Occasional Papers of the Museum of Zoology 43 



On this small stream I collected one specimen each of 

 Hetaerina macropus and miniata, three of pilula, and six of 

 titia. Larger series might have been collected, but I spent 

 most of my time at the pool collecting dragonflies of other 

 genera. 



45. Sevilla, Colombia. A station on the railroad between 

 Santa Marta and Fundacion. Elevation probably about 50 

 feet. Collected here only about an hour along an irrigating 

 ditch, on December 15, 1916, and took five specimens of 

 Hetaerina caja. 



46. St. Ann River, Port-of-Spain, Trinidad, reached by 

 the St. Ann street car line. Above the car line about a mile 

 the stream is very rocky and swift, w^ith only a few species 

 of dragonflies. Collected March i, 1912. 



Hetaerina macropus was more abundant on this stream 

 than on any other stream we collected in Trinidad, and it is 

 the only stream, where Hetaerinas occurred at all, on which 

 we failed to find caja. 



47. St. Joseph River, near St. Joseph, Trinidad, on the 

 railroad between Port-of-Spain and Arima. Stream similar 

 to the San Juan, eight to twelve feet wide, swift, gravel and 

 rounded stones, with some long, swift ripples. Collected Feb- 

 ruary 28 and March 11, 1912. 



Hetaerina caja and niacropus were common here, the for- 

 mer about five times more numerous than the latter. 



48. Tachira, Venezuela. Terminus of the railroad from 

 Encontrados on the Catatumbo River. Elevation about 1,200 

 feet. Tachira lies on the mountains back of La Fria where 

 the hills first begin. It is in a heavily wooded region of steep 

 or precipitous mountain sides with many streams. In the 

 deeper valleys are swift streams fifteen to thirty feet wide, 

 with pools and many rapids, but no waterfalls. The beds of 



