120 



Views: Division of Entomology U. S. T>ept. Agric. 

 and Dept. Insects r\at. UIus. 



1. General view of insectary — south and east. 



2. General view of insectary — north and west. 



3. Interior view of insectary. 



4. Office of the Entomologist. 



5. North or main room Entomological Division. 

 , 6. South room of Entomological Division. 



7. Balcony of Entomological Division. 



8. Main room Department of Insects, U. S. National Museum. 



9. Library and work room, U. S. National Museum. 



Charts of I in porta nt Insects. 



1. Round-headed apple-tree borer; Flat-headed apple-tree borer; Cherry-tree 



borer. 



2. Yucca moth. 



3. Pronuba yuccasella. 



4. The Bagworm (Thyridopteryx ephemeratformis Steph.) 



5. Sarracenia moth (Xanthoptera semicrocea Guen.). 



6. Archippus butterfly (Dan a is archippus F.). 



7. Natural history of Limcnitis. 



8. The Colorado Potato-beetle (Doryphora 10 lineata Say). 



9. Sarracenia Flesh-fly (Sarcbpliaga sarracenia' Riley). 



10. The Chinch Bug (Micropus leucoplerus Say). 



11. Oyster-shell Bark-louse (Mytilaspis pomornm). 



12. Fall Canker-worm (Anisopteryx pometaria llarr.). 



13. Aldrovanda vesiculosa. 



14. Fluted scale on lemon trees in California. 



15. Bald-faced Hornet (Vespa maculata). 



16. Mytilaspis pomicorticis Riley. 



17. Transformations of the Mosquito (Culcx pipiens). 



Ordinal Charts with Illustrations. 



1. Order Hymenoptera. 



2. Order Lepidoptera. 



3. Order Diptera. 



4. Order Aphaniptera. 



5. Order Coleoptera. 



6. Order Strepsiptera. 



7. Order Hemiptera. 



8. Order Orthoptera. 



9. Order Euplexoptera. 



10. Order Neuroptera. 



11. Order Trichoptera. 



12. Order Thysanoptera. 



Maps Showing Range of Important Insects. 



1. Approximate Distribution of the Hessian Fly. Prepared by A. S. Packard. 



2. Point of Introduction and Subsequent Annual Spread of the Horn Fly {Hcema- 



tobia serrata). 





