1941

• Clench, H.K., 1941. Notes on two Bahaman Lycaenidae, with the description of a new subspecies. Torreia 7: 1–7. Reference page. 

1942

• Clench, H. K., 1942. A new Race of Atlides halesus Cramer from California (Lepidoptera: Lycaenidae). Entomological News 53(8): 219–221. Reference page. 

1943

• Clench, H. K., 1943. The Lycaenidae of the Bahama Islands (Lepidoptera: Lycaenidae). Psyche 49(3/4): 52–60. Reference page. 

• Clench, H.K., 1943. Two New Subspecies of Incisalia (Lepidoptera: Lycaenidae). The Canadian Entomologist 75(10): 182-185. Reference page. 

1944

• Clench, H.K., 1944. Notes on lycaenid butterflies. Bulletin of the Museum of comparative Zoology 94(6): 217–245 (July). BHL. Reference page. 

• Clench, H.K. 1944. New neotropical Theclinae (Lepidoptera, Lycaenidae). Journal of the New York entomological Society 52: 255–261. BHL. Reference page. 

1945

• Wind, R. G. & Clench H. K., 1945. Notes on the genus Thaumaina (Lepidoptera: Lycaeaidae). Pan-Pacific Entomologist 21(1):14-16. Reference page. 

1946

• Clench, H.K., 1946. Notes on the amyntor group of the genus Thecla (Lepidoptera, Lycaenidae). The Entomologist 79(998): 152–157 (12 July), (999): 185–191 (23 August). Reference page. 

1947

• Wind, R. G. & Clench H. K., 1947a. The genus Callictita (Lepidoptera: Lycaenidae) Psyche. 54: 57-61. Reference page. 

• Wind, R. G. & Clench H. K., 1947b. New Indo-Australian Lycaenidae (Lepidoptera). Bulletin of the Brooklyn Entomological Society 42: 1-16. Reference page. 

1952

• Klots, A.B. & Clench, H.K. 1952. A new species of Strymon Hübner from Georgia (Lepidoptera, Lycaenidae). American Museum Novitates (1600): 9 pp., 3 figs. Reference page. 

1957

• Clench, H.K. 1956[1957?]: New Neotropical Cossidae (Lepidoptera). Annals and magazine of natural history (12), 9(108): 897–906. DOI: 10.1080/00222935608655914 Reference page. 

• Clench, H.K. 1957a: Cossidae from Chile (Lep.). Mitteilungen der Münchner Entomologischen Gesellschaft 47: 122–142. Full article. Reference page. 

1958

• Clench, H.K. 1958. A new Cossid Moth from Western China (Lepidoptera: Cossidae). Mitteilungen der Münchner Entomologischen Gesellschaft 48: 82–85. full article zobodat (PDF). Reference page. 

1959

• Clench, H.K. 1959: Notes on African Cossidae. Veröffentlichungen der Zoologischen Staatssammlung München 6: 1–28. Full article (pdf). Reference page. 

1960

• Erlich, P. & Clench, H.K., 1960. A new Subgenus and Species of Callophrys (s.l.) from the Southwestern United States (Lepidoptera: Lycaenidae). Entomological News 71(6): 137-141, pl.1. BHL text, plate Reference page. 

1961

• Clench, H. in Ehrlich, P. & Ehrlich, A., 1961. How to Know the Butterflies Wm.C. Brown Co., Dubuque, Iowa. v + 262pp., 525 figs. PDF Reference page. 

1963

• Clench, H. K., 1963. Further Notes on West African Lycaenidae (Lepidoptera). Entomological News 74: 43–49. Reference page. 

• Clench, H.K., 1963. Callophrys (Lycaenidae) from the Northwest. Journal of Research on the Lepidoptera 2 (2): 151–160. Full article: .

• Clench, H. K., 1963. Notes on Axiocerses. Journal of the New York Entomological Society 71: 181–188. Jstor Reference page. 

1964

• Clench, H.K., [1964]. A Synopsis of the West Indian Lycaenidae, with Remarks on their Zoogeography. Journal of Research on the Lepidoptera 2(4): 247–270. PDF Reference page. 

1965

• Clench, H.K. [1965]. Notes on Some African Theclinae (Lepidoptera: Lycaenidae). Journal of the New York Entomological Society 72(4): 237–244. BHL. Reference page. 

• Clench, H. K., 1965. In Fox, R.M., Lindsey, A.W., Clench, H.K., & Miller, L.D.. The butterflies of Liberia. Memoirs of the American Entomological Society 19: [iv], ii, 1-438. BHL. Reference page. 

• Fox R.M., Lindsey A.W., Clench H.K. & Miller L.D., 1965. The Butterflies of Liberia. Memoirs of the American Entomological Society, (19): 1–438. BHL. Reference page. 

• Clench, H. K., 1965. A collection of butterflies from western Chihuahua, Mexico. Entomological News 76 (6): 157 -162. BHL. Reference page. 

• Clench, H.K. 1965. Variation and distribution of Hemiargus huntingtoni (Lepidoptera: Lycaenidae). Journal of the New York Entomological Society 73: 41–45. Reference page. 

• Clench, H.K. 1965. African Deudorix (Lepidoptera: Lycaenidae): notes and descriptions. Journal of the New York Entomological Society 73: 178–181. Reference page. 

1970

• Clench, H. K., 1970. A new subspecies of Brephidium exilis from Yucatan (Lepidoptera: Lycaenidae). J. Lep. Soc. 24(1): 3–6, 1 fig. Reference page. 

1971

• Clench, H. K., 1971. Two new hairstreaks from Mexico (Lepidoptera: Lycaenidae). Bull. Allyn Museum 3: 1–6. Full article: Reference page. 

1972

• Clench, H. K., 1972. Celestrina ebenina, a new species of Lycaenidae (Lepidoptera) from the eastern United States, Ann. Carneg. Mus. 44: 35–44, 12 figs. Reference page. 

1975

• Clench, H.K., 1975. A review of the genus Hypostrymon (Lepidoptera: Lycaenidae). Bulletin of the Allyn Museum 25: 1–7. PDF. Reference page. 

1979

• Clench, H.K., 1979. The Names of certain Holarctic Hairstreak Genera (Lycaenidae). Journal of the Lepidopterists' Society 32(4): 277-281. BHL. Reference page. 

1980

• Harvey, D.J.; Clench, H.K. 1980: Dianesia, a new genus of Riodinidae from the West Indies. Journal of the Lepidopterists' Society 34(2): 127–132. Full article (PDF)Reference page. 

1981

• Clench, H.K., 1981. New Callophrys (Lycaenidae) from North and Middle America. Bull. Allyn Mus. No. 64:1-31. 48 figs. PDF. Reference page.