Subject
- Catholic Church--Prayers and devotions, Latin2
- Catholic Church--Prayers and devotions--Latin7
- Catocala amica1
- Catocala cara1
- Catocala clintonii1
- Catocala ilia1
- Catocala muliercula1
- Catocala ultronia1
- Cecropia Silkmoth1
- Celastrina1
- Celastrina ladon1
- Ceratomia catalpae1
- Ceratomia undulosa2
- Ceratonia amyntor2
- Charred Dagger Moth1
- Chesapeake Bay (Md. and Va.) -- Maps -- Early works to 18001
- Chlosyne gorgone1
- Choristoneura1
- Choristoneura parallela1
- Chorochlamys chloroleucaria1