THE STAG BEETLES. 



905 



cc. Front of heart with a short bent horn, pointing forward; larger, 

 30 or more nun. V. PASSALUS. 



(Id. Form short, oval, convex, the sides not parallel; elytra coarsely punc- 

 tured, not striate, pubescent. VI. NICAGUS. 



I. LUCANUS Linn. 1763. (L., "to shine.") 



Large, smooth, brownish species with very prominent mandibles, 

 which are most strongly developed in the males. The mentum, as 

 in the next two genera, is very broad, completely covering the maxil- 

 la 1 . Three of the four known species occur in Indiana. 



KEY TO INDIANA SPECIES OF LCCANUS. 



(i. Mandibles of male as long as abdomen; female with black legs and 

 chestnut brown elytra. 1715. ELAPHUS. 



ad. Mandibles of male as long as thorax. 



b. Mandibles each with one tooth on the inner side; head of male 



broader than thorax ; femora light brown. 1716. DAMA. 



l)b. Mandibles straight, with several teeth on inner side in male, two 



ill-defined ones in female; heart of male not broader than thorax; 



femora dark brown or nearly black. 1717. PLACIDUS. 



1715 (5411). LTTANUS ELAPHUS Fab., 

 Syst. Ent.. 1708, 2. 



Dark chestnut-brown, shining; legs 

 and antenna 1 black or nearly so. Heart 

 of male much wider than thorax, with 

 a strong crest above the eyes ; mandi- 

 bles very long, widely forked at apex, 

 the inner edge with numerous small 

 teeth ; mentum of female comparatively 

 longer, much more quadrate and with 

 front angles much less rounded than in 

 those of female of dama. Antennae of 

 male more slender than in the other 

 species. Length of male (not including 

 mandibles) 31^10 mm. ; of female 

 28 mm. (Fig. 354.) 



A species of southern range, 

 represented in the collection by five 

 males and one female, taken in 

 Vieo, Monroe and Crawford conn- 



Fig. 354. Natural size. (After Fuchs.) 



ties. May 20-August 21. Occurs 



about old oak stumps, though sometimes in gardens. The females 



are very rare. 



1710 (5412). LrcANrs PAMA Thunb.. Memr. Mosc., 1800, 198. 



This species is sulliciently distinguished by the characters given in 

 key. It is the only one of the three which has light brown femora. The 



