Studies conducted by Wehrle[5] show that conenoses are parasitic on woodrats and breed in the dens of these rodents. They are also found in meadow vole (mouse) nests. Early in May the winged conenose adults begin dispersal flights, invading human habitations in the vicinity of woodrat dens. Although reported as most active in May and June, they may be expected throughout the summer until October, and are much more numerous in the country than in cities.
During the daytime, the insects remain hidden under rugs, between quilts, or even in bedding or behind drapes. They may be seen during the evening on ceiling beams, walls, curtains, and around windows. They are alert and difficult to catch.
Conenose bugs do not attack people until the victim is quiet or asleep, and may take blood without awakening the host. Immediately after being bitten, however, the victim is awakened by severe itching. The area about the puncture swells and becomes red and feverish. Welts at the point of puncture are hard, and may be 1 to 3 inches in diameter.
About 5% of the people repeatedly bitten develop severe allergic reactions with burning pain and itching at the site of the bite, itching on the palms of the hands, soles of the feet, neck, and groin; general body swelling, and a nettle-like rash over the body. Some persons feel ill, with light depression followed by quickening of the pulse. Others are faint, weak, and nauseated. In very severe allergy these symptoms may lead to anaphylactic shock and unconsciousness.
Treatment of conenose bites
Although a specific treatment for conenose bites has not been developed, some physicians use epinephrine. More promising results appear possible with antihistamine preparations (under doctor’s prescription) such as benadryl and pyribenzamine, which have been effective by mouth, and in severe reactions, by intravenous injections.
Matheson[6] writes: “When a blood-sucking insect bites, it is always possible that the proboscis may be contaminated with pathogenic organisms. If such organisms become localized near the point of puncture or gain access to the blood stream, results may be serious. It is always wise to use some disinfectant such as alcohol, tincture of iodine, etc., and to press out the blood, if possible, from bites made by insects.” Antibiotics are frequently necessary to control the extremely high percentage of secondary infections.
Physicians recommend the application of a hot Epsom salt pack over the point of puncture as soon as possible after the bite has been received. Application of antiphlogistine alleviates the severe itching. ACTH is recommended by some physicians. Hydrocortizone ointments reduce the skin eruptions and local pain.
Control of conenose bugs
Prevention is more satisfactory than treatment, and since conenoses live in woodrat dens, these rodents should be eliminated from the vicinity. Weatherstripping around all permanent doors and screen doors, tight-fitting, holeless screens in all windows, and fine screens in fireplace chimneys will help to keep the bugs out of houses. Occasionally they may be seen on walls and ceilings in the evening, and may be killed with a flyswatter.