of Exotic Species of Lucanida. 437 



base of the mandibles, mentum and palpi seen from front ; 5 e„the 

 maxilla; 5d, the mentum and labial palpus; be, the antenna. 



PLATE XVI. 



Fig. 6— 6e. 

 Dorcus adspersus, and details: — 



Fig. 6. The insect magnified; 6a, the mentum, external bases of the 

 maxillae, palpi and mandibles closed; 6 6, the maxilla; 6 c, the 

 mentum and labial palpi ; 6 d, the antenna ; 6 e, the fore-tibia. 



¥\g.7—7h. 

 Hotnoderus Mellyi, Parry. Male. 



Fig. 7. The insect of the natural size ; la, the right side of the head seen 

 from above ; 7 b, the underside of the head, with the menlum and 

 labium removed, showing the maxilla, base of mandibles and base 

 of antennae ; 7 c, the maxilla; Id, the mentum; 7 e, the labium 

 and labial palpi; 7/, the eye ; 7 g, the terminal joints of the an- 

 tennae; 7 h, the middle tibia. 



Fig. 8 — 8e. 

 Uiimoderus Mellyi, Parry. Female. 



Fig. 8. The female of the natural size; 8a, the labrum and mandibles; 

 8 b, the mentum ; 8 c, the extremity of the antennae ; 8 d and 8 e, 

 the extremity of the fore-tibia. 



Note. — It has been suggested to me that the insect described at p. 430, under 

 the name of Sinodendron ? areolatum, may be identical with Ceratngnaihus Helo- 

 toides of Mr. Thomson's recently published Treatise on Lucanidiz ; but the insect 

 I have described does not even belong to the same sub-family as Ceratognathus, 

 and it has not the most remote resemblance to a Helota. If it should neverthe- 

 less prove identical, I contend that such unintelligible nomenclature and de- 

 scription disqualify the retention of Mr. Thomson's name. — J. O. W.,Jan. 1863. 



