Spadefoots. Scaphiopodidae: Scaphiopus 



Fig. 2. I. Wide interorbital space. 2. Upper eyelid. 3. Small round 

 parotoids. 4. Fleshy webs. 5. Broad waist. 6. Pectoral glands. 

 7. Vertical pupil. 8. Two metatarsal tubercles, the outer large and 



with a cutting edge. 



a. Parotoid absent or indistinct; tympanum indistinct; no 

 pectoral gland. 

 b. Hind limb longer (.78— .96 in L.); fore limb longer 

 (1. 51-2. 19 in L.); fourth finger longer (6.28-8 in L.); 

 foot with tarsus longer (1. 57-1. 76 in L.); fourth toe 

 longer (2.66-3.29 in L.); size small 1 1/2-2 2/5 inches 

 (37-61 mm.); back uniform or with light bands. 

 Hammond's spadefoot. Scaphiopus hammondii. Plate VII. 



bb. Hind limb shorter (.89-1.15 in L.); fore limb shorter 

 (2-2.31 in L.); fourth finger shorter (8-1 1.2 in L.); 

 foot with tarsus shorter (1.7-2.35 in L.); fourth toe 

 shorter (3.02-4 in L.); size larger 1 7/8-3 1/5 inches 

 (48-80 mm.); back greenish, more or less marbled 

 with light. 



Couch's spadefoot. Scaphiopus couchii. Plate VI. 



aa. Tympanum distinct; parotoid distinct; pectoral glands 

 present, size 2-2 7/8 inches (50-72 mm.). 



Scaphiopus holbrookii. Plate VIII. 



[b. Head to angle of mouth smaller (3.14-3.8 1 in L.); 

 width of head smaller (2.58-2.66 in L.); snout smaller 

 (5.4-6.3 in L.); tympanum smaller (11. 5-16 in L.). 



Hurter's spadefoot. Scaphiopus holbrookii hurterii.] 



15 



