蚜科一新属一新种记述：同翅目：蚜总科

本文记述中国蚜虫1新属——丁化长管蚜属Chitinosiphum,模式种为丁化长管蚜C.abdomenigrum,sp.nov.,其寄主为瑞苓草Saussurea nigrescens Maxim,产地为中国陕西。

DESCRIPTIONS OF ONE NEW GENUS AND ONE NEW SPECIES OF APHIDIDAE (HOMOPTERA: APHIDOIDEA)

In the present paper, one genus and one species of Aphididae from China are described as new to science. All the type specimens are kept in the Entomological Museum of the Northwestern Agricultural University.Chitinosiphum Yuan et Xue, gen. nov.This new genus is allied to Impatientinum Mordvilko, but differs from the latter in the following characters: (1) head with epicranial suture; (2) siphunculus much longer than cauda; (3) antenna with 3rd segment bearing rhinaria near basal 1 / 3; (in the latter rhinaria often distributed on 2/3 of the whole length of 3rd segment); (4) round spiracles (in the latter spiracles reniform). This new genus is also similar to Aulacorthum Mordv. and Silenoboum Born, but may be distinguished from the latter genus by head with epicranial suture.Type species: Chitinosiphum abdomenigrum Yuan et Xue, sp. nov.Chitinosiphum abdomenigrum Yuan et Xue, sp. nov. (fig. 1)Apterous viviparous female: body length 1.8-1.9mm, width 0.9- 1.0mm. proportions of length of 1st-6th antennal segments are 25 : 10 : 105 : 83 : 60 : 24+105. Head with epicranial suture. 1 seta on each antennal tubercle, front obviously protruded. All the abdomenal tergites sclerotized and black except the area near siphunculi. Siphunculus long and thin, with arced veins at its basal part and 2-3 rows of reticular veins at its terminal part, and with flange. Cauda tonguelike, shrinkage at .1 / 3 near basal part and with 4 setae.Syntype: 11 apterous viviparous female, Nanzheng County, Shaanxi Province, 29-IV-1988, specimen No. 88-17, collected by Xue Zengzhao.Host plant: Saussurea nigrescens Maxim.