Tarija» Below San Lorenzo, and above Tarija,the valley 
is terribly eroded and cut up by a tangles series of 
tortous ravines,and almost without vegetation, 
ihere have been found numerous fossils in this valley 
, The most abundant birds around San Lorenzo are 
Colxmbina picui,a veritable pest,also many Zenaida auri- 
culata,which annoy the collector much by continually 
flushing from all sorts of places and frightening away th' 
other birds. Si calis pelzelni is also very abundant 
and Molothrus semibadius . Guira guira also common,and 
in flock at this time,as are also Molot hrus and Sicalis 
We found Lesbia sparganura common in the Thorn Scrub 
feeding on the red,tubular flower of a parasitic plant, 
growing in clusters on the limbs of the Thorn,as does 
the Misteltoe, Back on the sides of the valley,on the 
higher portions,next the foothills,was taken Oreotrochili 
leucopleurus (?) (Ho record for Bolivia),but very few 
Lesbia w^ere ever seen with them. Strangely the females 
were entirely absent,but one being seen and taken. ’ 
A single specimen of Colibri iolatus and 1 b of 
Chlorostilbon aureo-ventris (?) were taken on a yellow tubi 
lar flower,of atall shrub,on east side of river.. 
Lepidocolapes and Knipolegus were also quite abundant 
as well* as Tricothraupis,Mimus' dorsalis and Serpop- 
haga subcristata,all four found mostly in Thorn scrub? 
Curiously enough,three species of Mmus were taken here, 
but only tv;o specimens were taken of trAurus . and but one 
of s_aturninus modulator .high up on the slope of the west 
side of valley. Leptasthenura fuliginiceps proved to be 
a bird of the trees,both in Thonn scrub and in other 
trees,not a habitant of low bushes,as are the others of 
the genus, Pitangus sulphuratus was common in the culti¬ 
vated lands,and along the water,but never seen on dry 
sections or far from water. 
Some species found to be very scarce here are probably 
stragglers out of their regular zone,and will be found mor^ 
more abundant lower down the valley. A few Larus serranus 
were seen along the pools on the stream bed,Ld one Xt 
for identification. But one Rail was seen,at a little 
marshy ditch formed by excess irrigation water near the 
river bank. Hothura maculosa was quite common,mostly in 
the cultivated lands,but also seen out on dry plains and 
in thorn scrub,but they are very difficult to secure 
without a dog. Will flush once,then hide,and must be 
practically stepped on before flushing a second time. 
According to information from residents here,there 
are some birds present here in the rainy season(Jan.Peb. 
are now absent. What they are, I cannot tel: 
migrants frSS^thP few, birds now here are 
mzgranps irom the south,but doubtleqc? c,nrr,= 
higher altitudes during the cold, dry seefs^^ come down from 
