内蒙古沼泽蝗属一新种记述(直翅目:斑翅蝗科)

记述采自内蒙古地区斑翅蝗科昆虫1新种,即红股沼泽蝗Mecostethus rufifemoralis, sp. nov.,模式标本保存于陕西师范大学动物研究所昆虫标本室及河北大学博物馆.

A New Species of Mecostethus Fieber (Orthoptera: Oedipodidae) from Inner Mongolia of China

In the present paper,one new species of the genus Mecostethus Fieber is described. Type specimens are kept in the Institute of Zoology,Shaanxi Normal University and Museum of Hebei University.Mecosstethus rufifemoralis,sp. nov. (Figs. 1～4)The new species is allied to Mecosstethus angustatus Zhang,1984 and M. magister Rehn,1902. It differs from both in: 1) lateral keels only slightly obvious before anterior transverse sulcus of pronotum;2) with a small indentation in the middle of hind margin of pronotum;3) dorsal view,apex of subgenital plate flat;4) lower side of hind femur red;5) hind tibia orange yellow,basal,middle and apex of tibia black. It also differs from the latter in: 1) width of costal area of elytra slightly larger than width of cubital area;2) apex of lower kneelobe narrow rounded;3) length of middle segment of antenna 1.7 times as its width.Length of body (♂): 23～25 mm;length of pronotum: 4 mm;length of elytra: 21～23 mm;length of hind femur: 13.5～14 mm.Holotype: ♂,Ewenkizu Zizhiqi,Inner Mongolia,China,119o5'E,49o1'N,22-Ⅷ-2008,collected by SHI Fu-ming;paratype: 2♂♂,same date as holotype.Etymology: The specific name is derived from the Latin "ruf" and "femor".