LUCANUS. -H 



5 (4) Front tibia forked or dividc-ci at the 



end. 



6 (7) Club of the antenna composed of five 



or six joints Hexarthkius, p. 67. 



7 (6) Chib of the antenna composed of 



three joints. 



8 (9) Pronotum widest at the front margiii 



and abni])tly narroweil at the base. Gn-.\I'U.\i.ory.x, p. 75. 



9 (8) Pronotum not widest at the front 



margin and abruptly narrowed at 



the base ' DoKt us, p. 77. 



10 (1) Eyes completely divided. 



11 (14) Four posterior tibia? bearing lateral 



spines. 



12 (13) Eyes extremely small ; four posterior [p. 173. 



tibi« dilated at the end AuLAtoSTETHrs, 



13 (12) Eyes not extremely small ; four pos- 



terior tibiae not dilated at the end. . ^Egus, p. 174. 



14 (11) Four posterior tibiae without lateral 



spines. 

 1.1 (16) Pronotum with lateral and hind angles. Calcodes, p. 184. 

 16 (15) Pronotum without lateral or hind 



angles Heterochthes, p. 211. 



Genus LUCANUS. 



Liicanus Scopoli, Entom. Camioliea, 1763, p. 1 ; Lacord., Gen. CoL 

 iii, 1856, p. 22; Parry, Trans. Ent. Soc. Lond. (3) ii, 1864, 

 p. 71 ; Planet, Essai ^lonographique sur les Coleopteres des 

 genres Pseudolucane et Lucane, 1898-1899. 



Pseudolucanits Hope & Westw. (subgenus). Cat. Luc. Col. 1845, 

 p. 30 ; Planet, op. cii. pt. 1, p. 9 ; Arrow, Trans. R. Ent. Soc. 

 Lond. Ixxxiii, 1935, p. 106. 



Type, Lucanus cervus L. 



Range. Europe, Continental Asia, Japan, Formosa, North 

 and Central America. 



Body clothed with hair beneath, the hair usually rather long 

 and thick on tlie metasternum, the upper surface generally 

 more or less clothed with very fine close-lying greyish hair, but 

 sometimes almost naked. Front tibia with lateral teeth and 

 terminal fork, the middle tibiae always and hind tibise almost 

 always bearing two or more lateral spines, their extremities 

 acutely trilobed in the females (and sometimes also in the 

 males). Claws and pulvillus long. Antenna with the club 

 usually composed of four, but sometimes of more, joints. 

 Eyes prominent, only divided in front. INIaxilla with long, 

 slender and very hairy outer lobe, the inner lobe without 

 chitmous hook ; maxillary ])alpus with the 2nd joint slender, 

 3rd short, 4t]i rather long! Mentum semicircular, ligula long,, 

 terminating in two si)atulate, scarcely diverging lobes ; labial 

 palpus with the 1st joint long, 2nd short, 3rd elongate 

 oval. Frosternum rounded behind and sometimes a httle 

 compressed. 



