292 , J. A. G. REHN 



(Manomera) which Is not found to the westward. However, I would 

 regard the basic developmental center for Diapheromera as Sonoran 

 on account of the specific diversity in the genus there. 



ORDER ORTHOPTERA: SUBORDER OOTHECARIA 



(Dictyoptera of some authors) 



Superfamily Mantodea 



The Mantodea are represented in western North America by 

 members of five subfamilies or families (the exact rank of the higher 

 entities is debatable). Two of these subfamilies are known only from 

 the New World, while the others are found in both hemispheres. 

 One of the latter is the Amelinae, which has two genera in North 

 America, both found only within its western part and in northern 

 Mexico. These are curious, almost entirely terrestrial mantids, one 

 of which, Yersiniops, has considerable saltatorial powers. The genus 

 Litaneutria occurs rather broadly over western North America 

 and northern Mexico, reaching northward to North Dakota, Mon- 

 tana, Washington, and extreme southern British Columbia. Yersini- 

 ops has a more limited distribution, extending from western Texas 

 westward to central southern Arizona and northward to parts of 

 Colorado. A related genus, Yersinia, occurs in northern Mexico. 

 All three genera clearly developed in a Sonoran faunal center. 



The widely distributed subfamily Manteinae is represented in our 

 territory by a single genus, Stagmomantis, which is clearly of 

 Neotropical origin. Species of this genus range southward to Ama- 

 zonia. The greatest diversity of Stagmomantis is in Central America, 

 where a number of lines of the genus not present elsewhere are de- 

 veloped. It later, probably, spread both to the north and to the 

 south. In western North America there are four species of Stag- 

 momantis. S. Carolina, a dominant eastern species, which is also 

 widely spread southward over Central America and northern South 

 America, reaches as far westward as the Great Plains in the pan- 

 handle of Texas, eastern New Mexico, and the Arkansas Valley of 

 eastern Colorado. 5. gracilipes, a very distinctive type, is known 

 only from several mountain areas in southern Arizona. 6". californica 

 occurs rather broadly in desert conditions from western Texas to 

 southern California, southern Nevada, Utah, and western Colorado. 

 S. limbata is broadly intrusive from Mexico, where it is widely 



