1120 The American Naturalist. [December, 
EXPLANATION OF PLATES. 
Pirate XLI. 
Stemmatoiulus bellus—Fig. 1. Gnathochilarium of male; 2. Part 
of same, more magnified ; 3. Gnathochilarium of female; 4. Antenna 
of male; 5. First pair of legs of male, posterior view; 6. Second pair 
of male legs, anterior view; 7. Same, posterior view, showing also the 
external seminal duct; 8. One of the second male legs, lateral view, 
more magnified ; 9. Same, posterior view ; 10. Third leg of male, pos- 
terior view ; 11. Fourth leg of male, posterior view; 12. Fifth leg of 
male, anterior view; 13. Sixth leg of male, anterior view; 14. Tenth 
leg of male, anterior view; 15. Male genitalia, anterior view; 16, 
Same, posterior view. 
Puate XLII. 
Stemmatoiulus bellus—Figs. 17. Anterior pair of legs of a segment 
from the middle of the body, anterior view; 18. Posterior view of basal 
portion of same; 19. Posterior pair of legs from same segment; 20. 
First four segments, ventral face; 21. Lateral and ventral portion of 
a segment from the middle of the body, showing the pleural suture ; 
22. Mandible; 23. Head, lateral view, showing antennal socket, two 
large ocelli, mandibulary stipes and gnathochilarium; 24. Dorso- 
lateral part of a segment, showing the median line at the left, the 
sculpture, repugnatorial pores, and three sete; 25. Last three seg- 
ments, dorsal yiew; 26. Same, ventral view ; 27. Same, lateral view ; 
28. First pair of legs of female, posterior view ; 29. Second pair of legs 
of female, posterior view; 30. Third pair of legs of female, posterior 
view; 31. Fourth pair of legs of male, anterior view. 
Prate XLIII. 
Stemmatoiulus pencillatus.—Figs. 32. Antenna of male; 33. Gna- 
thochilarium of male; 34. Leg of first pair of male; 35. Second 
male leg, anterior-lateral view ; 36. Second pair of male legs, posterior 
view, showing also the exterior seminal duct; 37. Third pair of male 
legs, posterior view ; 38. Apical joints of same, more magnified ; 39. 
Fourth pair of male legs, basal joints, posterior view; 40. Fifth pair 
of male legs, anterior view; 41. Sixth male leg, anterior view; 42. 
Seventh male leg, anterior view; 43. Male genitalia, anterior view; 
44. Same, posterior view; 45. Labrum, exterior view; 46. Same, inte- 
rior view. 
Puate XLIV. 
- Stemmatoiulus calvus.—Figs. 47. Gnathochilarium of male; 48. 
Antenna; 49. First male leg; 50. Second male leg, anterior face; 51. 
