53 



crassicornis, Not. 27 

 crassus, Gyr. 45 

 crispatus, Hydrop. 32 

 cristatus, Hydrop. 32 

 Crowii, Ag. 20 

 crux, Hydr. 42 

 cupreolus, Ag. 23 

 cuspidatus, Hydrop 32 

 Cybister, 4 

 cyaneus, Ag. 21 

 cyanicollis, Or. 47 

 Cyclinus, 49 



DAHUBJCUS, Col. 15 

 Darwinii. Col. 16 



Hydr. 37 



Davisii, Hydrop. 35 

 decemnotatus, Ag. 22 

 decempunctatus, Ag. 22 

 decemstriatus, Cop. 26 

 decoratus, Hydrop. 32 

 decorus, Hyd. 12 

 definitus, Hyd. 12 

 Dehaanii, Cyb. 7 

 Dejeanii, Cyb. 4 

 Gyr. 43 



Gyr. 44 



Hyd. 11 

 delicatulus, Hydrop. 33 

 dentipennis, Din. 49 

 deplanatus, Hydr. 38 



Hydr. 39 

 depressus, Gyr. 43 



Hydrop. 34 

 Desjardinsii, Cyb. 6 

 Desmopachria, 31 

 detritus, Ac. 11 

 didymus, Ag. 22 

 dilatatus, Ag. 24 

 dimidiatus, Dyt. 9 



Or. 47 



Dineutes, 48 

 discicollis, Col. 17 

 discoidalis, Hyd. 14 

 discolor, Din. 49 

 discus, Or. 47 

 dispar, Dyt. 5 



Hydr. 37 

 dissimilis, Cyb. 5 



Dyt. 5 

 distigma, Col. 15 

 distinctus, Cop. 26 

 Gyr. 44 

 Hyd. 13 

 Hyph. 31 

 divisus, Col. 17 

 dolabratus, Col. 15 

 dorsalis, Gyr. 44 



Hydr. 37 

 ,, Gyret. 47 

 dorsiger, Hyd. 13 

 Doubledayii, Hydrop. 32 

 Suph. 28 



Dregei, Hyd. 12 

 dubius, Ag. 25 



Dyt. 8 



Dyt. 9 



Hydrop. 34 

 duodecimpunctatus, Cnem. 3 

 duodecimpustulatus, Hydrop. 34 

 duodecimstriatus, Cop. 26 

 Duponti, Ac. 11 

 Col. 17 



Cop. 25 



Hydr. 38 

 Dytiscidse, 4 

 Dytiscus, 7 



ELEGANS, Cop. 26 



Hydrop. 34 

 elevatus, Hal. 1 

 ellipticus, Gyr. 43 

 Troch. 4 

 elongatulus, Hydr. 40 

 elongatus, Ag. 24 



Col 18 



Col. 27 



Gyr. 44 



emarginatus, Col. 27 

 Din. 49 

 Empsoni, Gyret. 47 

 Enhydrus, 43 

 enneagrammus, Hydr. 37 

 Erichsonii, Eun. 10 

 erythrocephalus, Hydr. 38 

 erythropterus, Ag. 21 

 Escheri, Hydr. 42 

 Eunectes, 10 

 exclamationis, Hyd. 14 

 excisus, Din. 49 

 exiguus, Hydrop. 32 

 exoletus, Col. 17 



FABRICII, Hyd. 13 

 fallax, Cyb. 4 

 fasciatus, Ac, 10 

 Hal. 3 

 Hyd. 11 

 Hydr. 42 

 Laccoph. 29 

 femoralis, Ag. 20 

 fenestralis, Col. 19 

 fenestratus, Ilyb. 19 



Hydrop. 34 



ferrugineus, Col. 22 

 Hal. 2 

 Hal. 2 

 Hydr. 39 



Hydrop. 34, 40 



Hyph. 31 



festivus, Gyr. 46 

 Hyd. 11 



figuratus, Hydr. 37 

 fimbriolatus, Col. 26 

 Cyb. 5 

 flavicollis, Col. 16 



