Occasional Papers of the Museum of Zoology 29 



charca seems to take the place of capitalis, and sanguinea the 

 place of macropHS of similar Venezuelan habitats. 



14. Cristalina, on the railroad 28 kilometers above Puerto 

 Berrio, the latter town a river port on the ]\Iagdalena 16334 

 leagues above Barranquilla, Colombia. At an elevation of 

 about 1,050 feet, Cristalina lies in a rolling forested country 

 and abounds in beautiful small, clear, gravelly streams with 

 many ripples and a very few small waterfalls. These streams 

 vary from a foot or two to six to twelve feet in width and 

 all flow into the Rio Diez-y-ses, a stream of varied character, 

 15 to 30 feet wide. Collected here February 12-20, 19 17. 



Hetaerina caja occurred here only on the Diez-y-ses and 

 on the tributary quebradas for only a short distance from 

 their mouths. It was a little more numerous than macropus, 

 which was found at the same places. Capitalis was rare, 

 being represented in the collections by about the same number 

 of specimens as fjtacropus, and was taken only near the sources 

 of the quebrada Cristalina and a tributary of the quebrada 

 Sabaleticus. Miniata, on the other hand, was abundant and 

 is represented by more than three times as many specimens 

 as are all the other three species together. It occurred far 

 up the quebrada Cristalina and throughout its course, as well 

 as at its mouth, where, and on the Diez-y-ses, it was associated 

 with caja and macropus. On the larger part of the quebrada 

 Sabaleticus, a beautiful gravelly stream six to twelve feet 

 wide, in original forest, with long pools and ripples, it occurred 

 in great numbers, without other Hetaerina competitors. It 

 was also abundant and was the only Hetaerina taken on the 

 quebrada La Camelia, after a short distance above the mouth. 



15. Cumuto, Trinidad. On the railroad between Arima 

 and Sangre Grande. The stream here, a tributary of the 

 Caroni, is in sand and gravel, clear, with low, short ripples. 



