I02 OHIO BIOLOGICAL SURVEY 



EXPLANATION OF PLATE I. 



Didca fasciata fuscipcs I^oew 



Fig. I Adult female X 6. 



Fig. 2 Larva about six times naUiral size; a, anterior spiracle; b, caudal spiracles. 



Fig. 3 Antero-ventral view of head and mouth-parts of larva, enlarged; a, upper 

 jaw with a small pair of booklets at the side; b, lower jaw; c and d, lateral 

 booklets; e, antennae; f, sense papillae. 



Fig. 4 Right anterior spiracle much magnified. 



Fig. 5 Posterior breathing organs enlarged; a, one of the radiating spiracles. 



Fig. 6 Dorsal view of puparium a little more than five times natural size; a, caudal 

 spiracles. 



Fig. 7 Puparium from the side showing arrangement of spines and line of cleav- 

 age for escape of adult. 



Fig. 8 Head of male in profile. 



