366 Dr. A. G. Butler on new Pierine Butterflies, Snout slightly longer than the eye, with distinct canthus rostralis and sloping high sides ; tympanum half the size of the eye ; interorbital space much broader than the upper eyelid. Tongue with a shallow emargination behind. Vome-rine teeth in two short transverse series between the choanae. Fingers free, the first shorter than the second, the fourth nearly as long as the third ; toes free, tlie first longer than the second, the fifth much longer than the third. Fingers and toes but slightly swollen at the tip. The lengtli of the body equals the distance of the vent from the metatarsal joint. No metatarsal tubercle. Upper parts green (bluish in spirit) ; throat and chest bluish, with a yellow Y-lIke marking in the middle and other yellow symmetrical markings on the sides ; the largest of the granules are within these markings. Lower eyelid with a small yellow spot in front and behind. Lower jaw with a yellow margin, continued as a narrow glandular band to the middle of the length of the body. A yellow spot in each groin and several otliers round the vent and on the lower side of the thighs. No sharply defined Avhite line along the outer side of the forearm and tarsus. Length of body 68 millim. Distance of vent from extremity of longest toe 95 millim. This species seems to have been seen already by Dr. C. Berg, who refers two tubercidated specimens from the Prov. Missiones to Ph. Burmeisteri (An. Mus. Nac. Buenos Aires, V. 1896, p. 212) j indeed, the two species are closely allied. But after a comparison of our specimen with the types of Ph. Burmeisteri^ I cannot hesitate to regard the differences in the structure of the skin, in the coloration, and in the form of the head as characters of specific value. XL. — Dckcriptions of six Pierine Butterflies of the Genus Catasticta in the Collection of the British Museum. By Arthur G. Butler, Ph.D. &c. The following undescribed species were mostly collected by the late Mr. Buckley in Ecuador, and were confounded by Hewitson (who unfortunately destroyed the labels recording their exact habitats) with well-known species. 1. Catasticta vapina, sp. n. Nearest to C. pinava^ which it nearly resembles on the
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