The third species of this genus which is a regular summer migrant to this country is the Grasshopper Warbler, so called from its peculiar sibilant note. In its general appearance it is most like the Sedge Warbler, but is larger in every way, and has the upper part of the plumage more variegated, no superciliary streak, and the throat minutely spotted. This last feature, however, is peculiar to the male. In habits, haunts, and in the character of its nest and eggs, the Grasshopper Warbler differs entirely from the two species above mentioned. It delights in a dense undergrowth or thick hedge-bottom, where it creeps about more like a mouse than a bird, and is extremely difficult to catch sight of, pausing at intervals to seize an insect or to give forth its remarkable note. Its well-made and compact nest, so different from the slovenly structure of the Sedge Warbler, is placed upon the ground, and carefully concealed. The eggs, five or six in number, are amongst the most beautiful of small birds’ eggs. When blown they are white, minutely freckled over with brownish-red; but before the yolk has been expelled they are suffused with a delicate rosy tint, which afterwards unfortunately disappears. The Grasshopper Warbler is a regular summer visitant to Ireland, and is also found in the south of Scotland. Its retiring habits probably cause it to be overlooked, and were it not for its loud note it would doubtless often escape notice altogether. It does not appear to be anywhere a numerous species, and its geographical distribution has not been yet clearly defined. It is observed in Southern Europe at the periods of migration, and we may therefore presume that it accompanies its congeners and other small summer migrants to North Africa, Asia Minor, and Palestine.