INDEX. 



The figures in dark type indicate the page where the Genus or Species is fully described. 



Abdomen of the female of Halobates, 32. 



,, ,, Halobatodes, 61. 



,, male of Halohates, 31. 



„ „ Halobatodes, 60. 



Abnormal antennae in Halohates germamcs, 51. 

 Acetabulum of Halobates, anterior, 29. 



„ Halobatodes, anterior, 61. 



Amyot, C. J. B., 9. 



Anatomy and description of genera and species, 23. 

 Ancestry of Halohates, 75, 78. 



„ Halobatodes, 78. 



Antennas of Halobates, 25. 



„ Halobatodes, 59. 



Berendt, G. C., 14. 

 Bibliography, 1. 

 Elanchard, E., 8. 

 Brachymetra, 10. 

 Burmeister, H., 5. 

 Colliugwood, Cuthbert, 42. 

 Description of the species of Halobates, 39. 



„ „ ' Halobatodes, 63. 



Distribution geographical, 77. 

 Distribution of Halohates, causes of, 78. 

 Diving powers of Halobates, 74. 

 Dohrn, A., 15. 

 Y.s,g oi Halobates, 13, 71. 

 Eschscholtz, J. Friedrich, 2. 

 Excluded species, 79. 

 Eyes of Halohates, 25. 

 Eairmaire, L., 12. 

 Food of Halobates, probable, 73. 

 Fossil Halobates, supposed, 14. 

 Frauenfeld, G. von, 16. 

 Fringe on middle tarsus, possible use of, 74. 

 Genera, key to, 23. 

 Genital segments of the female of Halobates, 34, 72. 



„ ,, ,, Halobatodes, 61. 



,, „ male of Halohates, 32, 72. 



„ ,, ,, Halobatodes, 61. 



Geographical Distribution, 77. 

 GigHoli, E. H., 19. 



(ZOOL. CHALL. EXP. — PART XIX. — 1883.) 



Habits, life history and, 71. 



Habits of Halohcdes, 73. 



Hairs on front tibia in Halobates, peculiar patch, 35. 



Halobates, 2, 4, 5, 8, 9, 11, 23, 71, 73, 77. 



Halobate,% characters of the genus, 23. 



„ details of structure of, 24. 

 Halobates albhierims, A. and S., 10, 79. 



albinervis, 16, 



cyanijye^, 18. 



fiaviventyis, Esch., 5, 6, 12, 13, 18, 55, 71, 

 77 (PL II. fig. 2). 



flavivenins, Frauenf., 4, 16, 18, 57. 



fraumfeldanus, 57, 77 (PL II. fig. 3). 



germanusy 60, 77 (PL L fig. 6). 



hayanm, B. W., 28, 52, 77 (PL I. fig. 8 ; 

 PL III. fig. 29). 



lituratus, Stal, 13, 14, 15, 16, 23, 64. 



micans, Esch., 3, 5, 8, 12, 16, 17, 43, 77 

 (PL L fig. 2). 



oi'ientalis, Dist., 79. 



pktus, Germ., 12, 15, 23, 79. 



platensis. Berg., 79. 



jjrinceps, 44, 77 (PL I. fig. 3). 



proavus, 54, 77 (PL IL fig. 1). 



sericeus, Esch., 3, 6, 9, 10, 11, 13, 25, 



27, 28, 30, 34, 35, 36, 37, 38, 47, 71, 

 77 (PL I. fig. 7 ; PL III. figs. 1, 4, 5, 5a, 

 6, 6a, 7, 10, 11, 12, 16, 17, 20, 24, 

 26). 



eobrinus, 46, 77 (PL I. fig. 5). 



stall, Dohrn, 15, 69. 



streatfieldana, Tempi., 6, 45. 



etreatfieldanns, Tempi., 45, 77 (PL I. 

 fig. 4). 



tnillei-storffi, Frauenf., 16, 17, 25, 27, 30, 

 34, 35, 36, 37, 38, 40, 71, 77 

 (PL I. fig. 1 ; PL III. figs. 2, 3, 8, 9, 

 13, 14, 16, 18, 19, 21, 22, 23, 25, 27, 



28, 30). 

 Halobates widlersiorffi, egg of, 71. 

 Halobatodes, 23, 58, 72, 75. 



T 11 



