24 University of Michigan 



into the alley they usually meander as shallow, dirt-sided 

 arroyos which shrink in volume before the Rio Bejuma is 

 reached. We could not learn the elevation of Bejuma, which 

 is probably near that of Caserio Silva, about 1,500 to 2,000 

 feet. Like the Rio Chirqua, the Rio Bejuma eventually 

 reaches the Orinoco. Collected February 13-18 and 24, 1920. 

 Hetaerina caja was the commonest species at Bejuma and 

 was collected every day. It occurred on the Rio Bejuma and 

 the lower courses of the quebradas. Macropiis occurred on 

 the same quebradas, but higher up than caja, and fewer speci- 

 mens were taken. Of capitalis only three males and one 

 female were collected, and they were taken high up near the 

 sources of two quebradas. These are the same three species, 

 and the only species, taken also at Nirgua and San Esteban, 

 Venezuela, and Bolivar, Colombia. 



7. Bolivar, Colombia. Residence of Mr. O. L. Flye, about 

 five miles out from Santa Marta. Elevation about 50 feet. 

 From Bolivar the cart road has been extended about five 

 miles farther to La Tigrera, following up the Tamacal River 

 most of the way. This is the same Tamacal we collected at 

 Santa Marta, but between Bolivar and La Tigrera it is a 

 rapid, rocky stream, largely in shade, and its few permanent 

 tributaries are of the same general character. Most of our 

 collecting was done on these tributaries, as odonate life was 

 not abundant along most of the course of the Tamacal, where 

 rough and angular rocks, destitute of aquatic vegetation and 

 washed bare by the rapid waters, ofifered few opportunities 

 for aquatic larval life. The tributaries were less scoured and 

 had occasional pools with some semi-aquatic growths. The 

 elevation at La Tigrera is al)out 300 feet. Collected December 

 20-26, 19 16. 



