906 



FAMILY XLIX. — LI irANID.l';. 



(>lytra are smooth or very finely imnetuliite and the aiiteniuTe of male stouter 

 and comparatively shorter than in cJaphus; mandibles of male twice the 

 length of those of female. Length 22-35 mm. (Figs. 355-356.) 



Fig. 356. Natural size. (After Packard.) 



The larvffi live in old 



Fig. 355. Lucanus daina Fabr. Larva and cocoon. 

 (After Packard.) 



Throughout the State; fre- 

 quent. May 10-July 16. It flies 

 by night with a loud buzzing noise 

 and is attracted by electric or house lights, 

 oak, beech, apple, willow or oak snags, and the freshly matured 

 beetles are often found about the roots and beneath the bark of 

 these trees in May and June. This and the next species are the 

 ones commonly known as ' ' pinching bugs, ' ' as when picked up they 

 often grab the fingers with their protruding jaws and hold on with 

 a strong grip. 



1717 (5414). Lucanus placidus Say, Journ. Phil. Acad. Nat. Sci., V, 1825. 

 202; ibid. II, 302. 

 From (lama this species is known by the characters given in key and 

 by its piceous or very dark reddish-brown color. The mandibles are curved 

 only at tip, and they, as well as the entire upper surface, are more coarsely 

 and distinctly punctured. Length 19-32 mm. 



Throughout the State; more common than dama. May 1-June 

 20. Occurs at electric lights and is abundant in season along the 

 beach of Lake Michigan. 



II. DoRCus McLeay. 1S19. (L., "antelope.") 



Smaller, more parallel, and with the body more distinctly 

 pedunculate than in Lucanus. One species and two varieties are 

 known from the United States. 



*171S (5415). DoRCUs PARALLELUs Say, Journ. Phil. Acad. Nat. Sci., Ill, 

 1S23, 248 ; ibid. II, 146. 

 Oblong, parallel. Dark brown, nearly black. Head and thorax shin- 

 ing, finely and sparsely punctulate. Mentum strongly transversely striate, 

 male; rugose, female. Males with head nearly as broad as thorax; mandi- 



