8 E. B. Williamson 



West and north of the house at BoHvar on the east side of the road from 

 Mamatoca to Lavilla and south of Mamatoca was a large and varied swamp. 

 It was in both sun and shade and contained rank growths of bushes, sedges, 

 cat-tails, ferns often ten feet high, duck-weed, the spatter-dock-like plant 

 seen at ponds near Santa Marta, and a common thick-leaved, floating rosette 

 l)lant in which Corypliacschna vircns usually oviposited. Here dragonflies 

 were very numerous. Smaller pools occurred elsewhere in bush, mostly a 

 small spiny palm, but they were less varied and few dragonflies were found 

 about them. Along the Bolivar-La Tigrera road and in sheltered sunny 

 nooks Macrothemis flew in great numbers, and at sunset Gynacanthas in lim- 

 ited numbers came out of the brush to patrol the edges of the road. Where 

 this road crosses the Tamacal on a plank bridge one can leave the wagon 

 load and follow the old mule trail from that point to the house .-^.t Bolivar. 

 We found this trail shadier and more interesting than the main road, and 

 usually followed it in our tramps up and down the Tamacal. About four 

 miles from Bolivar, on the road to La Tigrera, an obscure foot path crossed 

 the Tamacal and passed back through the brush and over the hills to a 

 small banana planting. A beautiful little stream, a tributary of the Tamacal, 

 flowed past this planting. On low vegetation in sunny spots in this field w^e 

 took about twenty-five specimens of a small Progomphus found nowhere else 

 on the trip. Our work about Bolivar brought our collection up to 70 species 

 and 2,257 specimens. 



On December 27, we went by mule from Bolivar to Cincinnati, where, 

 through the kindness of Mr. Flye, we. were received as guests in his home. 

 Cincinnati is situated at an elevation of 1,371 metres. The distance by mule 

 trail from the end of the wagon road at La Tigrera to Cincinnati was ten 

 miles. Above La Tigrera the mountains were for the most part wooded 

 with only occasional clearings. Near the many permanent streams tree 

 and climbing ferns were numerous and conspicuous, and on many of the 

 banks were great expanses of flowering begonias. Coffee was being picked 

 at the time of our visit, and the many flowering Compositae gave one the 

 impression of autumn at home. We collected for five days about Cincinnati, 

 assisted at times by William Flye and W. L. Laux. Collections were made 

 along various streams from an elevation of 762 metres to 1,371 metres, 

 the lower elevations proving more productive. About Cincinnati we found 

 for the first time the peculiar dragonfly Allopodagrion, one of the coena- 

 grionines, which nevertheless rests on leaves, stones, logs or sand with wangs 

 as flatly spread as any gomphine. Here also we took at the smallest streams 

 a beautiful and erratic Aeshna, seen nowhere else. While there was no rain 

 during our stay at Cincinnati, great masses of clouds frequently obscured 

 the sun, often for long intervals, and at such times odonate life simply dis- 

 appeared and did not immediately reappear with the sunshine. Moreover 

 the deep canyons in which the streams flowed served to keep them shaded 

 except where some were exposed to the sun a few hours during the middle 

 of the day. Under such conditions all dragonflies became exceedingly wary 

 and sensitive to the slightest movements, and, by rising among the trees to 

 lofty perches far out of reach, sought to escape in the very direction in which 



