ART. 11 NORTH AMERICAN TADPOLES — WRIGHT 25 



body length, average 2.12. Depth (4.0-6.0 mm.) of tail in length of 

 tail 2.88-3.83, average 3.33. Muscular part (2.0-2.6 mm.) 1.60-2.30 

 in depth of tail, average 1.85. Spiracle 1.1-1.5 nearer base of hind 

 legs or vent region (4.2-5.8 mm.) than the tip of the snout (6.0- 

 7.0 mm.). Spiracle 1.25-1.7 nearer eye (3.2-3.8 mm.) than base of 

 hind legs or vent, average 1.45. Eye 1.0-1.6 nearer to tip of snout 

 (3.0-3.6 mm.) than to spiracle (3.2-3.8 mm.) average 1.16. Nostril 

 1.4-2.75 nearer eye (0.8-1.6 mm.) than snout (1.4-2.2 mm.) average 

 1.9, mouth (2.0-2.6 mm.), usually 1.1-1.83 larger than internasal 

 space (1.2-2.0 mm.), average 1.47. Mouth contained 1.07-1.5 

 (average 1.07-1.5) in interorbital distance (2.6-3.6 mm.). Internasal 

 space (1.4-2.0 mm.) contained in interorbital space 1.5-2.16 average 

 1.86. 

 The dimensions of the largest tadpole are : 



Mm. 



Total length 27. 



Body length 10. 



Body depth ■----.- 4.8 



Body width 6. 2 



Tail length 17. 



Tail depth 6. 



M usculat lire of tail 2. 6 



Spiracle to snout 6. 8 



Mm. 



Spiracle to vent 5. 4 



Spiracle to eye 3. 8 



Eye to snout 3. 2 



E3'e to nostril 1. 



Nostril to snout 2. 



Mouth 2. 6 



Interorbital distance 2. 8 



Internasal distance 1. 6 



BUFO QUERCICUS Holbrook 



Plate 6, figure 8 



Color description from life {July 7, 1921). — General coloration of 

 the body is grayish olive, olive lake, grape green, or ecru olive, pro- 

 duced by close set dots of lighter color over a blackish background. 

 Very few small black spots on the back. In one two-legged specimen 

 general color quaker drab or of the vinaceous group. There is a 

 black spot over the nostril and one over each eye. The belly is pale 

 purplish vinaceous; the throat and mentum with no bright color. 

 Gill region with clusters of deep olive buff or the general colors above. 



Tail. — The upper crest much more heavily marked than in Bujo 

 terrestris. Lower crest is also more or less marked with black. Along 

 the dorsum of the muscular part of the tail are six or seven black 

 saddles. Along the ventral edge of muscular part are small black 

 clusters but not so prominent as dorsal saddles. In a two-legged 

 specimen alternation of dark and light on taU musculature for eight 

 or nine spots. Along the back of body proper the characteristic 

 paired spots (four or five of them) appear. 



Iris black and general colors above. 



