MEXICAN TAILLESS AMPHIBIANS 209 



diameter of tympanum, 6; transverse diameter of eye, 8; anterior 

 edge of eye to nostril, 5.4 mm.; the hind limb being carried forward 

 along the body, the tibio-tarsal joint reaches to anterior margin of 

 eye. Cope in 1889 published the following short diagnosis of the 

 subspecies brachycephala : 



Head shorter and more obtuse, entering the length [of head and body] three 

 and a half times; males without or with rudimental external vocal vesicles; 

 dorsal spots larger, widely yellow bordered; tibial crossbands complete; no 

 longitudinal band on the front of the thigh. 



Mocquard's Rana trilobata (M.H.N. P. No. 169a, parchment label 

 No. 97-189) is based on a single 3^oung individual collected by Leon 

 Diguet at Guadalajara in Jalisco. The specific name alludes to the 

 trilobed form of the posterior end of the tongue. Boulenger^* has 

 examined the type in the Paris Museum and states that "there is a 

 short furrow between the horns of the tongue, such as I have observed 

 in some R. escvlenta." This specimen may be briefly characterized 

 as follows: Head-and-body length, 33.5 mm.; the hind limb being 

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

 the center of the eye; a dorso-lateral glandular dermal fold present; 

 posterior end of tongue has three projections as described by Mocquard ; 

 muzzle rounded; no linear glandular folds on back between dorso- 

 lateral glandular dermal folds; dark spots and markings on upperparts 

 indistinct; posterior limbs indistinctly crossbarred ; tympanum slightly 

 more than half the diameter of the eye. 



Five adult males (B.M. Nos. 1895. 7. 15. 31-35), which were 

 collected at Omilteme in Guerrero by H. H. Smith, a collector em- 

 ployed b}'^ Godman and Salvin, become the cotypes of Giinther's 

 Rana omiltemana. The largest one of these cotj^pes has a head-and- 

 body length of 60.5 mm. Giinther's published description of this 

 species may be summarized as follows: Snout narrow, acuminate; 

 interorbital space narrow, a little more than half the width of the 

 upper eyelid; rather small rounded or subquadrangular dark spots 

 with narrow light edges on back; small glandules on back between 

 narrow dorso-lateral glandular dermal folds; hind limbs with light 

 edged dark crossbars; external vocal vesicles small; hind limb, without 

 tarsus, as long as two-thirds length of body. 



Weed has published descriptions of tw^o well-marked color variants 

 of the leopard frog. These specimens were selected from a tank 

 containing several thousand frogs. Color characters alone were 

 employed to distinguish Rana hurnsi (F.M.N.H. No. 3065) and 

 Rana kandiyohi (F.M.N.H. No. 3066) from Rana pipiens. The 

 upperparts of Rana hurnsi are described as being more or less immacu- 

 late, with some shade of green or brown, while Rana kandiyohi has 

 black spots that apparently fuse vnth. a mottled ground color. 



M Boulenger, Q. A., Proc. Amer. Acad. Arts and Sci., vol. 55, no. 9, p. 435, footnote, Aug., 1920. 



