Of the great family of Longicorn beetles (_Cerambyx_, Linnæus), consisting of not less than 8000 already described species, there are in South Africa 262 genera, of which no less than 67 are peculiar, namely 5 of PRIONIDÆ, 25 of CERAMBYCIDÆ, and 37 of LAMIIDÆ. The most conspicuous of these genera are _Sternotomis_, _Zographus_, _Alphitopola_, _Tragocephalus_, _Phryneta_, _Ceroplesis_. The giant _Prionides_ are evidently very rare, but the remarkable genera may be mentioned, _Cacoscelis_, _Cantharoctenus_, and _Cantharoplatys_, Westw. (Thes. Ent.). Of this great group only 23 species were collected by Mr. Oates, including _Ceroplesis hottentotta_, _C. cruentata_, and two other species, _Phrissoma giganteum_, _Callichroma latipes_, _Hamaticherus sericeus_ and _denticornis_, and _Amphidesmus analis_, Olivier. Family CHRYSOMELIDÆ. The Phytophagous or plant-eating beetles (_Chrysomela_, Linn.), as may be inferred from their habits, are exceedingly numerous, both in species and individuals, in all parts of the world, more than 10,200 species having been described. Some few groups are especially African, such as _Pæcilomorpha_, Hope, belonging to the _Megalopides_, numerous species of _Sagra_, _Antipa_, _Melitonoma_, _Acolastus_, _Eurytus_, _Pausiris_, _Pallena_, _Cyno_, _Macrocoma_, etc. Only twenty-three species of these insects were taken by Mr. Oates, including _Sagra festiva_, Gerst., _Diamphidia femoralis_, Gerst., _Clythra tettensis_, and various species of _Eumolpus_, _Cassida_, _Hispa_, _Colaspis_, etc. The other orders of insects received but little attention, and but few are contained in Mr. Oates’s collection. Order ORTHOPTERA. In this order several large and beautiful species of locusts were taken, including _Acridium leprosum_ and _scabrosum_, and _Petasia cruentata_, _Pamphagus haploscelis_, and the curious wingless grasshopper, _Eugaster loricatus_ of Gerstaecker. Two or three different kinds of Crickets and four species of BLATTIDÆ were also taken. Order NEUROPTERA. In this order a large species of _Myrmeleon_, marked like _M. Libelluloides_, and the lovely _Palpares citrinus_, were collected. Order HYMENOPTERA. In this order two large species of sand wasps with steel blue wings were taken. Order HEMIPTERA. Of HEMIPTERA twelve species of CIMICIDÆ were taken. Order DIPTERA.