Alysson Panzer 1806

Key to Alysson of China 1. Thorax more or less reddish brown or with yellow spot; free margin of clypeus with one or three denticles.............. 2 - Thorax wholly black, without reddish brown portion or yellow spot; free margin of clypeus with or without one or three denticles............................................................................................ 5 2. Pronotal collar with pair of yellow spots, free margin of clypeus with one denticle........ Alysson spinosus (Panzer), 1801 - Pronotal collar without yellow spot, free margin of clypeus with three denticles................................... 3 3. Prothorax and propodeum with bluish or violet metallic lustre; scutellum with yellow spot, clypeus yellow............................................................................... Alysson pertheesi formosanus Tsuneki, 1968 - Prothorax and propodeum without bluish or violet metallic lustre; scutellum reddish brown or with yellow spot, clypeus light yellow or reddish brown............................................................................... 4 4. Flagellomere I longer than II; scutellum wholly reddish brown; clypeus light yellow; basal half of gastral tergum I reddish brown.............................................................. Alysson yunnanensis Wu and Zhou, 1987 - Flagellomere I shorter than II; scutellum black, with yellow spot; clypeus reddish brown; gastral tergum I wholly and basal portion of tergum II reddish brown............................................... Alysson pertheesi Gorski, 1852 5. Propodeal enclosure with apex rounded; free margin of clypeus with one or three denticles; clypeus wholly or partly yellow. ................................................................................................... 6 - Propodeal enclosure sharply pointed at apex; free margin of clypeus with or without one or three denticles; clypeus black or wholly or partly yellow................................................................................ 8 6. Free margin of clypeus with three denticles; second recurrent vein received by junction of submarginal cell I and II; propodeal enclosure with about 16 oblique longitudinal rugae................................. Alysson verhoeffi Tsuneki, 1967 - Free margin of clypeus with one denticle; second recurrent vein received by submarginal cell II; propodeal enclosure with less than 10 oblique longitudinal rugae....................................................................... 7 7. Propodeal enclosure equal to about half length of propodeal dorsum, with two irregular oblique longitudinal rugae............................................................................ Alysson attenuatu s Wu and Zhou, 1987 - Propodeal enclosure as long as propodeum dorsally, with about 10 oblique longitudinal rugae.................................................................................................... Alysson taiwanus Sonan, 1940 8. Free margin of clypeus with one or three denticles; flagellomere I longer or shorter than II; clypeus wholly or partly yellow. ................................................................................................... 9 - Free margin of clypeus without denticles; flagellomere I shorter than II; clypeus black or wholly or partly yellow....... 11 9. Free margin of clypeus with one denticle; flagellomere I longer than II; second recurrent vein received by submarginal cell III.......................................................................... Alysson takasago Tsuneki, 1977 - Free margin of clypeus with three denticles; flagellomere I shorter than II; second recurrent vein received by submarginal cell II or III............................................................................................ 10 10. Second recurrent vein received by submarginal cell II; clypeus largely yellow, black mesally and apically.................................................................................. Alysson sichuanensis Wu and Zhou, 1987 - Second recurrent vein received by submarginal cell III; clypeus wholly yellow..... Alysson tridentatus Wu and Zhou, 1987 11. Thorax with blue metallic luster; clypeus yellow........................................................... 12 - Thorax without blue metallic luster; clypeus black or yellow................................................. 13 12. Thorax wholly with blue metallic luster; propodeal enclosure about as long as 5/6 of propodeal dorsum, with about six oblique longitudinal rugae; gastral tergum II without yellowish spot in male............... Alysson caeruleus Wu and Zhou, 1987 - Only pronotum and propodeum with blue metallic luster; propodeal enclosure as long as propodeal dorsum, with about 16 oblique longitudinal rugae; gastral tergum II with pair of round yellowish spots in male............................................................................................ Alysson cyanotaeniatus Zou and Chen, sp. nov. 13. Propodeal enclosure with about 4 oblique longitudinal rugae; second recurrent vein received by submarginal cell II............................................................................. Alysson carinatus Wu and Zhou, 1987 - Propodeal enclosure with more than eight oblique longitudinal rugae; second recurrent vein received by submarginal cell III. .................................................................................................. 14 14. Clypeus black, its middle portion flattened; legs black, except lower portion of fore and mid legs brown..................................................................................... Alysson nigrilabius Wu and Zhou, 1987 - Clypeus yellow or free margin yellowish brown, its middle portion slightly bulging; legs yellow or brown, except basal portion of coxae black...................................................................................... 15 15. Free margin of labrum straight medially; length of propodeal enclosure equal to about 4/5 of propodeal dorsum; long spot on lower frons laterally yellow.................................................. Alysson ratzeburgi Dahlbom, 1843 - Free margin of labrum with broad and deep depression medially; propodeal enclosure as long as propodeal dorsum; long spot on lower frons laterally light gray white................................... Alysson labrisectus Zou and Li, sp. nov.