6 Proceedings of the Biological Society of Washington. 



tions of arms and legs; a light line across head between hind borders of 

 eyelids; irregular white markings on sides between insertions of legs, and 

 on sides and lower surface of tail; white dots on throat; limbs mottled 

 black and gray. 



Total length 42, head 4, body 17, tail 21 mm. 



Variation: A male, Mus. Comp. Zool. 8018, from Guerrero, Hidalgo, 

 Mex., has 4 costal folds between appressed toes; tail shorter than body; 

 head width 6 in length from snout to vent; head length 3 7-10 in length of 

 body; an enlarged tooth on premaxilla pierces lip; dull grayish, lighter 

 below; white dots on sides; a trace of lighter above insertions of arms. 



Total length 40.5, head 5, body 18.5, tail 17. 



A female, Mus. Comp. Zool. 8020, same data as type, has head length 4 

 in length of body; no anal papillae; paraphenoids separated from vomerines 

 by % length of latter; a light reddish streak from eye nearly to leg, widest 

 above arm where it extends across back to meet its fellow of the opposite 

 side; above this a dark streak and middle of back light reddish with dark 

 Vs. Otherwise like type. 



Total length 37, head 3.5, body 14.5, tail 18. 



Two other females, same data as type, agree with it in color. 

 8019 Total length 40, head 4, body 18, tail 18. 

 8021 Total length 38, head 4, body 16, tail 18. 



No. 8019 is filled with the yolk masses of large eggs and is fully adult. 



Habits: Five were taken on the heavily wooded Cerro de los Estropajos 

 (between Jalapa and the hamlet of San Andres, and only a few miles from 

 the former), altitude about 5000 feet. One was under a piece of wood on 

 the ground and the others were under the bark of logs. 



Remarks: While this smallest of all salamanders belongs to a group 

 which contains six species, and which ranges from Mexico to Costa Rica, 

 there is little danger of confusion save with one form, pennatuhis. These 

 two alone have the enlarged nostrils and the rudimentary feet. But 

 pennatulns differs in having : no teeth on the maxilla ; 6 costal folds between 

 appressed toes; tail longer than head and body; a brown dorsal stripe and 

 black sides. 



U. S. N. M. No. 30352 is 0. townsendi. The locality given is " Tehuante- 

 pec?, Sumichrast?. " In view of the fact that pennatuhis is more an animal 

 of high mountains, and that Sumichrast recorded it from Cerro de la 

 Defensa, near Cordoba, Vera Cruz, his record probably refers to townsendi, 

 and possibly the National Museum specimen with uncertain locality is 

 his basis for this record. 



