A Collecting Trip to Colombia 17 



stream flowed largely through pasture and brush land, but above the intake 

 it flowed in forest. Here it was only one to three feet wide and was fre- 

 quently lost in the stony gravelly bed. It had its origin in the hills about 

 a mile above the intake. The richness and peculiarity of its dragonfly fauna 

 may be realized from the fact that our first day's collecting yielded a 

 Miocora, two species of Palaemnema, a Perilestes, three protoneurines, three 

 Heteragrions, a Philogenia, an Allopodagrion, an Acanthagrion, a Megalopre- 

 pus, two Mecistogasters, and numbers of Argias, Hetaerinas, and libellulines. 

 At a later date, collecting along the quebrada in the brush between the town 

 and the forest we found two species of gomphines. Below town the rail- 

 road followed the Quebrada Cristalina more or less closely. About midway 

 between kilometer posts 26 and 27 was a path to the left, past a single native 

 hut in a field. This path brought us to the Rio Diez-y-ses, where it was 

 bridged by a large log. Just above this foot bridge was the mouth of 

 Quebrada Cristalina. 



The Rio Diez-y-ses above the foot bridge was largely in forest. It was 

 a fine stream fifteen to thirty feet wide, of varied character, with mud, 

 sand, rocks, long pools and some rapids. Beyond the foot bridge over the 

 Diez-y-ses was an abandoned railroad spur, running back at right angles 

 to the stream. Following this spur to its end and taking the trail which 

 skirted the forest, with brushy pasture on the right hand, we came to the 

 Quebrada Sabaleticus, about three-fourths of a mile from the Diez-y-ses. 

 This quebrada, in the forest, was a wonderfully fine stream six to twelve 

 feet wide with frequent long pools and rapids. The firm footing, the beau- 

 tiful and varied scenery;, and the rich fauna made collecting here almost ideal. 

 Here for the first time we saw Cora and observed its peculiar habit of 

 ovipositing, which it shares with Miocora. The eggs are inserted in com- 

 paratively solid but barkless horizontal tree trunks or pieces of logs over 

 water. In some cases the logs were scarcely damp, and the eggs were placed 

 as high as six feet above the water. At least three species of gomphines 

 lived along Sabaleticus, and no less than four Heteragrions. 



Following the Sabaleticus up stream one and a half or two miles from 

 where it emerges from the forest into the brushy pasture we came to a 

 waterfall between four and five feet high — the highest waterfall we dis- 

 covered on this quebrada. About a quarter of a mile above this waterfall 

 a very small tributary from the right enters the quebrada. We followed 

 this tributary to its source in the hills. About a half mile back from its 

 mouth, standing at an angle of 6o°-90°, is a broken rock face over which 

 water dripped. Here and here only we found Mesagrion, hitherto known 

 from a single male specimen, which, while closely related to Heteragrion, 

 has the peculiar habit of resting with wings closed, and not half opened as 

 one would expect from its relationships. 



Below kilometer post 25 and on the left side of the railroad track was a 

 cattle chute, from which a trail led to a clump of farm houses in a brushy 

 j'lasture on the right bank of the Rio Diez-y-ses. A short distance below 

 the cattle chute was a gate and another more distinct trail which brought 

 us to the same destination. If we crossed the Rio Diez-y-ses at this point 



