DERMAPTERA AND ORTHOPTERA 261 



Inyo Range, and in the Charleston Mountains of southern Nevada 

 as high as 11,500 feet. Both genera are chiefly thamnicolous; Morsea 

 occurs largely on chamise (Adenostoma) and manzanita {Ardosta- 

 phylos). The genus Enmorsea is known only from a few areas in the 

 mountains of what Mearns sixty or so years ago called the "Central 

 Elevated Tract," in extreme southern Arizona, where it has been 

 found on the foliage of conifers. A^Iost certainly Eumorsea also occurs 

 to the southward in the Sierra Madre of Mexico, and the same is 

 doubtless true of Morsea and Psychomastax in at least some of the 

 mountains of Baja California, although neither has been so reported 

 to date. The nearest relatives of the members of the subfamily 

 Morseinae are probably those of the central and eastern Asian sub- 

 family Gomphomastacinae, of which the five or so known genera, 

 range altitudinally upwards to high areas in the Karakoram section 

 of the Himalayan uplift (to at least 14,500 feet), and in northern 

 Afghanistan (where exact elevations are largely unrecorded). 

 Whether the Morseinae and the Gomphomastacinae have had a 

 reasonably recent common ancestry remains to be determined but 

 this possibility is now under investigation. However, the Morseinae 

 clearly comprise a cohesive natural assemblage, occurring in a 

 relatively limited Nearctic region, which also shows numerous 

 similar parallels in the distribution of other elements of the 

 Orthoptera. 



A third subfamily of the Eumastacidae, the Teicophryinae, con- 

 sisting of two Mexican genera, is known from the Cape Region of 

 Baja California, but has not been taken north of that limited area, 

 although the same genus (Teicophrys) occurs in certain areas of 

 south-central and southern Mexico. The other genus, Cadomastax, 

 is known only from a section of western Mexico. The Teicophryinae 

 do not occur south of the Isthmus of Tehuantepec, where several 

 other subfamilies of the Eumastacidae of more austral Neotropical 

 relationship are present. Presumably the Teicophryinae have 

 developed in Mexico. 



Family A crididae. (1) Subfamily Romaleinae. The Romaleinae 

 is a well-marked subfamily of the Acrididae, or true grasshoppers, 

 with more than two score genera from South and Central America 

 and certain areas of the United States. Several Old World genera 

 have quite recently been referred to this assemblage, but I question 

 this association, which is now under careful study. Within this 



