中国蚜科梯管蚜属研究并记二新种(同翅目:蚜总科)

Study on the Genus Brachysiphoniella Takahashi with Description of Two New Species (Homoptera: Aphidoidea: Aphididae) from China

记述中国梯管蚜属 Brachysiphoniella Takahashi,1 92 1及该属 2新种 :食禾梯管蚜 Brachysiphoniella graminivora,sp.nov.,芹梯管蚜 Brachysiphoniella apiaca,sp. nov.,并给出分种检索表。模式标本存放在中国科学院动物研究所。

This paper deals with Brachysiphoniella Takahashi, 1921 and with description of two new species from China, viz: Brachysiphoniella graminivora Zhang et Zhang, sp. nov. and Brachysiphoniella apiaca Zhang et Zhang, sp. nov.. A key to Brachysiphoniella Takahashi is given. All the type specimens are deposited in the Institute of Zoology, the Chinese Academy of Sciences, Beijing. 1. Brachysiphoniella graminivora Zhang et Zhang, sp. nov. (Fig.1) Apterous viviparous females: Measurements (in mm): Body 1.907 in length, 1.062 in width. Antennae 5 or 6 segmented. Length of antennae with 5 segments: 0.837, segment Ⅰ～Ⅴ: 0.064, 0.048, 0.266, 0.148, 0.095+0.218. Antennae with 6 segments:1.010, segment Ⅰ～Ⅵ: 0.069, 0.052, 0.185, 0.155, 0.170, 0.104+0.230. Ultimate rostral segment 0.068, with a pair of accessory hairs and 3 pairs of primary hairs. Hind femur 0.366, hind tibia 0.594, 2nd hind trsal segment 0.089. Siphunculus 0.059 in length. Cauda 0.228 in length, with 16～19 hairs. Holotype: apterous viviparous female, No. Y2567 1 3, Kunming, Yunnan Province (1890 m, 102.7E, 25.0N) on Gramineae, 3-Ⅷ-1982, coll. Xia Zhehua. Paratypes: 7 apterous viviparous females, 1 alate larva, No. Y2567, other data same as holotype. This new species differs from B.montana by the following characters: 1) abdominal terga Ⅶ～Ⅷ pale (the latter dark brown); 2) 3 pairs of primary hairs on the ultimate rostral segment (the latter 2 pairs); 3) siphunculus smooth (the latter with grave design); 4) 16～19 hairs on cauda (the latter 12 hairs); 5) anal plate rectanglar, with hind straight (the latter curved), 20～25 hairs (the latter 14 hairs). 2. Brachysiphoniella apiaca Zhang et Zhang, sp. nov. (Fig. 2) Apterous viviparous females: Measurements (in mm): Body 1.612 in length, 0.908 in width. Head and prothorax combined. Antennae 5 segmented 0.823 in length, segment Ⅰ～Ⅴ; 0.073, 0.048, 0.253, 0.140, 0.095+0.214. Ultimate rostral segment 0.060, with 2 pairs of accessory hairs and 2 pairs of primary hairs. Hind femur 0.311 , hind tibia 0.505, and 2nd hind tarsal segment 0.083 in length. Siphunculus 0.046 in length. Cauda 0.217 in length with 14～15 hairs. Alate viviparous females: Measurements (in mm): Body 1.555 in length, 0.612 in width. Head and prothorax separated. Antennae 6 segmented 0.972 in length, segment Ⅰ～Ⅵ: 0.071, 0.048, 0.202, 0.154, 0.179, 0.097+0.218. Secondary rhinaria on segments Ⅲ～Ⅳ each with 11～15 and 1, convex. Ultimate rostral segment 0.061. Hind fe mur 0.286 , hind tibia 0.563 , and 2nd hind tarsal segment 0.084 in length. Siphunculus 0.038. Cauda 0.158. Other data same as apterous viviparous females. Holotype: apterous viviparous female, No. Y1730 1 1 1, Liangshang, Sichuan Province (2500 m, 102.2E, 27.9N) on Apium graveolens L., Umbelliferae, 24-Ⅷ-1979, coll. Rao Yonghua. Paratypes: 5 apterous viviparous females, 2 alate viviparous females, No. Y1730, other data same as holotype. This new species differs from B. montana by the following characters: 1) abdominal terga Ⅶ～Ⅷ pale (the latter dark brown); 2) 2 pairs of accessory hairs on the ultimate rostral segment (the latter 1 pair); 3) siphunculus smooth (the latter imbricated); 4) 14～15 hairs on cauda (the latter 12 hairs); 5) anal plate rectanglar with margin straight (the latter curved), 19～26 hairs (the latter 14 hairs); 6) head and prothorax combined (the latter separated); 7) secondary rhinaria of alate viviparous females on segments Ⅲ～Ⅴ each with 11～15, 1, 0 (the latter 28～50, 20～25, 12～15). This new species is also similar to B. graminivora, but differs from the latter by the following characters: 1) head and prothorax combined (the latter separated); 2) median tubercles convex, lateral frontal tubercles distinct (the latter discernible); 3) antennae 5 segmented of apterous viviparous females (the latter 5 or 6 segmented); 4) 2 pairs of accessory hairs on the ultimate rostral segment (the latter 1 pair).