Ague-Eever and no Q,utNiN:fci 
wailiug sound, retuni to the spot, and look in vain for tlie vanislied 
partner. This fond affection between the two ap^x^ars to be peculiar 
to the whol(! genus. It is strange that the companies of both species of 
Araras, A. nmcno and A. araratDKi, sliould keep strongly apart from one 
another: I cannot call to mind a single instance where one species was seen 
in the neighl)ourhood of the other. I*rince von Neuwied regarded this 
alleged segregation as a myth; — my brother and myself have to make 
the statement as the result of several years' exj)eiience. Besides the 
savannah Hokko-hen [Vrd.v toiiivntosa) the Crax olector was also fre- 
(piently sliot along tlie edge of tlie banks. It is renuirkable that during 
this irionth botli species emit a stiong onioinlike odour whicli permeates 
the flesh to which it gives an extremely piquant taste. It is highlv 
probable that certain kinds of seeds or fruits Avhich reach maturity this 
month are the cause of it, although the contents forthcoming in the 
crops of tlie dead l)irds furnished no ex})]auation (See. 1,()0*J). As we 
found such a plentiful su])ply of wild fowl liere, it was natural that we 
did not trouble aljout the equally large numbers of tongh Pcnrlopa 
pnraca that enlivened every ljami)u-bush on the embankment with their 
sharp pheasant-like call. 
58. For tlie past week I had bt-eu attacked with occasional bouts of 
ague-fever which unfortunately I coidd not stitle at tlieir onset because 
Mr. Fryer had forgotten to put the quinine in the medicine-chest when 
he left it behind with us on his return to Pirara. To-day this unwelcome 
visitor notified me of its actual presence to a fairly reasonable degree 
and I had to thank our forgetfulness for having to carry fever round 
with me over the whole Takutu tn'p, only succeeding in getting rid of 
it after we got back to Pirara . From an astronomical observation our 
cam]> since the 12th April was found to be situate in 3° 12' 51" Lat. N 
and 20.6 miles west from Pirara. 
59. The stream maintained its rocky character also on the followdng 
day; indeed it actually increased to such an extent, that isolated bould- 
ers now reaching a height of froni 20 to 80 feet, piled above and below 
one another, were lying scattered around in the riv<M--bed. INlt. Turata- 
wuiburi lay N. 73° E. from us: it also appeared to be the main direction 
of this granite layer. And though onr troubles' were accordingly many 
times woise than yesterday's, the aggravated mis(M-y of the sand-tlies 
( snndflici/r) kept pace with them. Just as in autumn sometimes a cold 
current of air unexpectedly penetrates the moisture-saturated atmos- 
phere and produces a sudden mist, we often found onrselves enveloped 
in a like cloud of flies. The blood-thirsty creatures then suddenly 
started attacking us in sv\'arms, and driving their strong sliort sucking 
Snouts into our skins so as to cause much pain that every moment became 
worse, the wretches finally filled themselves full. Wliile they suck, the 
skin rises like a half glol)ular swelling, becomes suffused with moisture 
that, mingling with the Idood when the insect has flown away, dries up 
after a while, and produces the red spot AVhich as T have already lu^ted, 
(Vol. I. 777) is visible for several days before falling off. So lonu' as 
the bit^^s remain isolated the irritation is always bearable b'lt V-Wvi 
these harpies come in such swarms as they did here, they are apt to caase 
