302 Annals Entomological Society of America [Vol. XIII, 



EXPLANATION OF PLATE XXIX 



Hydroschendyla siibmarina (Grube). Male 



Fig. L Cephalic plate. 



Fig. 2. Distal portion of antenna in outline. 



Fig. 3. Tip of distal article of antenna more Mghly magnified. 



Fig. 4. Anterior border of prostemum with right prehensor. 



Fig. 5. Caudal end with anal legs, ventral view. 



Lithobiiis provocaior Pocock. 



Fig. 6. Anterior border of prostemum showing position of spine, with tooth 



interpolated in diastema of right half. 

 Fig. 7. The same, with tooth interpolated in diastema on both sides and an extra 



ectal tooth on left half. 

 Fig. 8. Basal joint of female gonopod showing form of basal spines. 



