336 E. H STRICKLAND. 



EXPLANATION OF PLATE IV. 



FIG. 9. Median sagittal section of a larva parasitized with Mermis sp. to 

 show the somewhat displaced alimentary tract, and a, the coiled up worm; b, the 

 displaced spinning gland, a short longitudinal section of which has been cut; c, 

 the much reduced fat-body; d, one of the pharyngeal glands. 



FIG. 10. Median sagittal section of a larva parasitized with a sporozoon to 

 show a, the mass of spores, a few of which are shown enlarged; b, the spinning gland; 

 c, the much reduced fat body; d, one of the pharyngeal glands, and e, the some- 

 what distorted wall of the alimentary tract. 



