no OHIO BIOLOGICAL vSURVEY 



EXPLANATION OF PLATE V. 



Figures 61-70 AUograpta obliqiia (Say) 



Egg X 20, from the side. 



Dorsal view of egg x 20. 



The sculpturing of the egg-shell, highly magnified. 



Adult female x 7. 



Young larva just hatched, X50 ; a, antennae; b, internal esophageal frame- 

 work; c, the posterior respiratory tubes. 

 Fig. 66 Mature larva x 9; a, antennae ; b, position of anterior spiracles; c, posterior 



respiratory tubes. 

 Fig. 67 Antero-ventral view of head of larva much enlarged; a, antennae; b, upper 



jaw; c, outer pair of mouth-hooks; d, lateral mouth-hooklets; e, internal 



esophageal framework; f, lower jaw. 

 Fig. 68 End view of posterior respiratory appendage; a, one of the spiracles; b, the 



circular plate; c, the in lerspiracular spines. 

 Fig. 69 Dorsal view of pupariuni x 5; a, posterior respiratory appendage. 

 Fig. 70 Lateral view of puparium x 3; a, posterior respiratory appendage. 



Figures 71-78 Sphaerophoria cylindrua (Say) 



Fig. 71 Adult male from the side x 7. 



Fig. 72 Dorsal view of posterior respiratory appendage; a, spiracles; b, circular plate. 



Fig. 73 End view of posterior respiratory appendage; a, circular plate; b, one of the 



three pairs of spiracles. 

 Fig. 74 Anterior larval respiratory cornua with spiracles from the side, highly' 



magnified. 

 Fig. 75 End view of the same. 



Fig. 76 Mature larva from the side x 6; a, posterior respiratory appendage. 

 Fig. 77 Ventral view of head of larva much enlarged; a, antennae; b, upper jaw; c, 



lateral mouth-hooklets; d, the outer pair of mouth hooks; e, esophageal 



framework; f, lower jaw, 

 Fig. 78 Lateral view of puparium x 7; a, the posterior respiratory appendage; the 



dotted lines represent other shapes in which the pupal envelope ma}- indurate. 



