39 2 
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 
hemelvtra in Trepobatopsis and Telmatometra 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 Rheumatobcites is preserved intact, whence we may deduce 
that such is the condition also in Trepobatopsis and Telma¬ 
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 phylogeny. 
Fig. 1. Hemelytra of Rheumatobates temtipes Meinert, $ , showing 
the indented suture, a-b, between the Corium and Membrane, along which 
the membrane is broken off. X 35. 
Fig. 2. The same in Trepobates pictus, Herrich-Schaeffer. X 35. 
Fig. 3. Sketch of Truncate Hemelytra of Telmatometra whitei, 
Bergroth. From one of the types. Shows corial venation. X 3£. 
Fig. 4. Sketch of Truncate Hemelytra of Trepobatopsis denticornis, 
Champion d\ Shows corial venation. X 5. 
