The encroachment of the wood-worms in the bamboos which composed my hut developed itself into a nuisance of a fresh sort. To myself it was a matter of great indifference whether the building collapsed sooner or later, but just at present it was a great annoyance to me that all day long there should be an unceasing shower of fine yellow dust, which accumulated on everything till it lay as thick as my finger, and almost exceeded the bounds of endurance. Another noxious insect which was to be found in every hut was the Pillen-wasp (_Eumenes tinctor_). This was nearly two inches long, and had a habit of forming its nest in the straw right at the top of the circular roof. Associated with eight or ten others it made a huge cell, and flying in and out through the narrow doorway, which was the only avenue for light, it came into constant collision with my face. Its sting was attended by distracting agony far worse than the sting of any bee. Throughout the entire year I was baffled by these wasps, which were beautiful in colour, having wings of a fine violet blue. I made many attempts to destroy their ingeniously-constructed nest, and only succeeded after catching them in a butterfly-net and killing them one by one. Throughout the tropics the harmless kinds of lizards may invariably be reckoned amongst the settlers in every house. Prettily marked skinks (_Euprepes quinquelineatus_ and _E. pleurostictus_) enlivened my abode, whilst the graceful gecko (_Hemidactylus verrucalutus_) clambered up and down the walls just as frequently as in Egypt and in Nubia. But more numerous than all were the sociable agamæ (_Agama colonorum_), which kept nodding their heads, in a way that was extremely irritating to the Mohammedans, who fancied that it was the devil making fun of their prayers. I had previously repeatedly seen this species of the lizard in the overhanging rocky crags of the desert valleys on the Egyptian coast of the Red Sea; but here it appeared to lodge itself quite as freely in the huts as in the woods. The head of the male is of an orange-colour, and is easily detected from a considerable distance. Very ridiculous are their movements when any one approaches a tree upon which they are running up and down. They betake themselves to the farther side of the stem, and keep stopping at intervals, peeping out cunningly first from one branch and then from another, their large eyes beaming with a most knowing expression. Their favourite resort, however, in this district was the old woodwork of the palisades, and there they mustered in thousands.