Career
Leng was an internationally known entomologist who co-founded the Staten Island Institute of Arts & Sciences with William T. Davis. He served as director from 1919 until his death on January 24, 1941. He is best known for his 1920 work on the beetles of the United States of America.
Leng was co-author with Davis of Staten Island and its People, a comprehensive history of the island from 1609 to 1929 in five volumes.
There is school named after Charles West. Leng (Public School 54) in the Willowbrook section of Staten Island.