132 



1 lexandcr Petrunkevitcli , 



difference. Total size 12.17 iTim. C('j)haIothorax 4.0 mm. long, 

 5.6 mm. wide at posterior edge. Trochanter of the third and fourth 



Fig. 85. 



Fig. So. 



Fig. 87. 



Figure 8$.—Opiliotarhus elongatus (Scudder), U. S. N. M. No. 37975, dorsal 

 surface. Figure 86. — Same, ventral surface. ¥i%nrQ Sj.—Opiliotarbus elon- 

 gatus, from the Pennsylvanic (Lower Allegheny), Braidwood, Illinois, 

 holotype, U. S X. M. No. 37970, dorsal surface. Figure 88.— Same, ventral 



1 



•urface. 



