2. PLATE XIII. 



EUTHEMISTO LIBELLULA. 



The flagellum of the first pair of antennas. 9(^''/]). 



A piece of the upper margin of tlie same. 9 C/i)- 



A piece of the under » » » » $ (*Vi)- 



The apex of the first pair of antennas in a 



young female ('"/i). 



The apex of the second pair ofantennce. $ (■'"'/i)- 



The labrum. ef (i^/i)- 



The left mandible. c^ ('^/J. 



The apex of the same. c/' (^Vi)- 



The incisive lamina of the same. cf^ ("Vi)- 



A piece of the margin of the mohir tubercle. 



cT (-«%). 



A tooth from the same margin, o^ (^""li)- 



The apex of the last joint in the mandibuiar 



palp. (30/j). 



The first pair of maxilla. (f ('^/j). 



The apex of the secondary lamina of the same 



pair. d" eVi). 



The second pair of maxillffi. (f ('-/i)- 



The apex of the secondary lamina of tlie same 



pair. o" (ä%). 



The maxillipeds seen from behind. ef ( ''/])• 



A piece of inner margin of the left lateral 



lamina in the maxillipeds. ef CVi)- 



The maxillipeds from the inner side. 0^ (''/i)- 



The maxillipeds from the side. o^ C'^/i)- 



The apex of the median lobe in the maxillipeds. 



ef (^Vi). 



Branchial säck and ovitectrix from the fifth 



pair of peraeopoda. $ ('Vi)- 



The first pair of perreopoda. ef C/i). 



The third » » >> Young ef (^"A)- 



The fifth » » » ef (^'i); 



The dactylus of the same pair. ef (''''/i)- 



The fifth pair of perteopoda. Young ef (^%)- 



The dactylus of the same pair. Young ef ('""/i)- 



The seventh pair of perseopoda. Y^^oung ef ('^"/i)- 



The first pair of pleopoda. ef ('/])■ 



The urus. Young ef ("Vi). 



EUTHEMISTO COMPRESSA. 



» 32. The apex of the second pair of antennse. ef 

 » 33. The first pair of perseopoda. (f (^%). 



Fig 



. 1. 



,) 



2. 



^ „ 



3. 



» 



4. 



» 



5. 



» 



6. 



» 



7. 



„ 



8. 



» 



9. 



» 



10. 



» 



11. 



» 



12. 



» 



13. 



» 



14. 



„ 



15 



» 



16. 



„ 



17. 



» 



18. 



» 



19. 



» 



20. 



» 



21. 



» 



22 



» 



23 



» 



24 



n 



25 



» 



26 



» 



27 



» 



28 



» 



29 



» 



30 



» 



31 



Fig. 34. The apex of the carpal process in the second 



pair. ef ('-»/i)- 

 » 35. The hind margin of the carpus in the third 



pair. ef (""'/i)- 

 » 36. A piece of the metacarpus in the same pair. 



ef C^V.)- 

 » 37. The fifth pair ot perseopoda. ef ('"/i)- 

 » 38. A piece of the front margin of the carpus in 



same pair. ef (^"/i)- 

 » 39. The dactylus in the same pair. ef (''Vi)- 

 » 40. The seventh pair of perseopoda. ef ('Vi)- 

 » 41. A piece of the front margin of the carpus in 



the same pair. ef (*Vi)- 

 » 42. A piece of the front margin of the metacarpus 



in the same pair. ef (*^/i)- 

 » 43. The urus. ef ('7,). 



EUTHEMISTO GAUDICHAUDII. 



44. The second pair of perseopoda. ef ('Vi)- 



45. The third » « » ef ('"/i)- 



46. The fifth » » » ci^ ev,). 



THEMISTELLA STEENSTRUPI. 



47. The male from the side ('^/j). 



48. The first pair of antennae. ef (^^/]). 



49 and 50. The second and third flagellar joints 

 in the same pair. ci^ ("^"/i)- 



51. The second pair of antennae. ef (^Vi)- 



52. The apex of the same pair. ef ("%)• 



53. The first pair of perseopoda. ef ('""A)- 



54. The second « » » ef ('"%)• 



55. The third » » » ef (^VO- 



56. The fourth » » » ef (^VJ- 



57. The fifth » » » ef (*Vi)- 



58. The sixth « » » ef (^Vi)- 



59. The seventh » » » ef (^Vi)- 



60. Coupling spines from the first pair of pleopoda. 



ef (™7,)- 



61. The cieft bristle from the same pair. ef (^"Vi)- 



62. The urus. ef CVi)- 



