Occasional Papers of the Museum of Zoology 5 



upper surface of the limbs is often set off from the lower by a dark 

 line which merges gradually into the color beneath. The females 

 are usually more brightly colored than the males. 



Males are smaller than females and their legs are correspond- 

 ingly longer. Twenty-five females varied from t,;^ to 50 mm. in 

 length,-* average 42.1-}- mm.; in this series the tibio-tarsal artic- 

 ulation marked the middle of the eye in three, the front of the 

 eye in eighteen, and the nostril in four. The length to the "tail" 

 of thirty-one males varied from 29 to 40 mm., average 35 .4+ mm. ; 

 the "tails" were from 3 to 9 mm. in length, average 5.4 mm.; 

 the tibio-tarsal articulation reached to the front of the eye in four, 

 to between the eye and the nostril in three, and to the nostril in 

 twenty-four. Breeding males differ from the non-breeding in 

 having an enormously enlarged (two to three times normal size) 

 forearm and inner palmar tubercle; they have a white horny 

 patch on the forearm where the inner palmar tubercle touches it 

 when the arm is folded, and several have the inner palmar tubercle, 

 the inner side of the first two fingers, and the round spot on the 

 forearm covered with black; the underside of the "tail" is greatly 

 congested; the underside of the forearm becomes gray thickly 

 dotted with white. 



That the breeding season is greatly prolonged is evidenced by 

 an examination of the specimens. On June 27, July 2, July 8, 

 July 30, August 22, August 24, and early in September, females 

 contained large eggs and males possessed the enlarged forearm 

 and anal region characteristic of the breeding season, while other 

 males and females taken on the same dates are normal. The 

 length of the breeding season is further borne out by the fact that 

 larvae in all stages of development might be taken in the same 

 stream on the same day. Two bunches of eggs were found under 

 large stones in MacTaggert Creek on August 5. They were large 



* Measurements were made on specimens before they were preserved. 



