Collector: Ludlow, F., Sherriff, G. & Hicks, J.H.
Full name: Ludlow, Frank; Sherriff, George & Hicks, J.H.
Active from 1933 to 1951
Known collecting areas:
Bhutan - 1933-51
China - 1938-49. TIbet 1947
India - 1942-49
Pakistan - 1940-49