Occasional Papers of the Museum of Zoology 9 



quicito to Boquete, Atlantic slope, 6 ; Pacific slope, same trail, 

 under stones and debris along edge of stream 2 miles above 

 Boquete, 3,900 feet, 11 (U. Mich., 58286) ; same trail, wet for- 

 est 4,500-5,500 feet, 8 (U. Mich., 58289, 58291) ; rain forest 

 by last creek on trail on Pacific slope, 4,500 feet, 5. 



Key to Central American forms of PJiyllo'bates 



A. Dorso-lateral line yellow, thi-oat of both sexes black, belly black 



with fine yellow lines P. lugubris (Schmidt), (Costa Eica 



and western Panama). 

 AA. Dorso-lateral line white. 



B. Throat and chest of both sexes mottled with gray, disk of toe 



I = disk of toe II P. Mngsburyi Boulenger (eastern 



Panama to Ecuador). 

 BB. Throat and chest of female always immaculate, disk of toe I = -V^ 

 disk of toe II. 



C. White line from groin not reaching eye, disk of toe V = disk of 



toe IV, throat of male white P. latinasus (Cope) (Costa 



Eica to Colombia). 

 CC. White line from groin reaching eye, disk of toe Y ^ Vi disk of 

 toe IV, throat of male black. 



D. Anvil-shaped black marking on thigh, thigh not red in life, tip 



of toe V not reaching penultimate joint of toe IV P. talamancae 



(Cope) (Costa Eica, western Panama). 

 DD. Linear black marking on thigh, thigh red in life, tip of toe V 



reaching penultimate joint of toe IV P. nuhicola Dunn 



(western Panam^ at high altitudes). 



Save for P. kingsburyi we saw all these carrying their 

 tiny tadpoles. Tadpoles of latinxisus, talamancae, and nuhi- 

 colu are at hand. Similar habits have been described for 

 trinitatis and for suhpunctatus. Apparently the male carries 

 the very j^oung tadpoles to the stream and leaves them there. 

 There is no evidence that the male of Phyllobates gets the tad- 

 poles from the water. The stream at La Loma contained all 

 stages from the tiny young ones 10-12 mm. long to the trans- 

 forming specimens. Males carrying tadpoles were put into 

 water and the tadpoles left the parent and swam away. Noth- 

 ing was seen of the eggs or the mating. The tadpoles of lati- 

 nasus are similar in all respects to the described tadpoles of 

 sylvatica, trinitatis and suhpunctatus. The tadpoles of tala- 

 mancae and of nuhicola are very different. 



