Ill 



Type. — Adult male, No. 17,974, Museum of Comparative Zoology; deserted 

 huts near Perico, valley of the Chinchipe. September, 1916. G. K. Noble. 



Description of type. — Head much larger than broad; distance from the 

 anterior angle of the eye to tip of snout a trifle longer than distance from 

 posterior border of eye to posterior angle of ear; greatest diameter of eye con- 

 tained in the distance between eye and tip of snout one and four-fifths times; 

 ear opening narrow, oblique, approximately one-half the greatest diameter of 

 the eye; digits slender, the distal dilation truncate, its greatest width contained 

 about twice in the greatest diameter of the eye; slender part of the digit with a 

 series of enlarged plates below, nine of these plates under the fourth toe, 

 separated from the distal dilations by four rows of small scales, each row 

 consisting of either two or three scales; snout covered with uniform granules 

 or small tubercles; occiput with minute granules intermixed with tubercles 

 which are smaller than the large tubercles of the back; no denticulation on the 

 anterior edge of the ear opening; rostral twice as broad as high, rectangular 

 but notched at two corners by the nostrils, partly cleft in the mid-line as in 

 most members of the genus; two enlarged internasals in broad contact; nostril 

 in contact with the first supralabial, the rostral, the internasal and two small 

 scales; six supralabials and six infralabials to the middle of the eye; mental 

 large, pentangular, in contact with two enlarged chin-shields which are sur- 

 rounded with scales approximately one-third the size, these chin-shields grad- 

 ing rapidly into the small scales of the throat ; back covered with small granules 

 and sixteen longitudinal rows of trihedral keeled tubercles; a few tubercles 

 lateral to the outer rows, tending to form an incomplete row on either side, 

 just dorsal to the enlarged ventral scales; lower surfaces with smooth, imbricate 

 scales in thirty-one longitudinal rows (counting the enlarged scales which 

 encroach upon the sides of the body) ; sixty-two of these abdominal scales in a 

 straight line between constriction of the neck and vent; tail (reproduced) 

 cyhndrical, tapering, covered with imbricate smooth scales, those of the ventral 

 surface much larger than those above; a median series of transversely expanded 

 scales below, these three to four times as broad as long. 



Pale grayish brown above and below; a series of irregular dark blotches on 

 the dorsal surface; no facial stripe; no bandings of a dark tone on the back; 

 tail marked as the back with a series of poorly defined spots. 



Measurements. — Total length, 122 mm.; head and body length, 58; fore leg 

 from axilla, 18; hind leg from vent, 24; greatest width of the head, 12. 



Remarks. — Three species of Phyllodactylus are found in the 

 region traversed by the Harvard Peruvian Expedition of 1916. 

 Phyllodactylus inaequilus Cope is confined to the sandy deserts of 

 the coast. The expedition met with it at Paita and Eten where 

 it was found only under boards, brush and other litter strewn 

 about on the sand. The two other species differ radically from 

 Phyllodactylus inaequilus in habits, for they were never found on 

 the ground, but always in houses or in deserted shacks. Phyllo- 

 dactylus phacophorus Tschudi seems to have a much wider 

 range than Phyllodactylus magister. The former species was 

 found in many scattered localities in the provinces of Piura 

 and Cajamarca, namely: Huancabamba and Chongollapi as well 

 as Bellavista and Perico. The latter species appears to be chiefly 

 confined to the Chinchipe and Marafion valleys, although one 

 specimen was taken at Tamboa. Although Phyllodactylus 

 phacophorus and Phyllodactylus magister were taken in the same 

 huts, it is probable that they do not compete with each other in 

 securing food, for the latter species is usually very much larger 



