986 On Aquatic Carnivorous Coleoptera or Vijtiscida. 



Fig. 75. Anterior tai-sus seen laterally of Xoterus f (after ScLiodte, Dan. El. XVIII, i). 



Fig. 76. Under sui-t:ice of front tarsus $ of Laccophilus (after Scliiudte, Dan. El. XVIII., t). 



Fig. 77. Front tarsus $ of Agalnis (Dytiscus chalconotus), (after Schiodte, Dan. El. XIX, a*). 



Fig. 78. Upper surface of front tarsus of J'^retes $. 



Fig. 79. Under surface „ idem. 



Fig. 80. Kight front tibia and tarsus of Eretes $. 



Fig. 81. Intermediate leg of Cyliister $ (Dj-tiscus rojselii). 



Fig. 82. Hind or swimming leg of Hyckovatus. 



Fig. 83. „ „ Macroportts (lower face, the cilise are repi-esented abbreviated). 



Fi". 84. „ ,, Hydrocantlius atripennis (upper face). 



Fig. 85. „ „ Megadytes (lower face, Cybister giganteus $). 



Fig. 86. Hind tarsus (without ciliie), of Pelobius; a, sole; b, the short side. 



Fig. 87. ,, ., Scutopterus horni. 



Fig. 88. • ,, „ ' Hyderodes shuckhardi. 



Fig. 89. ,, ,, Laccophilus. 



Fig. 90. ,, ,, Sandracottus (S. huntei-i). 



Fif. 91. ,. „ Cybister (Dytiscus rccselii. Fab.) 



Fig. 92. Terminal joint of hind tarsus with claws of Homceodytes. 



Fig. 93. ,, „ „ Cybister (Dytiscus immarginatus). 



Fig. 94. „ „ Megadytes ^f. 



Fig. 95. Epipleura of Chostonectes. 



Fig. 96. Wing of DytLscus sidcatus (Acilius) ; a and h, costal and subcostal nervures ; c, median nervnre ; 



d, submedian nervure ; e, anal ncrvure ; /, carpal cell, or carpa ; g, jngraent fleck. 

 Fig. 97. Wing of Hydaticus flavo-lineatus. 

 Fig. 98. „ of Cybister, (Dytiscus roeselii, Fab). 

 Fig. 99. Dorsal and lateral aspect of cedeagus of Cybister confusus. 

 Fig. 100. Idem „ ,, of the closely allied Dytiscus limbatus (the lower portion is 



not sufficiently elongate in this figure). 

 Fig. 101. Idem of Cybister guerinii. 

 Fig. 102. Idem of Dytiscus trij)unctatus (Cybister) ; (the rendering of the dorsal aspect is not exact, but 



its outline is fairly coi-rect.) 

 Fig. 103. Doi-sal, lateral, and ventral aspects of cedeagus of Dytiscus roeselii. Fab. (Cybister). 

 Fig. 104. Dorsal and lateral aspects of cedeagus of Dytiscus latissimus (Dytiscus). 

 Fig. 105. Lateral aspect of ojdeagus of DytLscus sticticus (Eretes) on same scale as preceding figs. 



PLATES IX TO XVIII. 



These Plates represezit figures of one or more species of each genus of the Dytiscidie ; as the figures are 

 all numbered, and the numbers with the names are given at the foot of each plate, it is not necessary 

 to repeat the names here. 



