Explanation of Plate XLIX. 



Fig. 40. Felobius tardus, lateral view. 



41. Orthopterus smithi, lateral view (reversed). 



42. Gyrinua natator, dorsal view. 



43. Orectoc.hilus dispar, ventral view. 



43a. „ „ , lateral view of median lobe. 



44. Hydrophilus piceus, dorsal view. 



45. Laccohius yteriensis, dorsal view, 



46. Cyclonotimi subde2)rcssum, dorso-lateral view. 



46a. „ „ , median lobe (ventral face up). 



47. Berosns nignaticoUis, lateral view. 



48. Silpha atrata, lateral view, with sac evaginated. 



Descriptions on pp. 491-495 and (Slljiha atrata) p. 503. Explana- 

 tion of the letters used unifurnily on pi>. 481-483. 



