OF THE DOR-BEETLE. 95 



In this short description of the Dor-beetle, I have not 

 attempted in any way to exhaust the subject, or even to note all 

 the various parts of its external anatomy, but merely to give a 

 general idea of the plan on which it is constructed, and to direct 

 attention to a few of its more peculiar features. 



EXPLANATION OF PLATES XL, XIL, XIII. 



Plate XL 

 Fig. 1.— Upper side of half the head;— «., antenna; 6., band of 

 chitine protecting the eye ; c. , clypeus ; e. , the eye ; Ibr. , 

 labrum ; m., mandible. 

 ,, 2. — Under-side: — a., antenna resting in cavity of prosternum ; 

 b., band of chitine protecting the eye; e., the eye; m., 

 mentum ; lb., labium; 2^., labial palpus; mx., maxilla; 

 mx.p., maxillary palj^us. 

 ,, 3. — Half the under-side of the labrum. 

 ,, 4. — Mandible, under-side. 

 ,, 5.— An enlarged portion at 6., which consists of about 30 ridges 



of chitine, striated transversely. 

 ,, 6. — Posterior femur of female. 

 7. — Ditto of male. 



8. — Anterior tibia and tarsus of male. 

 9.— Ditto female. 



55 

 55 

 55 



Plate XIL 

 The Dor-Beetle, Geotrupes spwiigrer— female— upper-side, dissected. 



Plate XIII. 

 The same under-side, dissected. 

 The following numbers refer to the same organs in both plates:— 

 1.— Head. 11.— Labium. 



2.— Prothorax. 12.— Labrum. 



3.— Meso- and Meta thorax. 13.— Maxilla. 



4.— Abdomen. 14.— Mandible. 



5.— Anterior leg. 15.— Coxa. 



6. —Intermediate leg. 1 6. —Trochanter. 



7.— Posterior leg. 17.— Femur. 



8.— Elytron. 18.— Tibia. 



9.— Membranous Wing, extended. 19.— Tarsus. 

 10.— Ditto ditto, folded. 20.— Scutellum. 



