J14 ILLINOIS 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 young 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; begirming 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. 



