34 Mr. H. Durnford on some Birds observed 
T/enioptera rubetra. 
Rare. During my visit I saw only two examples, one of 
which I shot on the 6th November. It proved to he a male, 
with considerably enlarged testicles; and its stomach con¬ 
tained the remains of small beetles. 
LlCHENOPS PERSPipiLLATUS. 
Very common throughout the valley, nesting in the sides 
of tufts of Pampas-grass along the banks of the river. From 
three nests I found during my visit, in every case I flushed a 
rufous-plumaged bird. Here, and at Chuput, I have now 
dissected four rufous birds, which in all cases proved to be 
females, whilst two black specimens examined were both 
males. The black bird I have seen many times chasing the 
rufous ones ; in fact one can scarcely take a walk in the 
country here during the spring, where there is any swampy 
land, without observing this. 
Hapalocercus flaviventris. 
Not uncommon amongst the willows along the banks of 
the river. 
ANjERETES parulus. 
Rare. During my visit I observed two pairs amongst 
thick bushes, and obtained a male and female; the former 
has a decided black crest. On the 7th November I took a 
nest from a thick thorn-bush, about three feet from the 
ground, composed of grass, warmly lined with feathers, and 
containing two eggs, white in colour, and measuring *6 by 
*4 of an inch. 
Cyanotis omnicolor. 
Pretty common in marshy places wherever the reeds grow 
to the height of three or four feet, and probably breeding, 
though I did not discover the nest. From its brilliant and 
many-coloured hues of plumage, this is one of the most at¬ 
tractive birds we have ; and as it carefully works through 
every patch of reeds in search of insect food, now hanging 
head downwards from a spray, displaying its crimson crest, 
and the next minute running nimbly up a reed, it certainly 
reminds one of our Tits at home. 
