366 Dr. A. G. Butler on new Prerine 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 ashallow emargination behind. Vome- 
rine teeth in two short transverse series between the choane. 
Fingers free, the first shorter than the second, the fourth 
nearly as long as the third; toes free, the first longer than 
the second, the fifth much longer than the third. Fingers 
and toes but slightly swollen at the tip. The length 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 others round the vent and on the lower 
side of the thighs. No sharply defined white 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 tuberculated specimens from the Prov. 
Missiones to Ph. Burmeistert (An. Mus. Nac. Buenos Aires, 
v. 1896, p. 212) ; indeed, the two species are closely allied. 
But after a comparison of our specimen with the types of 
Ph. Burmeister, 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.—Deseriptions of six Pierine Butterflies of the Genus 
Catasticta in the Collection of the British Museum. By 
Artuur G. Butter, Ph.D. &c. 
Tue 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 
