Hay Batrachians and Reptiles of D. C. 131 



shaded grass along the banks of some spring-fed stream. Note probably 

 similar to that of the leopard frog. 



21. Rana clamata Daudin. Green Frog. 



Head broad and flattened, snout rounded; eyes large and protruding; 

 skin of back and sides more or less rough; a dorso-lateral glandular fold 

 from eye to pelvic region, this sends a branch behind tympanum to front 

 of arm. Color from bright green to brown, pale below; chin marbled with 

 brown; back usually with indefinite small blotches of dark brown and 

 similar, but larger, blotches on the sides. Length 3 to 4 inches. 



This species bears a very close resemblance to young individuals of the 

 bullfrog but may be distinguished at once by the presence of the gland 

 ular folds. It is quite common through the spring and early summer. 

 I have found it in abundance in the series of pools between the canal 

 and the river about 2$ miles above Georgetown. Its active movements 

 and its strictly aquatic habits makes it a more difficult species to collect 

 than most other species of this genus. Note, a series of three or four 

 croaks irregularly descending in pitch. 



22. Rana sylvatica Le Conte. Wood Frog. 



Body slender and graceful; head broad; legs long; a dorso-lateral 

 glandular fold from eye to end of body and another from mouth to front 

 of arm. Color grayish or light chocolate brown, sometimes with green 

 ish; beneath, whitish; a light streak from snout to vent, glandular folds 

 often golden yellow and tympanum coppery, a black stripe from snout 

 to front of eye, sides and back sometimes obscurely blotched and limbs 

 barred. 



An inhabitant of woodlands exclusively, this species is not often seen 

 except during the breeding season when it sometimes occurs in great 

 abundance in secluded ponds. During the remainder of the summer it 

 prefers to live among the fallen leaves, where its colors correspond so 

 perfectly with its surroundings that it is very effectually concealed. 

 Note, a series of rapid, sharp croaks, all of abcut the same pitch. 



23. Rana catesbeiana Shaw. Bull Frog. 



Body large and heavy; head large and broad, snout rounded; legs long 

 and strong; skin of back nearly smooth; no dorso-lateral folds; a small 

 glandular fold from eye to front of arm, between this and the tympanum 

 a sharp groove. Color yellow, green, brownish or deep brown, sometimes 

 uniform but usually with indefinite blotches of brown; sides usually 

 with marblings of brown; underparts white or yellowish. Length 4 to 8 

 inches, or total length 9 to 18 inches. 



This, our largest frog, is very common along the larger and deeper 

 watercourses about the city, wherever there is vegetation close to the 

 waters edge to offer it a secure retreat. The thickets along the canal 

 and the Eastern Branch are congenial lurking places from which it is to 

 be taken only by frog hunters who go out at night and spear it from 

 boats. Its roaring bass note is well known to all. 



