EXPLANATION OF THE PLATES. 



PLATE IV. 



Hymenoptera. 



Fig. 1. Sirex Gigas. 



2. Evania appendigaster magnified. 



3. Nomada Marshamella. 



DlPTERA. 



4. Pedicia rivosa. 



5. Sericomyia Lapponum. 



PLATE V. 

 Fig. 1. Oxypterum Kirbyanum Leach, magnified. 



Aphaniptera. 



2. Pulex irritans magnified. 



Aptera. 



3. Ricinus Pavonis magnified. 



4. Aranea marginata Donovan. 



5. Chelifer cancroides magnified. 



6. Scolopendra (Lithobius) forficata. 



