39' 



The Ohio Naturalist. 



[Vol. IX, No. 1, 



fortunate possessor to find new worlds to people. In either 

 case, once they have been employed to flee from birthplace to 

 other haunts their mission is accomplished and instead of being 

 a help they become a hindrance to the perpetuation of the 

 species and are better dispensed with, which is done in the 

 manner related. It is quite possible that the apocopated 

 hemelytra in Trepobatopsis and Tehuatometra have a like cause. 

 It may not be out of place to point out that as the figures 

 show, the corial venation in two of the genera, viz., Trepobates 

 and Rheumatobates is preserved intact, whence we mav deduce 

 that such is the condition also in Trepobatopsis and Tehna- 

 tometra. Further, the veins of the membrane in the first two are 

 simple longitudinal ones, and I venture to hazard the opinion 

 that this is their character in the second two. The affinities 

 that this corial venation shows are matters that I am only too 

 happy to leave to others, who are learned in phvlogeny. 



P^ig. 1. Hemelytra of Rheumatobates tenit-ipes Meinert, 9 . showing 

 the indented suture, a-b, between the Corium and ^'cmlirane, along which 

 the membrane is broken off, "*; ;-5.5. 



Fig. 2. The same in Trepobates pietits, Herrich-Schaeffer. X 35. 



F'ig. 3. Sketch of Truncate Hemelytra of Telmatometra whitei, 

 Bergroth. From one of the types. Shows corial venation. X 3J. 



Fig. 4. Sketch of Truncate Hemelytra of Trepobatopsis dcnticornis, 

 Champion (^ . Shows corial venation. X 5. 



