_Melanolestes abdominalis_, Herrich-Schäffer, 1848 540 _Phonergates bicoloripes_ 541 Family. _Aradidæ_ 541 _Dysodius lunatus_, Fabr. (Pito Bug) 541 The Ochindundu 541 Family. _Lygæidæ_ 541 _Lyctocoris campestris_, Fabricius 541 _Rhodinus prolixus_, Stål, 1859 541 Order. _Orthoptera_ 542 Locusts Injurious to Man 542 Order. _Coleoptera_ 542 _Silvanus surinamensis_, Linnæus (Saw-toothed Grain Beetle) 542 Order. _Diptera_ 543 _Aphaniptera_ or _Siphonaptera_ (Fleas) 543 Family. _Sarcopsyllidæ_ (Jiggers) 543 Genus. _Dermatophilus_, Guérin 544 _Dermatophilus cæcata_, Enderl. 544 _Dermatophilus penetrans_, L., 1758 (Jigger, Chigoe) 544 Genus. _Echidnophaga_, Olliff 544 _Echidnophaga gallinacea_, Westwood (Chigoe of Fowls) 544 Family. _Pulicidæ_ (True Fleas) 545 Genus. _Pulex_, Linn. 545 _Pulex irritans_, L., 1758 545 Genus. _Xenopsylla_, Glink 546 _Xenopsylla cheopis_, Rothschild 546 _Xenopsylla brasiliensis_, Baker 547 Genus. _Ctenocephalus_, Kolenati 547 Genus. _Hoplopsyllus_, Baker 547 _Hoplopsyllus anomalus_, Baker 547 Genus. _Ceratophyllus_, Centis 547 _Ceratophyllus fasciatus_, Bosc 547 Genus. _Ctenopsylla_, Kolenati 548 Genus. _Hystrichopsylla_, Taschenberg 548 _Pulex pallipes_ 548 SYSTEMATIC ANATOMICAL AND BIOLOGICAL REMARKS ON MOSQUITOES 548 CULICIDÆ OR MOSQUITOES 555 _The Classification of Culicidæ_ 561 _Notes on the Different Genera_ 566 Sub-family. _Anophelina_ 566 Genus.