Insect and spider bites can occur almost unnoticed, or they can be painful. Learn more about the symptoms and when to seek help here. Health Conditions ... yellow fever; encephalitis; Fleas.

Deer flies are distinct from horseflies in a few ways; the easiest deer fly identification is their huge eyes and the purple or green bands found on their blue or yellow-green wings.

MOSQUITO CARRIES YELLOW FEVER GERM; Preliminary Report of Army Medi- cal Board. NO OTHER MODE OF INFECTION Members of the Board Believe the Dis- ease Is Only Propagated by the Bite of the Insect.