REHN AND HEBARD 159 



in the genus, the accompanying purphsh occasionally absent, the 

 whitish occasionally subobsolete mesad; caudal margin of the 

 lateral lobes with the usual whitish edging broad, rarely very 

 slightly indicated and occasionally suffused with light buff. Teg- 

 mina of male with the area of the stridulating field between the 

 speculum and stridulating and anal veins varying from cinnamon- 

 brown to mummy brown, the vicinity of the anal vein hay's russet 

 to hazel; tegmina of female with the proximal section of the vicinity 

 of the anal vein more or less suffused with purplish, the interstitial 

 areas of the tegmina in the vicinity of the sutural margin washed 

 with brownish. Abdomen with the lateral lines of the base color, 

 usually emphasized by an increase in number of the adjacent pur- 

 plish punctulations (in but a single specimen, and that nymphal, is 

 the purplish dense enough to form a solid line) , the whole dorsum 

 of the abdomen thickly and the lateral aspects of the same more 

 sparsely punctulate with purplish, rarely with the distal section 

 of the dorsal segments thickly overlaid with hoary white; ventral 

 surface of the abdomen with a broad medio-longitudinal bar of 

 lemon yellow to light cadmium; ovipositor of the general color, the 

 teeth and lamellations raw umber tipped with black. Limbs more 

 or less washed with purplish as in other species of the genus, this 

 suffusion usually limited to the femora and often accompanied 

 more or less with hoary white, rarely the latter completely masks 

 the underlying purplish. 



Distribution. — The present species ranges from as far north as 

 the vicinity of the Organ Mountains, Donna Ana County, New 

 Mexico (Mesilla Valley), south to the Chisos Mountains in the 

 southern portion of the bend of the Rio Grande, western Texas. 

 The most eastern locality from which it is known is Garden Spring, 

 fourteen miles south of Marathon, Texas, while the northern lo- 

 cality is the most westerly known for the species. The vertical 

 range is from about 4000 feet (Franklin Mountains) to 7500 feet 

 (Livermore Peak). 



Biological Notes. — This form was generally found in more or less 

 abundant grasses as well as among scattered plants and oak shoots 

 under oaks in a canyon bottom (Maguire's Ranch), while nowhere 

 was the species abundant. At Garden Spring it occurred in scattered 

 grasses and low plants on a hill slope of broken pebbty rock. In 

 this latter situation the insect was climbing and jumping clumsily 



TRANS. AM. ENT. SOC, XL. 



