### Instruction:
Was the hermit hummingbird hawkmoth described in the 20th or 21st century?

### Input:
Macroglossum insipida, the hermit hummingbird hawkmoth, is a moth of the family Sphingidae. It was described by Arthur Gardiner Butler in 1875.

### Response:
Neither.  It was first described by Arthur Gardiner Butler in 1875, which is in the 19th century.