368 The University Science Bulletin. 



PLATE XXXVIII. 



Fig. 1. Dorsal view of the region into which the Malpighian tubules empty. 

 bl, bladder; dd, Dorsal duct; ve, ventriculus; si, small intestine. 



Fig. 2. Ventral view of the same region, bl, bladder; cd, common bladder 

 duct; vd, ventral duct; dd, dorsal duct; n, nodule on the Malpighian tubule; 

 si, small intestine. 



Figs. 3, 4. Lateral view, showing the left and right sides of the intestine 

 with the bladders and ducts, ve, ventriculus; si, small intestine; bl, bladder; 

 o, duct opening into the small intestine. 



Fig. 5. Dorsal view of the ventriculus, showing the arrangement of the 

 Malpighian tubules. 2nd, second abdominal segment; 9th, ninth abdominal 

 segment; xx, region in which the free ends of the Malpighian tubules and 

 the adipose tissue interweave into a dense mass. 



Fig. 6. Ventral view of the ventriculus, showing the arrangement of the 

 Malpighian tubules. Labels as in figure 5. 



Fig. 7. Malpighian tubules under the microscojie, showing the nodules. 

 This piece of the tube occurred just posterior to where a dorsal tube turns 

 caudad. t, tubule; n, nodule. 



Fig. S. Section from the Malpighian tubule toward the distad end, just 

 anterior to the highly convoluted area. The nodules are quite numerous here 

 and the tube thickened, t, tube n, nodule. 



Fig. 9. Highly magnified portion of the tubule, showing the disappearance 

 of the tracl{ae on the nodules, n, nodule; t, tube; tr. trachea'. 



Fig. 10. Cross section of tubule. 



Fig. n. Cross section of tubule and nodules. 



Fig. 12. Longitudinal section of tubule and nodule. 



