Fic. 
EXPLANATION OF THE PLATE. 
1.—Longitudinal median section of "i femur-rubrum, female, to show 
the course and divisions of the digestive can mouth; Oe, cesophagus ; 
Cr! anterior, Cy? posterior part of crop; P, peat Dia, blind sack or 
diverticulum of the stomach; Ven, ventricle; M, ileum; cof, ‘colon; &, rectum ; 
n, anus 
. 2,—Optical section of Malpighian tube. 
. 3-—Section of the epithelium of the rectum of Ca/optenus spretus. 
4.—Transverse section of the hind part of the crop; s s, spines of the cuticula ; 
rid, ridges; Z, longitudinal; muc. C, circular muscular coat. 
. 5.—Epithelium of the ileal folds; A, middle of folds; B, furrow between 
folds; Z, longitudinal muscular band. 
. 6.—Epithelial cells of the gastro-ileal valve of Gidipoda sordida. 
. 7.—Surface view of the gastro-ileal valves; Ven, ventricle; Ad, circular mus- 
cular band underneath the folds; Z, ileum 
. oo section of a diverticulum. 7%, trachea; muc, circular mus- 
cular c 
G. 9.—Transverse section through the furrow; F, between two ileal folds; cz, 
Tra 
cuticula; + Be, epithelium; conn, connective tissue; mac. C, circular muscles ; 
5 fongitddinal muscular ban 
. 10.—Transverse section of the gastro-ileal folds of @dipoda sordida : muc, 
muscular band, Bd, of Fig. 7. 
