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EXPLANATION OF PLATES. 
PLATE I. 
Fig. L Myrmica scabrinodis lobicornis , female; enlarged ten diameters. 
Fig. 2. Male of same species; enlarged nine and one fourth diameters. 
PLATE II. 
Fig. 1. Myrmica scabrinodis lobicornis, worker; enlarged eight and one half 
diameters. 
Fig. 2. Solenopsis debilis, worker; enlarged eighteen diameters. 
Fig. 3. Agonoderus pallipes, imago; enlarged four and one fourth diameters; 
its work in seed corn. 
Fig. 4. Aphodius granarius , imago; enlarged six and one half diameters. 
Fig. 5. Clivma impressifrons , imago; enlarged eight and one half diameters. 
Fig. 6. The Seed-corn Maggot, Anthomyia zece, larva, enlarged eleven 
diameters. 
Fig. 7. Puparium of same, enlarged ten and one half diameters. 
PLATE III. 
Fig. 1. The Seed-corn Maggot, Anthomyia zece, imago; enlarged eight and 
two thirds diameters. 
Fig. 2. Seed-corn injured by larva of the same. 
Fig. 3. The Black-headed Grass Maggot, Sciara sp., enlarged five diam¬ 
eters. 
Fig 4. Labrum of same, upper surface. 
Fig. 5. Labrum, lower surface. 
Fig. 6. Mandible. 
Fig. 7. Maxilla. 
Fig. 8. The Pale-striped Flea-beetle, Systena tceniata, imago; enlarged ten 
diameters. 
PLATE IV. 
Fig. 1. The Pale-striped Flea-beetle, Systena tceniata, larva; enlarged 
nineteen diameters. 
Fig. 2. Side view of same. 
Fig. 3. The Banded Ips, Ips fasciatus, larva; enlarged eight and one third 
diameters. 
