Results of the International Projects of the CESA on the World Lepidoptera - I. Cent. ent. Stud., Memoirs 3-4: v + 1-1989 pp. 49 Col. Plates. The first results of the twentyfour major scientific projects of the Centre for Entomological Studies Ankara (CESA) are presented. The Scientific research activities of the CESA are compiled under the following Project titles: (1) Diversity of the Lepidoptera in the World (DLW); (2) Researches on the animal- plant interaction: Foodplants of the Lepidoptera (FL); (3) Bibliography of the Lepidoptera (BL); Secondary Projects of the CESA: I- Faunas of Actual States: (4) Lepidoptera of Turkey (LTR); (5) Lepidoptera of the Philippines (LPH); (6) Lepidoptera of Thailand (LTH); (7) Lepidoptera of South Africa (LZA); (8) Lepidoptera of Uighur Ili (LUi); (9) Lepidoptera of Iran (LIR); (10) Lepidoptera of Ethiopia (LET); (11) Lepidoptera of Middle East (LME); (12) Lepidoptera of Indo-China (LIC); (13) Lepidoptera of Africa (LAF); (14) Lepidoptera of Orientalic Region (LOR); (15) Lepidoptera of Asia (LAS); (16) Lepidoptera of Old World (LOW); II- Faunas of Historical States: (17) Lepidoptera of Urartu (LUR); (18) Lepidoptera of Uighur State (LUI); (19) Lepidoptera of Gazne State (LGZ); (20) Lepidoptera of Seljuk State (LSE); (21) Lepidoptera of Cenghiz Khan Emperor (LCE); (22) Lepidoptera of Timur Emperor (LTI); (23) Lepidoptera of Eretna Sultanate (LER); (24) Lepidoptera of Ottoman Emperor (LOT). The first part of the results of the projects are published by various authors in the third and fourth volumes of the Cesaâs serial Memoirs. Aim and scopes of the projects are explained in the Chapter 1 Introduction. Some other foreign projects on the similar subjects are compared and discussed briefly. The project, The Diversity of the Lepidoptera of the World (DLW) is introduced. The results of the project The Diversity of the Lepidoptera in the World (DLW) are given in the Chapter 2 as synonymous list of the valid genus-group names (8251 valid taxa) and in the Chapter 3 as synonymous list species-group names (82189 valid taxa), in accordance with the current ICZN Rules. The temporary results of the project Bibliography of the Lepidoptera (BL) are given as the list of the publication used in the Cesa projects (7500 publications) in the Chapter 4. The original references to the genus- and species group names in the Lepidoptera have been preparing by the author within the project BL. Temporary result for more than 14500 taxa is published in Chapter 5 with their original references. Some results of the following projects are also mentioned and discussed under the following chapters: In Chapter 6, results of the animal-plant interaction: Food-Plants of the Lepidoptera (FL) (for 3950 lepidopterous taxa); in Chapter 7, one of the results of the Projects, Faunas of Actual States, is published entitled Illustrated list of the Lepidoptera recorded in the Transvaal (South Africa) (LZA) (2125 species); in Chapter 8, one of the results of the Projects, Faunas of Actual States, is published entitled Illustrated list of the Lepidoptera recorded in Uighur Ili (LUi) (1271 species); in Chapter 9, one of the results of the Projects, Faunas of Actual States, is published entitled List of the Lepidoptera recorded in Iraq (LAS) (1184 species); in Chapter 10, one of the results of the Projects, Faunas of Actual States, is published entitled List of the Lepidoptera recorded in Doi Inthanon (North Thailand) (LTH) (438 species); in Chapter 11, one of the results of the Projects, Faunas of Actual States, is published entitled Illustrated list of the Lepidoptera recorded in Chiang Dao (North Thailand) (LTH) (618 species); in Chapter 12, one of the results of the Projects, Faunas of Actual States, is published entitled Illustrated list of the Lepidoptera recorded in Chiang Mai University Campus (North Thailand) (LTH) (328 species); in Chapter 13, one of the results of the Projects, Faunas of Actual States, is published entitled List of the Lepidoptera recorded in Afghanistan (LAS) (1599 species); in Chapter 14, one of the results of the Projects, Faunas of Actual States, is published entitled Illustrated list of the Lepidoptera recorded in Iran (LIR) (3295 species); in Chapter 15, one of the results of the Projects, Faunas of Actual States, is published entitled List of the Lepidoptera recorded in the Philippines (LPH) (2337 species), and in Chapter 16, one of the results of the Projects, Faunas of Historical States, is published entitled Lepidoptera of Eretna Sultanate in Asia Minor (LER) (4067 species or subspecies).