•Jl Bulletin Wisconsin Natural History Society. [Vol. 9, Nos. 1-2. 



A. CONDITION A'l TIME OF HATCHING. 



Characters. 



A. jeffersonianum. 



Length 11 mm. 



Form of body. 



Stout. 



Eves 



Balancers Sometimes not well 



developed at the 

 time of hatching, 

 but elongate very 

 rapidly and in a 

 day or two attain 

 their full develop- 

 ment. 

 Sometimes covered 

 with opaque integ- 

 ument, but this dis- 

 appears in a day or 

 two. 

 Yellow and black 

 pigment, the latter 

 often segregated 

 along the sides to 

 form 4-6 large dark 

 spots. 



Front limb rudiment... Slightly developed. 



Color and color pattern 



A. punctatum. 



12-13 mm. 



More slender than in 

 A. jeffersonianum 

 and tail forms a 

 greater proportion of 

 the entire length of 

 the body. 



Well developed at the 

 time of hatching. 



Usually functional. 



Both yellow and black 

 pigment, but no 

 marked grouping to 

 form large spots. 



Well developed, two 

 digits. 



B. EIGHT DAYS AFTER HATCHING. 



Characters. 



Balancers . . . 

 Color pattern 



Front limb rudiment. 



A. jeffersonianum. 



Present. 



Usually spots, as de- 

 scribed. 



Elongated, sometimes 

 two digits. 



A. punctatum. 



Present. 

 No spots. 



With two digits. 



