From mid-May to mid-June in average years, the moth is on the wing. The blossoms of the rhododendron are its favourite attraction, and the best time to see it at these flowers is on a nice sunny morning between ten o'clock and midday. The flowers of the bugle (_Ajuga reptans_) growing in meadows, wood-ridings, on railway banks or hedgerows, are hardly less attractive, but these are less easily worked than the higher shrubs. The collector has simply to stand before the latter and await the arrival of the active Bee Hawks. Among other flowers that this moth has been observed to visit are those of its own food plant; ragged robins (_Lychnis flos-cuculi_), ground ivy (_Nepeta glechoma_), and also blue-bell and primrose. The species is widely distributed and locally common throughout England, but its northern range does not extend apparently beyond Yorkshire. According to Kane it is absent from Ireland; and the reports of odd specimens from Scotland are probably erroneous. Its distribution abroad extends over Europe, except the most northern parts, a large portion of northern and central Asia, and southwards to North Africa. Moses Harris, it may be mentioned, figured this moth in 1775 as "The Clear-winged Humming-bird Sphinx." {55} THE NARROW-BORDERED BEE HAWK-MOTH (_Hemaris tityus_). This moth (Plate 21, Figs. 4, 5) has long been known as "_bombyliformis_" and was so mentioned by Haworth in 1802, but for some years past there has been a growing tendency to discard the name altogether, and as most recent authors follow Kirby's identification of this species as the _tityus_ of Linnæus, that name is here adopted. The chief characters separating this moth from the preceding are the narrow blackish borders of the wings and the absence of the black mark at the end of the cell of fore wings. It has been suggested that the female deposits its green oval eggs on the undersides of the leaves of devil's-bit scabious (_Scabiosa succisa_) whilst on the wing, but as she will lay freely in a box it is most probable that she settles on the plants when engaged in egg laying. The caterpillar (Plate 20, Fig. 1) is green, roughened with white points, from which tiny hairs arise; the green colour varies in tint from whitish to bluish; the lines along each side of the back are yellowish, and often have purplish red spots, or patches, upon them; the spiracles are set in purplish red patches, and the roughened reddish-brown horn is finely pointed. The under side is traversed by a purplish-red stripe. There is some modification in the reddish markings, both as regards number and intensity; these are well developed in the specimen from the New Forest figured on Plate 20. The caterpillars may be found in June and July on the under sides of the lower leaves of the scabious, and as they eat holes in the leaves these marks should afford a clue to their whereabouts.