Occasional Papers of the Museum of Zoology 35 



rocky stream, about ten feet wide, flowing directly into the 

 Caribbean Sea. Collected January 28-30, 1920. 



The only species taken on this fine little stream was Hetae- 

 rina macro pus. The absence of a coar:tal plain explains the 

 absence of caja, and the absence of iapitaUs from our Hst is 

 probably to be explained by our failure to reach the higher 

 sources of the stream. 



27. Maracas River, near St. Joseph, Trinidad. We col- 

 lected from the Maracas Fall, 340 feet high, down-stream sev- 

 eral miles. The upper part of the stream is swift and rocky; 

 the lower part, swift but slower, and gravelly. Collected 

 March 5, 1912. 



Hetaerinas were rare here, and we took only two speci- 

 mens of caja and three of inacropu-s. This, of all the places 

 we collected in Trinidad, was the most likely-looking for cap- 

 italis, but though we failed to find this species in the island, 

 it is not impossible it may yet be found high in the hills above 

 any of the stations visited by us. 



28. Maraquita, Colombia. On the railroad above Honda. 

 Elevation about 1,500 feet. Many fine streams are near town. 

 Some of these are rocky and swift, with high waterfalls and 

 steep, wooded banks. Others are generally swift, but with 

 much sand and without waterfalls. They vary in size from 

 tiny brooks to streams 30 to 40 feet wide. As usual, the 

 smaller streams were richest in dragonflies. Collected here 

 February 3-5, 1917. 



The Maraquita water supply comes from the San Juan 

 River. The intake is just above a high waterfall. Above the 

 intake the stream is three to six feet wide, ver)- rocky, with 

 some high waterfalls. Its banks are high and steep, with 

 many helioconias and large bamboos near the water, and high 

 trees. Along this upper stretch of the river we found Hetae- 



