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increased by the reverberation of the sun's rays from the steep 
rocky mountains, which, at the same time, prevent a free 
circulation of air; and, from the clearness of the sky, they are 
exposed after sunset to a sudden chill, while surrounded by 
a moist stagnant atmosphere in this confined situation. I 
was obliged to put up here on my return, and, although I 
had just recovered from a severe attack of the fever, I found 
no bad effects from sleeping in an open shed. 
The hills near Yazo are very steep, and the road occasion- 
ally very narrow, especially in one part, where it forms & 
mere ledge on the side of a nearly perpendicular hill. A 
pass of this sort is called a ladera. ‘The bank above, con- 
sisting of large rolled stones imbedded in gravel, bore 
evidence of the heavy rains in winter, being ploughed 
into numerous channels, and at that season it must 
dangerous to pass. From some of the loose earth giving 
way during the earthquake in 1828, a man and several 
mules were precipitated into the valley and killed. 
On approaching Yazo, some plants appeared by the road- 
side, and they became more abundant as we advanced, only 
a few, however, remained in flower. Two days ago we left 
the new grass- springing up on the coast; here the plants 
were shedding their ripened seed. In this neighbourhood, I 
found the white-flowered Loasa, Hoffnanseggia falcaria, and 
Convolvulus secundus, and in the valley where the road 
descends for a short distance, Malesherbia thyrsiflora and 
Lobelia biserrata, Cav. In the next two leagues, to Huari- 
mayo, the hills are partially covered with dry grass and other 
small plants, with occasionally a few shrubs. Several species 
of Browallia were in flower, the B. viscosa very common. In 
the valley, I found the red-flowered Salvia and Mentzelia 
aspera, and the rocks were covered with Tillandsie. 
JA Huarimayo, there was only a single hut, where travellers 
eey halt their mules, previous to passing a long and ele- 
ated ladera, called the Pacron. This is on the north side 
Bia stream which we had crossed, lower down, on a very 
"The riot X made of branches of trees laid from bank to bank. 
the hut is a botanical curiosity ; the whole surface 
