114 ILUNOIS BIOLOGICAL MONOGRAPHS [234 



EXPLANATION OF PLATE 

 Paragordius varius 

 Fig. 155. — Section thru young parasite; X 500. 

 Fig. 156. — ^Section near middle of body of young parasite; X 500. 

 Fig. 157. — Section near middle of body of slightly older parasite; X 500. 

 Fig. 158. — Section thru middle of body of yoimg female; just before formation of adult cuti- 



cula; shows formation of mesenteries; X 400. 

 Fig. 159. — Section thru female at beginning of formation of adult cuticula; mesenteries 



formed; X 200. 

 Fig. 160. — ^Longitudinal section thru cuticula; shows areola and protoplasmic strand; X 400. 

 Fig. 161. — ^Ventral part of female during formation of adult cuticula; cross section; formation 



of areolae; X 500. 

 Fig. 162. — Slightly oblique section thru anterior end of young parasite; beginning of cephalic 



ganglion; X 500. 

 Fig. 163. — Cross section thru cloacal gland of female at the time the larval cuticula is shed; 



larval cuticula partly loose; X 150. 



