180 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



KEY TO MEXICAN SPECIES OF HYLELLA 



1. No tarsal fold; a narrow white stripe bordered below by darker 

 streak commences at tip of snout and extends backward on 

 canthus rostralis, across eyelid, and above tympanum, 

 becoming fainter as it approaches the groin; upper surfaces 

 light purplish, unicolored, or with scattered, round, dark 

 purple light-edged spots of the size of the tympanum; under 

 surfaces whitish; limbs mottled, witli concealed portions 

 pigmentless; skin of upperparts smooth; underparts, with 

 exception of gular region, granulated; tympanum slightly more 

 than one-third diameter of eye; no vomerine teeth; tongue 

 nearly circular, scarcely notched behind; canthus rostralis 

 angular; loreal region subvertical; fingers with vestigial 

 basal web; toes three-fourths webbed, the membrane extend- 

 ing to disks of the third and fifth toes and leaving free the 

 last phalanx of the fourth; adhesive disks smaller than or as 

 large as the tympanum; the hind limb being carried forward 

 along the body, the tibio-tarsal joint reaches between the eye 



and the end of the snout; head-and-body length, 24 mm picta (p. 180) 



A tarsal fold present; no lateral white stripe; upper surfaces ash 

 colored; under surfaces yellowish or light orange; no markings 

 on sides or on concealed surfaces of limbs, or on superior 

 surfaces of limbs; skin of upperparts smooth; underparts, 

 including gular region, granulated; tympanum one-third to 

 one-half diameter of eye; no vomerine teeth; tongue circular, 

 scarcely notched behind; canthus rostralis distinct, obtuse; 

 loreal region subvertical; fingers one-third webbed; toes three- 

 fourths webbed, the membrane reaching the disks of the 

 third and fifth toes and leaving free the last phalanx of the 

 fourth; adhesive disks as large as the tympanum; the hind 

 limb being carried forward along the body, the tibio-tarsal 

 joint reaches the eye; head-and-body length, 28-32 mm-sumichrasti (p. 181) 



HYLELLA PICTA Ganther 



1901. Hylella picta Gunther, Biologia Centralia-Americana, Reptilia and Ba- 

 trachia, pp. 286, 287, pi. 73, fig. c, Sept. 



Type locality. — Jalapa, State of Vera Cruz, Mexico. 



Range. — From Jalapa in Vera Cruz southward to Frontera in 

 Tabasco; not known to occur on the Pacific drainage area. 



Re7narks.—The type of this species (B.M. No. 1901. 12. 19. 100) 

 was collected by Mateo Trujillo at Jalapa in Vera Cruz. It is de- 

 scribed in my notes as follows: Head-and-body length, 24.1 mm.; 

 transverse diameter of tympanum, 1 mm.; transverse diameter of 

 eye, 2.3 mm.; anterior edge of eye to nostril, 2.2 mm.; the hind limb 

 being carried forward along the body, the tibio-tarsal joint reaches to 

 the anterior margin of the eye; no tarsal fold; large inner but no outer 

 metatarsal tubercle; fingers with vestige of web at base; no vomerine 

 teeth; canthus rostrahs rounded; loreal region subvertical; upper- 

 parts (in alcohol) hght purplish red, with somewhat widely scattered 

 black dots. 



