The two other moths of this genus are called Bee Hawks from their resemblance to the humble bee. They are very much alike, but may be distinguished by a difference in the width of the dark border of the wings; and are named Broad-bordered and Narrow-bordered respectively. The former is illustrated in the woodcut appended. The fore wings are transparent like those of bees, with a dark central spot and a broad reddish-brown hind margin. The base and costa are black and tinged with green. The hind wings are similarly coloured, but have no central spot. The body is olive-brown, with a broad reddish belt, and behind are tufts of hair, which are spread out when the insect flies, just after the manner of the tail feathers of a bird. The moth flies in May. [Illustration: FIG. 102.--THE BROAD-BORDERED BEE HAWK.] The larva resembles that of _Stellatarum_, but exhibits a violet tint above the legs. Its horn, too, is curved, and of a reddish or brownish colour. It feeds on the honeysuckle (_Lonicera Periclymenum_), ragged robin (_Lychnis Flos-cuculi_), evening campion (_L. vespertina_), red campion (_L. diurna_), lady's bedstraw (_Galium verum_), and the field scabious (_Scabiosa arvensis_), during the month of July. Family SESIIDAE--THE CLEARWINGS This family contains fourteen very pretty British insects that differ very much from other moths in many important and interesting particulars. Their antennae, like those of the _Sphingidae_, are thickest beyond the middle, and those of the males are slightly _ciliated_ or hairy. Their bodies are slender, and terminate behind in tufts of hair. The hind wings in all cases are transparent, margined and veined with black or brown; and the fore wings also, in most cases, have transparent bases. These moths delight in the hottest sunshine, and may be seen gracefully hovering over the flowers in our gardens, looking more like gnats, bees, and wasps, than moths. The larvae of these insects are all wood-eaters, and spend their time within the stems of shrubs and trees, eating out galleries in the material that forms both their food and their home. Within these they also undergo their changes, and do not expose themselves to the free air and light till they reach their perfect stage. _The Hornet Clearwing of the Poplar_ (_Trochilium Apiformis_) We can find space for a mention of only two of the clearwings, the first of which is an insect that closely resembles the dreaded hornet, and whose larva feeds in the stems of poplars--features which will account for the above name. [Illustration: FIG. 103.--THE HORNET CLEARWING OF THE POPLAR.] The head of this species is yellow, its thorax brown with a large yellow patch on each side, its abdomen yellow with two brown belts, and its legs reddish orange. The front wings are transparent, with brown costae, and all the wings are margined with brown.