EXPLANATION OF THE PLATES. 



PLATE IV. 



HYMENOPTERA. 



Fig. 1. Sirex Gigas. 



2. Evania appendigaster magnified. 



3. Nomada Marshamella. 



DIPTERA. 



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 forficata. 



