xxiv 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. L Oxypterum Kirbyanum Leach, magnified. 



Aphaniptera. 



2. Pulex irritans magnified. 



Apteua. 



3. Ricinus Pavonis magnified. 



4. Aranea marginata Donovan. 



5. Chelifer cancroides magnified. 



6. Scolopendra (Lithobius) forficata. 



