黄纹鳞石蛾和宽羽拟石蛾生物学观察(毛翅目:完须亚目)

A study on biology of Lepidostoma flavum Ulmer and Phryganopsyche latipennis Banks (Trichoptera,Integripalpia)

通过室内饲养 ,首次发现黄纹鳞石蛾幼虫 ,并对其形态作了描述与绘图。对该种和宽羽拟石蛾的筑巢、弃巢、耐受力、取食及化蛹羽化等生物学习性进行了观察。探讨了黄纹鳞石蛾作为中国华中区东部和华南区以及宽羽拟石蛾作为中国东洋界华南区、华中区东部和古北界华北区、东北区清洁水重要指示生物的应用前景。

Larva of Lepidostoma flavum Ulmer was described and figured for the first time.The biology of larvae of L.flavum and Phryganopsyche latipennis was studied by rearing experiments in laboratory.The prospect of using these two species as bio indicators in clean water was also discussed.Final instar larva of L.flavum Ulmer.Eruciform.Head width 1 2 mm and body length 7 mm.Head light yellowish brown with small light colored dots scattered on posterior half.Antenna situated close to the eye.Pronotum concolorous with head,with posterior margin darkened;numerous fine setae on the anterior margin and with 5 setae on each half of the pronotum near the middle.Mesonotum light yellowish brown,apparently sclerotized,with 1,4,4 setae on Sa 1,Sa 2 and Sa 3 respectively.Metanotum broadly membranous,only weakly sclerotized at the base of Sa 3,with 1,1,6?7 setae on Sa 1,Sa 2 and Sa 3 respectively.Lateral hump presented on each side of 1st abdominal segment.Subdorsal and subventral tracheal gills single,lateral tracheal gills absent.Abdominal segment 1 with 2?5 tracheal gills,segments 3 and 7 each with only two pair of tracheal gills and abdominal segments 4 to 6 each with 4 pair of tracheal gills respectively.Lateral fringe composed of very fine setae,running through 3rd to 7th segments.Each side of 8th segment with one thick thumb like hump.