146 
EXPLANATION OF PLATES. 
PLATE I. 
Fig. 1. 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 diam- 
eters; its work in seed corn. 
Fig. 4. Aphodius granarius, imago; enlarged six and one half diameters. 
Fig. 5. Clivina impressifrons, imago; enlarged eight and one half diam- 
eters. 
Fig. 6. The Seed-corn Maggot, Phorbia fusciceps, larva, enlarged eleven 
diameters. 
Fig. 7. Puparium of same, enlarged ten and one half diameters. 
PLATE III. 
Fig. 1. The Seed-corn Maggot, Phorbia fusciceps, 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, teniata, imago; enlarged 
ten diameters. 
PLATE IV. 
Fig. 1. The Pale-striped Flea-beetle, Systena twniata, larva; enlarged 
hineteen diameters. - 
Fig. 2. Side view of same. 
Fig. 3. The Banded Ips, Jps fasciatus, larva; enlarged eight and one 
third diameters. 
Fig. 4. Pupa of same; enlarged nine diameters. 
Fig. 5. Imago of same; enlarged eight diameters. 
Fig. 6. Cardiophorus sp., larva, dorsal view; enlarged four diameters. 
PLATE V. 
Fig. 1. Drasterius elegans, imago; enlarged seven and one half diam- 
eters. 
Fig. 2. Larva of same; enlarged seven diameters. 
Fig. 3. Caudal segment of larva, more enlarged. 
Fig. 4. The Wheat Wireworm, Agriotes mancus, imago; enlarged seven 
diameters. 
