中国裸齿角石蛾属三新种(毛翅目,齿角石蛾科)

描述了裸齿角石蛾属3新种,即脊状裸齿角石蛾Psilotreta vertebrata sp.nov.(广东)、方背裸齿角石蛾Psilotreta cuboides sp.nov.(云南)和凹入裸齿角石蛾Psilotreta excavata sp.nov.(江西)。模式标本保存于南京农业大学昆虫标本馆。

DESCRIFHONS OF THREE NEW SPECIES OF PSILOTRETA (TRICHOPTERA,ODONTOCERIDAE) FROM CHINA

Three new species of the genus Psilotreta, are described and illustrated, i.e. P.vertebrata sp. nov.(from Guangdong), P.cuboides sp. nov.(from Yunnan) and P.excavata sp. nov.(from Jiangxi). The authors examined specimens deposited in Nanjing Agricultral University, and 25 species of the genus Psilotreta were identified. Based on the examination of Chinese materials, we found that the length proportion of each segment of maxillary palpus, and venation can help to classify species groups. Three venation types of Chinese Psilotreta were recognized: 1) forewing with discoidal cell (DC) (in most species); 2) forewing without DC, because of the base of R4 5 absent (in 3 species); 3) forewing without DC, because of R3 4 5 with the same petiole (in 1 species). Venation of the Nearctic Region species all fall on the type I, except forewing of Chinese species without Cu2 (Fig.1) or with only the vestigial trace at its base or end (Fig.3), forewing of North America species with Cu2 present (Schmid, 1998). The type specimens of the new species are deposited in the Insect Collection of Nanjing Agricultural University.