398 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Bana virginiana Lam., Syn. Kept., p. 31. 



Bana palustris Gu6rin, Iconogr, Rept., PI, 26, fig. 1. 



Bana oxyrliynGhus Hallow., Proceed. Ac. Phila. (1856), p. 143. 



Bana berlandieri Baird, U. S, Mex. Bound. Surv., Kept., p. 27, PI. 36, fig. 7-10, 



Vomerine teeth in two scarcely oblique groups between the choanee. 

 Head moderate j snout rather pointed j interorbital space half as broad 

 as the upper eyelid; tympanum distinct, nearly as large as the eye. 

 Fingers moderate, firstextending beyond second ; toes not quite webbed 

 to the end; subarticular tubercles of fingers and toes well developed; 

 inner metatarsal tubercle very small, blunt; no outer one. The hind 

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

 tion reaches nearly the tip of the snout. A prominent, narrow, gland- 

 ular lateral fold. Olive or grayish-brown, changing to green, above, 

 with regular oval or rounded, medium-sized, dark brown, light-edged 

 spots; legs cross-barred; beneath immaculate. Male with two gen- 

 erally well-developed vocal sacs. North and Oentral America. 



There are four subspecies of the Uana virescens, which pass into each 

 other by occasional intermediate specimens. They differ as follows: 



Head entering length of head and body two and a half or less than three times ; males 

 with external A'esicles ; muzzle more acuminate; no cross-bars on tibia; spots 

 smaller B. v. sphenocephala. 



Head entering length of head and body two and a half to nearly three times ; no ex- 

 ternal vocal A^esicles; muzzle more or less acuminate; spots less distinct; tibia 

 generally cross-barred; no longitudinal band in front of femur. . . li. v. austrioola. 



Head acuminate but shorter, entering the length three times ; males with external 

 vocal vesicles; spots smaller, not so distinctly yellow bordered; cross-bars of 

 tibia generally interrupted ; a longitudinal band on the front of the thigh. 

 B. V. virescens. 



Head shorter and more obtuse, entering the length three and a half times ; males with- 

 out or with rudimental external vocal vesicles; dorsal spots larger, widely yellow 

 bordered ; tibial cross-bands complete ; no longitudinal band on the front of the 

 thigh B.v. hraehycejihala. 



The last-named subspecies is the one I called B. v. herlanderi, but it 

 turns out that the typical specimens of that species belong to the sub- 

 species Virescens. The latter is the Bana utricularla of Harlan, but it 

 is also the true B. virescens of Kalm. 



The characters which distinguish the above subspecies are not with- 

 out exceptions. Some specimens (No. 13372) from Wheatland, Ind., 

 are intermediate in the length of the head between the longer aud 

 shorter forms. Quite trustworthy is the non-barring of the tibia in 

 separating the B. v. sphenooepliala, but it is less constant in the B. v. 

 virescens. Thus in the B. v. virescens two specimens (3431) from Saint 

 Louis, Mo., and one (3429) from Grand Detour, 111,, have two complete 

 tibial cross-bars, and No. 3303 has three; No. 10046 has only one. lu 

 the R. V. hrachycephala there are two or three such bars, but in the fol- 

 lowing specimens there is but one complete, or all are interrupted : Nos. 

 4794, 3427, 3418, 9998, 8499, 11926, The spots are smaller, aud like the 



