On the Oriental leafhopper genus Takagioma Thapa, 1989 (Hemiptera: Cicadellidae: Typhlocybinae: Dikraneurini) with descriptions of six new species.

The leafhopper genus Takagioma Thapa, 1989 is recorded from China for the first time. Six species, T. pagoda Kang and Zhang, T. rostra Qin and Huang, T. gladius Kang and Zhang, T. curvata Kang and Zhang, T. anguis Qin and Huang and T. longicuada Qin and Huang spp. nov, are described and illustrated. A check-list and a key to all species of Takagioma are provided.

First record and new species of the Oriental leafhopper genus Trifida Thapa Sohi (Hemiptera: Cicadellidae: Typhlocybinae) from China.

The Oriental leafhopper genus Trifida Thapa Sohi, 1986 and T. quadripunctata are recorded from China for the first time. Three new species, T. eleganta, T. robusta and T. elongata spp. nov., are described and illustrated. A check-list and key to all species of Trifida are provided.

Contribution to knowledge of the genus Cuanta Dworakowska, 1993 (Hemiptera: Cicadellidae: Typhlocybinae) with descriptions of three new species.

The leafhopper genus Cuanta Dworakowska, 1993 is recorded from China for the first time. Three species, C. plana, C. curva. and C. centralis spp. nov., are described and illustrated as new to science. A check-list and key to all species of Cuanta are provided.

Review of the genus Sobrala Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Alebrini) with description of four new species and a new record from China.

The genus Sobrala Dworakowska is reported for the first time in China and a key to known species of the genus is provided. Four new species, Sobrala acanthophylla, S. dactylina, S. lamellaris and S. quadrilatera spp. nov. from China are described and illustrated.

Review of Michalowskiya Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Dikraneurini) with description of six new species from China.

A key to known species of the subgenus Michalowskiya (Michalowskiya) Dworakowska is provided. Detailed morphological descriptions and illustrations of six new species, Michalowskiya (Michalowskiya) aurantiaca, M. (M.) biprocessa, M. (M.) breviprocessa, M. (M.) brownistriata, M. (M.) longiprocessa, and M. (M.) pedata spp. nov. from China are provided.

[Effects of UV-radiation on biological characteristics of different body-color biotypes of Sitobion avenae (Fab.)].

UV-radiation exerts strong selection stress on the evolution of aphid populations, and thus, leads to their genetic differentiation. However, the effects of UV-radiation on different body-color biotypes of aphids are still ambiguous. In this study, new-born nymphae of red and green biotypes of Sitobion avenae were placed on two wheat varieties (Xiaoyan-22 and Astron), bred in an artificial bioclimatic chamber under strict controlled conditions (at 15 degrees C, 20 degrees C, and 25 degrees C, and treated with 30 W lamp of UV-B for 30 min per day for 5 days), and their development duration, mass, and mean relative growth rate were measured. The results showed that at lower temperature, UV-radiation delayed the growth of green biotype aphid on Xiaoyan-22 and Astron significantly; while at higher temperature, UV-radiation significantly delayed the growth of red biotype aphid on Xiaoyan-22, but had lesser effects on the growth of the two biotypes on Astron, illustrating that different biotypes of aphids had different responses to UV-radiation, and the responses were correlated to temperature and wheat varieties.