Many minor malformations of wings, elytra, etc., have been observed in examining insects, but recently I have met with two monstrosities which seem worthy of record. The first insect is a ♀ Fœnus tarsitorius Say., given to me by my friend, Mr. Guignard, and captured by him on 24th June, 1885. In this speciment the left posterior tibia becomes trifid about one-fourth of its length from the base, the side branches diverging at an angle of about 30°.