. The Cambridge natural history. Zoology. 474 NEUROPTERA. curious nature, and usually attract more attention than do the creatures they serve to protect. The Phryganeidae form the division or series Trichoptera; the two terms are therefore synonymous; those entomologists who consider these Insects to form a distinct Order use the latter appellation for it. The perfect Insect, though the wings are usually ample, has hut feeble powers of flight, and rarely ventures far from the water it was reared in ; it has a moth- like appearance, and the wings in repose meet, at an angle, in a roof-like mann
. The Cambridge natural history. Zoology. 474 NEUROPTERA. curious nature, and usually attract more attention than do the creatures they serve to protect. The Phryganeidae form the division or series Trichoptera; the two terms are therefore synonymous; those entomologists who consider these Insects to form a distinct Order use the latter appellation for it. The perfect Insect, though the wings are usually ample, has hut feeble powers of flight, and rarely ventures far from the water it was reared in ; it has a moth- like appearance, and the wings in repose meet, at an angle, in a roof-like manner over the back (Fig. 326, E). The head is small, with the front in- flexed ; it has two large compound eyes, "i ' and usually three ocelli; the antennae FiH. ?,2Q.—nydropiiia amgustdia are slender,thread-like, and Occasionally 9. Britain. (Alter M'Laclilau.) . n . i mi i i-j i attain a great length. I he parts of the mouth are very peculiar, the lahrum and the palpi—especi- ally the maxillary palps—being well developed, while the lobes of the maxillae and labiiim are amalgamated and therefore indistinct. The labrum is more or less elongate, and is more mobile than is usual in mandibulate Insects ; it is held closely applied to the maxillae. These latter are small, have usually only a single small free lobe; they are united to one another and to the labium by membrane in such a manner as to form a channel along the middle of the mouth, the labrum forming the roof of this channel. The palpi are in some cases (Sericosto- matides) of a remarkable nature; their joints vary in number from three to five, and differ sometimes in the sexes of the same species. The lower lip appears as a plate supporting the labial palpi, which are three-jointed and do not exhibit any peculi- arities of structure comparable with those we have mentioned as so frequently existing in the maxillary palps. Difference of opinion exists as to the mandibles, some entomologists declaring them to be e
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