NORTH AMERICAN GEOTRUPINAE — HOWDEN 317 



Explanation of Plates 1-10 



Plate 1 

 Some adult Geotrupinae. Left row, top to bottom: Mycotrupes cartwrighti 

 Olson and Hubbell; Geotrupes splendidus miarophagus Say; Peliotrupes pro- 

 fundus Howden; and P. youngi, new species. Right row, top to bottom: 

 Bolbocerosoma cartwrighti, new species; B. riicheri, new species; B. pusillum 

 townesi, new subspecies; Eucanthus lazarxis subtropicus, new subspecies; and 

 E. alutaceus Cartwright. 



Plate 2 



1. Left eye canthus and lateral portion of clypeus of (a) Peltotrupes youngi, 



new species; (b) P. profundus Howden, (c) P. profundus dubius, new 

 subspecies. 



2. Left anterior angle of pronotum of (a) P. youngi, (b) P. profundus, (c) P. 



profundus dubius. 



3. Anterior pronotal margin of (a) P. youngi, (b) P. profundus, (c) P. profundus 



dubius. 



4. Outline cross section of anterior left elytral margin of (a) P. youngi, (b) 



P. profundus, (c) P. profundus dubius, 



5. Posterior edge of left paramere of male genitalia of (a) P. youngi, (b) P. 



profundus, (c) P. profundus dubius. 



6. Right eye canthus, eye, and antenna of Eucanthus lazarus subtropicus, new 



subspecies. 



7. Right eye canthus, eye, and antenna of E. lazarus lazarus (Fabricius). 



8. Diagram of first four striae of right elytron of E. lazarus subtropicus. 



9. Diagram of first four striae of right elytron of E. lazarus lazarus. 



10. Diagram of teeth on ventral surface of the left foretibia of male Geotrupes 



blackburnii blackburnii (Fabricius). 



11. Diagram of teeth on ventral surface of the left foretibia of male G. black- 



burnii excrementi Say. 



12. Diagram of dorsal surface of left foretibia of female G. egeriei Germar, showing 



longitudinal carina. 



13. Diagram of dorsal surface of left foretibia of female G. blackburnii blackburnii, 



showing longitudinal carina. 



14. Diagram of dorsal surface of left foretibia of female G. balyi Jekel, showing 



longitudinal carina. 

 Symbols: A, antenna; AT, anterior tooth; CL, clypeus; EC, eye canthus; LC, 

 longitudinal carina; PT, penultimate tooth; S, elytral suture; SP, row of seti- 

 gerous punctures; TC, transverse carina; 2E, second elytral interval; 4E, fourth 

 elytral interval. 



Plate 3 



1. Right lobe of male genital capsule of Bolbocerosoma tumefactum (Palisot de 



Beauvois) . 



2. Right lobe of male genital capsule of B. ritcheri, new species. 



3. Right lobe of male genital capsule of B. farctum (Fabricius). (Half the 



magnification of 1 and 2.) 



4. Right lobe of male genital capsule of B. cartwrighti, new species. 



5. Right lobe of male genital capsule of B. elongatum, new species. 



6. Right lobe of male genital capsule of B. pusillum Dawson and McCoUoch. 



(Half the magnification of 4 and 5.) 



7. Dorsal aspect of male genitalia of Peltotrupes youngi, new species. 



8. Tip of male genitalia of Geotrupes hornii Blanchard. 



9. Dorsal aspect of male genitalia of G. hornii. 



