. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST., 4: 1991 Nemopteridae Ascalaphidae Myrmeleonidae Nymphidae Psychopsidae Apochrysidae Chrysopidae * Hemerobiidae * Polystoechotidae Mantispidae Dilaridae Berothidae Osmylidae * Sisyridae * Coniopterygidae * Ithonidae Fig. 1. The phylogeny of the British Neuroptera (after Aspock et al., 1980). The families represented in the British Isles are denoted*. are a familiar pest of both indoor and garden plants. However, the venation of the wings serves at once to separate Coniopterygids from the al
. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST., 4: 1991 Nemopteridae Ascalaphidae Myrmeleonidae Nymphidae Psychopsidae Apochrysidae Chrysopidae * Hemerobiidae * Polystoechotidae Mantispidae Dilaridae Berothidae Osmylidae * Sisyridae * Coniopterygidae * Ithonidae Fig. 1. The phylogeny of the British Neuroptera (after Aspock et al., 1980). The families represented in the British Isles are denoted*. are a familiar pest of both indoor and garden plants. However, the venation of the wings serves at once to separate Coniopterygids from the almost veinless white-flies. The venation also provides evidence of the close relationship of the family, within the Planipennia, to the Hemerobiidae (Fig. 1). Another distinguishing feature is the presence of white or grey 'wax' which covers body, wings and all other appendages. Locating the nocturnal adults is considerably easier than finding the earlier stages. The egg ranges from to mm in diameter and is laid on the plant which is host to the larval prey. They are usually laid singly. A small conical projection, often upturned can be discerned at the anterior end. Their colour is white, though in some species they tend to be tinged pink or yellow; this does not seem to be constant. In the genus Coniopteryx they darken a few hours before hatching but in the other species (excluding Aleuropteryx juniperi and Helicoconis lutea which I have never seen) they remain white throughout. In common with all other British Neuroptera there are three larval instars. The first ecdysis takes place after about 4-5 days and seems to depend on the supply of food available to the larva, occurring later when food is in short supply. The larva attaches itself to the substrate by exuding a sticky fluid from the anal end and emerges through the dorsal surface of the old skin. The second instar generally lasts about 2 weeks and again seems dependent upon food supply. In the third instar the l
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