HOW TO KNOW THE INSEO^ 



107. Curculionldae . . . (317) The Typical Snout Beetles. Mouthparts 



elongated into a snout. Larvae weevils In seeds 

 and fruit. 



108. Platypldae Small family; make pinholes In. lumber. 



-109. Scolytldae (12) The Engraver-Beetles. Sm.all, mostly In cam- 

 bium of trees. 



XII Order STREPSIPTERA (Twisted-winged Insects) 



1. Stylopldae Small; parasitic In other Insects. 



XIII Order THYSANOPTERA (The Thrips) 



* (Insects of Uew York) 



1. Aeolothrlpldae. . . . Front wings strongly veined, female with saw-like 



ovipositor. 



2. Thrlpldae Front wings poorly caveloped, female with saw-like 



ovipositor. 



3. Merothrlpldae .... Small family; under bark. 



4. Phlaeothrlpldae . . . Front wings weakly developed, female without saw- 



like ovipositor. 



XIY Order CORRODENTIA (The Psocids and the Book Lice.) 



*( Insects of New York) 



1. Psocldae The Psocids. Wings much longer than body, on 



trees, fences, etc. Feed on lichens. 



2. Caeclllldae Tarsi 2 pointed; dlscoldal cell of wing open. 



3. lilyopsocldae In damp places, on lichens, etc. 



4. Mesopsocldae Tarsi 3- jointed. 



5. Lepldopsocldae. . . . Small family. 



6. Psylllpsocldae. . . . Found throughout the year. 



7. Psoqulllldae In old papers and books. 



8. Troglldae The death watch; In old papers. 



9. Llposcelldae In old books. 



XV Order MALLOPHAGA (The Biting Lice) 



1. l!enoponldae . 



2. Trlmenopanldae, 



*( Insects of New York, with modifications) 



. The common hen louse and ether bird lice, 



3. Rlclnldae . . . 



4. Laemobothriidae 



5. Gyropldae . . 



6. Phllotherldae 



. On rodents and marsupials. Only five pairs of ab- 

 dominal spiracles. 



. All tarsi t.TO-clawed. On humming and perching 

 birds. 



. All tarsi two-clawed. On birds of prey and on 

 water birds. 



. Found on guinea pigs and other rodents. 



. The largest family of biting lice. No maxillary 

 palpi. On birds. 



7. Trlchophllopteridae . On m.amrrials. 



8. Trlchodectldae. . . . Antennae tV'ree-segmented. On domestic and other 



mamm.als . 



122 



