Cope.] ^"4 [June 20, 



thus rostralis sharp, lores perpendicular, muzzle vertically descending to 

 lip. Tympanic disc concealed, parotoid gland a wide oval, and rather 

 large. Fingers moderate, first and second equal, fourth longer. Heel of 

 extended posterior limb reaching posterior border of orbit. Web of toes 

 measuring half the length of the shorter. Skin rough with small harsh tu- 

 bercles, which are more remote on the back, but are closely appressed on all 

 the inferior surfaces. They are especially acute on the limbs. There are 

 two distinct tarsal tubercles, which are prominent, though small and with- 

 out cutting edge. 



Color above, blackish-brown with a few small ashen spots, and an ashen 

 cross band extending across the eyelids and intervening frontal space. 

 Lores and lips brown spotted ; blackish spots on the sides, belly, throat 

 and limbs. 



Length of head and body, M. .035 ; axial length of head to angle of man- 

 dible, .010 ; width of head at angle of mandible, .012 ; length of hind limb, 

 .042 ; length of hind foot, .020. No. 9896. 



This is one of the few Mexican species without cranial crests, resembling 

 in this respect, the B. compaclilis ;* B. Jtcematiticus, and B. politus. From 

 the first it differs in the absence of the fossorial spur ; from the last two in 

 the roughness of the skin, and the degree of palmation of the feet ; the 

 acute canthus rostralis distinguishes it from the B. politus. I dedicate it 

 to my friend Miss Sarah P. Monks, of Cold Spring, New York, who has 

 paid especial attention to the cold blooded vertebrata of North America. 



5. Spea hammondi Baird. 



Several specimens. This species was also brought from Chihuahua by 

 John Potts, so that its range is shown to be wide. Nos. 9881, 4-5, 9915. 



6. Hyla eximia Baird. Nos. 9875, 9898. 



7. Hyla arenicolor Cope. Nos. 9897, 9916. 



8. Malachylodes guttilutus, gen. et sp. nov. 



Char. gen. Mostly like Syrrhophus and Phyllobates, but with a fronto- 

 parietal fontanelle as in Liuperus. Nasal bones wide, in contact on the 

 middle line. Vomerine teeth none. Toes free, no tarsal spurs. 



This new genus is of interest as exhibiting the lowest station in the 

 series which is typified by Ilylodes, excepting that the nasal bones are not 

 so reduced as in the type of Phyllobates. The presence of the fontanelle 

 places it nearer to Hylorhina than any other of this group, and allies it to 

 the Liuperine division ; but its xiphisternum is a thin cartilaginous plate, 

 and the terminal phalanges support a transverse piece as in the Hylodhm. 



Char, specif. Head fiat and rather wide, with an oval muzzle. Canthus 

 rostralis not well marked. Eye not prominent nor large, its diameter equal 

 distance from its anterior border to the nostril. Muzzle not overhanging. 

 The heel reaches the posterior border of the orbit, and the wrist reaches 

 the end of the muzzle. The foot is rather short, and the terminal dilata- 

 tions are small. Tarsal tubercles insignificant. Skin without folds, smooth, 

 except some small tubercles on the eyelids, and a trace of areolation on the 

 posterior part of the sides and abdomen. 



* JJ. levi/rons Brocchi ; Bullet. Soclele Philoma'hique, Paris, 1877, 13 (Extract). 



