Cheirotonus formosanus (Ohaus) is an endemic species and the largest scarab beetle in Taiwan. Body length 50 - 65mm. Fore-legs length 90 - 100 mm in male, much longer than in female. Body color metallic dark-brown. Central of clypeus concave, outer edge slightly protruded with small processes on it. Pronotum with a wide central furrow and outer edge toothed. Elytra surface with scattered brown spots; Ventral of abdomen covered with short yellow hairs. Adults appear in May - October. Distribution: mountains throughout Taiwan. (Protected species II: Rare and valuable species)

 
Category： insect photo gallery
Chinese name：台灣長臂金龜(雄蟲)
Scientific name：Cheirotonus formosanus (Ohaus)
English name：Formosan long-armed scarab (male)
Author：Po Yen Chen

Category：teaching specimen
Chinese name：台灣長臂金龜(雌蟲)
Scientific name：Cheirotonus formosanus (Ohaus)
English name：Formosan long-armed scarab (female)
Author：Tsung ju Tsai
 

Department and graduate Institute of Entomology
National Taiwan University