NOTES ON THE BUTTERFLIES 75. AGERONIA or PERIDROMIA ARETHUSA (Cram). Quite a rare insect. I have only taken one specimen in the west. 76. AGERONIA or PERIDROMIA GUATEMALENA (Bates). This is a common insect widely distributed through the Colony. It has an alternately flapping and sailing flight, and when on the wing has the curious habit of making a distinct crackling noise with its wings. It almost always comes to rest on the trunks of trees or on posts with its wings fully spread out and in contact with the object it is resting on. In this position it often escapes observation as the colours on its wings harmonise very perfectly with the surroundings. 77. AGERONIA or PERIDROMIA FERENTINA (Godart). I only know this butterfly from the Cayo District. 78. CHLORIPPE LAURE (Druce). This beautiful insect belongs to the group of "reflecting butterflies. In general appearance the upper surface strongly resembles a yellow-and- white banded Adelpha, that is, if it is viewed directly from above, but if looked at from an angle the whole surface of the wings becomes instantly suffused with the most intense and brilliant violet. It is a delightful insect, but unfortunately