyporus, 32 

 Tachysphex, 28 

 Tachytes, 28 

 Tanypezidse, 69 

 Tanypus, 63 

 Telamona, 74 

 Telea, 52 

 Teleas, 24 

 Telenomus, 24 

 Telephoridae, 36 

 Temnochilidse, 33 



Tenaga, 56 

 Tendipedidae, 63 

 Tenebrioides, 33 

 Tenebrionidse, 38 

 Tenthredella, 20 

 Tenthrediiiidae, 20 

 Tephritis, 70 

 Tephrochlamys, 68 

 Tephroclystis, 52 

 Terebrantia (Hym.), 19 

 Terebrantia (Thrips), 1& 

 Teredilia, 2 

 Terias, 60 

 TermitidiK, 17 

 Termopsis, 17 

 Tetanoceridse, 70 

 Tetracha, 31 

 Tetraopes, 40 

 Tetrastichus, 24 

 Tettigidse, 13 

 Tettigonidse, 14 

 Tettigoniidse, 74 

 ThamnotettLx, 74 

 Thanasinius, 35 

 Thaumatotj'pidea, 2L 

 Thecla, 60 

 Thelaira, 68 

 Theresia, 68 

 Therevidse, 65 

 Thripidse, 16 

 Throscidse, 33 

 Thyacophilidse, 47 

 Thyatiridse, 52 

 Thynnidse, 27 

 Thyreocoridse, 80 

 Thyridida;, 53 

 Thyridopteryx, 50 

 Thysanoptera, 15 

 Thysanura, 80 

 Tibicen, 73 

 Tineidae, 56, 58 

 Tineola, 58 

 Tingitidffi, 79 

 Tiphiidie, 26 

 Tipulidae, 62 

 Tischeriidse, 56 

 Tmetocera, 57 

 Tolype, 53 

 Tomicus, 40 

 Tomocerus, 83 

 Tomoxia, 39 

 Tortricidse, 57 

 Tortricidia, 50 

 Toyrmidae, 23 

 Toxoptera, 76 

 Tremex, 20 

 Trichiosoma, 2ft 

 Trichobius, 72 



