64 GUIDE TO ORTHOPTERA 



b 2 . First joint of hind tarsi neither sulcate nor serrate ; pro- 

 notum produced posteriorly, concealing the metanotum. 



Cycloptilum Scudder. 



Myrmecophila is represented by several species and is widely 

 spread, probably occurring wherever there are ants' nests. 

 Cycloptilum is represented by one or two species along the 

 borders of the Gulf of Mexico ; and Mogosiplistus has just been 

 discovered under bark of trees at Biscayne Bay, Florida, by Mrs. 

 A. T. Slosson. 



GRYLLINAE. 



Only three of the nineteen acknowledged genera of this sub- 

 family occur in the United States, and these genera are all cos- 

 mopolitan, or at any rate widely distributed over the globe. 



Genera of Gryllinae. 



a J . Hind tibiae furnished with long, mobile, pilose spines ; first 

 joint of hind tarsi unarmed above or with one row of serrations. 



Nemobius Serville. 



a 2 . Hind tibiae armed with strong fixed spines ; first joint of 

 hind tarsi sulcate above, with two rows of serrations. 



b *. Fore tibiae provided with auditory foramina on both faces. 



Gryllus Linn6- 

 b 2 . Fore tibiae with no auditory foramen on inner face. 



Gryllodes Saussure. 



Nemobius and Gryllus occur everywhere, and have a consider- 

 able number of species, especially the former. Gryllodes occurs 

 only in the southern portions with two or three species at most. 

 Many of the species in these genera are dimorphic as regards the 

 length of the organs of flight. 



OECANTHINAE. 



This subfamily is represented in the United States by a single 

 genus, Oecanthus Serville, out of the twenty known, and this it 

 shares with the Old World and South America. We have half 

 a dozen or more species, spread over the whole country. 



