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.=(7a/gn/H5 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 Monon^'x (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 Pclogonince. 



Genus Pelogonus Latreille. 



P. americanus LThler, Eastern U. S. 

 P. pcrbosci Guerin-Mexico, W. Indies. 

 P. crnifrons Champion-Mexico. 

 P. viridijrons Champion-Guatemala. 

 P. acutangulus Champion-Guatemala. 



Subfamily GelastocorincF. 



Genus Gelastocoris Kirkaldy. 

 G. rotundatns Montandon-Mexico, Guatemala. 

 G. bufo Herrich-Schteffer-Mexico, Guatemala, Costa Rica. 

 G.' oculatus FalMncius-U. S., Canada, Mexico, Central and South 



America. 

 G. vicinus Montandon-U. S., Mexico. 

 G. variegatus Guerin-S. and W. U. S., Mexico, C. and S. A. 



Subfamily M ononychince . 



Genus Mononyx Laporte. 



M. fuscipes Guerin-W. U. S., Mexico, C. and S. A. 

 M. ncpccjormis Fabricius. W. U. S. and Mexico. 

 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 improliable 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 Hcidcmann, of Washington, D. C. 



