108 Trans. Acad. Sci. of St. Louis. 



mile away. It is somewhat difficult to isolate a single 

 voice from the chorus. From a distance it reminds one of 

 the whistle of snipes. If one is once caught sight of, it is 

 not difficult to see others, especially if the floating leaves 

 and sticks in the shallow water are pushed aside. Many 

 tiny, yellow or brown, frogs will swim out among the 

 leaves. Most of them will be males, as they far outnum- 

 ber the females. The best time to catch them is at night, 

 when it seems they do not hear as well. It is not as diffi- 

 cult as might be supposed to locate them by means of 

 their inflated white throats. 



Dates of capture. — April 4th (plentiful); May 6; Oct. 

 7,15. 



25. Hyla squirella Bosc. Southern Tree Frog. Squirrel 

 Frog. 



Dendrophyas squirella, Calamita squirella. 



Description. — Head moderate, a little broader than long. Snout 

 rather acute. Tongue circular, slightly nicked, and free behind. Vom- 

 erine teeth in two small patches between the choanae. Canthus ros- 

 tralis distinct, loral region slightly concave, interorbital space a little 

 broader than the upper eye lid. Eyes prominent. Tympanum distinct, 

 one-half the diameter of the eye. Body more slender than in Hyla 

 versicolor. Limbs moderately developed. Hind limb appressed for- 

 ward along the body, the tibio-tarsal articulation reaching nearly to the 

 tip of the snout. Fingers very slightly webbed at the base. Toes half- 

 webbed. Disks smaller than tympanum. Subarticular tubercles mod- 

 erate. Body above smooth, beneath granulated on the abdomen and 

 thighs. 



Color. — Above olive-green, with irregular dark blotches, which are 

 sometimes wanting; a dusky bar between orbits; an indistinct band 

 from the nostril to eye; a white line along upper jaw to shoulder. Be- 

 neath greenish-white. Throat sometimes with a few dark spots; ex- 

 tremities obscurely marked with darker above, flesh-colored beneath. 



Size. — Length of head and body 32 mm.; from tip of snout to axilla 

 10 mm. Femur 15 mm.; tibia 15 mm.; tarsus and fourth toe together 

 20 mm. 



Habitat. — Southeastern United States, west to Louis- 

 iana, Arkansas, Missouri and Indiana. To date I have 

 never found a specimen in the State of Missouri, but in- 



