290 
The Ohio Naturalist. 
[Vol. V, No. 4, 
My sincere thanks are due to Mrs. Slosson for her kindness 
in granting me the privilege of studying her insect. 
The revival of this genus raises the genera of North American 
Gelastocoridae (sens, lat.) to four, namely; 
Pelogonus Latreille, 
Gelastocoris Kirkaldy. =G^a/gH/i<5 Latreille, 
Mononyx Laporte, 
Xcrthra Say. 
The number of species has heretofore been given for the 
United States as three only, Pelogonus americanus Uhl., Gelas- 
tocoris (Galgulus) oculatus Fabricius, and Mononyx (Nerthra) 
stygica Say. As a matter of fact, however, their number cannot 
be fixed with certainty. The recorded species and those known 
to me are as follows, from the whole of North America. 
Family gelastocorid.® Kirkaldy. 
Subfamily Pelogonincc. 
Genus Pelogonus Latreille. 
P. americanus Uhler, Eastern LL S. 
P. perbosci Guerin-Mexico, W. Indies. 
P. cenifrons Champion-Mexico. 
P. viridifrons Champion-Guatemala. 
P. aciitangiihis Champion-Guatemala. 
Subfamily Gelastocorince. 
Genus Gelastocoris Kirkaldy. 
G. rotundatus Montandon-Mexico, Guatemala. 
G. hufo Herrich-Schaeffer-Mexico, Guatemala, Costa Rica. 
G. oculatus Fabricius-U. S., Canada, Mexico, Central and South 
America. 
G. vicinus Montandon^U. S.. Mexico. 
G. variegatus Guerin-S. and tV. S., Mexico, C. and S. A. 
Subfamily Mononychincc. 
Genus Mononyx Laporte. 
M. fuscipes Guerin-tV. U. S., Mexico, C. and S. A. 
fl/. nepceformis Fabricius. W. U. S. and IMexico. 
M. sp. n. sp. Florida. 
Genus Nerthra Say. 
A', stygica Say, S. E. U. S. 
This gives in all three subfamilies and fourteen species for 
North America. 
The preceding list of species is partly taken from Biologia 
Centrali Americana, partly from Montandon’s revision before 
cited and some localities are from my collection. Guatemala 
bugs have been included because it is not at all improbable that 
they may cross the southern border of Mexico and even be found 
in the Southwestern United States. The Mononyx n. sp. men- 
tioned is an apparently undescribed bug from Florida, in the 
collection of Mr. Otto Heidemann, of Washington, D. C. 
