Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
THE 
Fig. 
Fig. 
Fig. 
Fig. 
DIS HR wp 
184 
EXPLANATION OF PLATES. 
Puate I. 
THE WHEAT BULB WORM. 
(Original.) 
Meromyza americana, imago, or adult fly; magnified twelve 
diameters. 
Head of same; more highly magnified. 
Larva; magnified sixteen diameters. 
Head of the above; more highly magnified. 
Ege; magnified sixty diameters. 
Pupa enclosed in puparium; magnified thirty diameters. 
The same, removed from puparium; ventral view. 
The same; dorsal view. 
Puate II. 
WHEAT STRAW-WORM, AND THE PARASITE OF MEROMYZA AMERICANA, 
bo 
Celinius meromyze: parasitic on the Wheat Bulb Worm; 
imago. (Original.) 
The pupa removed from the pupa case. (Original.) 
The Wheat Straw Worm, Jsosoma tritici: a, larva, ventral 
view; b, do., lateral view; c, antenna; d, mandibles; e, 
anal end, ventrally; f, imago; g, h, front and hind wings 
of exceptional individuals; 2, aborted wing in the normal 
flies—all relatively enlarged. (After Riley.) 
Pupa, magnified. (Original.) 
