Examples from literature

• But as I am sure from your greater knowledge of ornithology and entomology that you will write a much better discussion than I could, your paper will be of great use to me. 
• Entomology was his special study. 
• He was an amateur physician, a student of botany and entomology, and a considerable geologist. 
• It reminded him of two or three books on entomology which he had left in his mother's cabin. 
• The father was particularly interested in entomology, and Spencer himself used to collect, describe, and draw insects when a boy.