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EXPLANATION OF PLATES. 
Plate I. 
THE WHEAT BULB WORM. 4 ! 
(Original.) 
Fig. 1. Meromyza americana, imago, or adult fly; magnified twelve 
diameters. 
Fig. 2. Head of same; more highly magnified. 
Fig. 8. Larva; magnified sixteen diameters. 
Fig. 4. Head of the above; more highly magnified. 
Fig. 5. Egg; magnified sixty diameters. 
Fig. 6. Pupa enclosed in puparium; magnified thirty diameters. 
Fig. 7. The same, removed from puparium; ventral view. 
Fig. 8. The same; dorsal view. 
Plate II. ! 
THE^WHEAT STRAW-WORM, AND THE PARASITE OF MEROMYZA AMERICANA. 
Fig. 1. Ccelinius meromyza: parasitic on the Wheat Bulb Worm; 
imago. (Original.) 
Fig. 2. The pupa removed from the pupa case. (Original.) 
Fig. 8 . The Wheat Straw Worm, Isosoma tritici: a , larva, ventral 
view; h, do., lateral view; c, antenna; d, mandibles; e, 
anal end, ventrally; /, imago; g, h, front and hind wings j 
of exceptional individuals; i, aborted wing in the norma ; 
flies—all relatively enlarged. (After Biley.) 
Fig. 4. Pupa, magnified. (Original.) 
