1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



423 



females is similar to the latter, and another from the same locality 

 closely approaches it. Two of the Las Vegas females are light brown- 

 ish much suffused on the head, pronotum and caudal limbs with hoary 

 white, the lateral bars very weak in two specimens. The single Cima 

 female is most peculiarly colored, being umber brownish with the 

 lateral bars marked, but the whole surface except the abdomen is 

 more or less clouded and washed with rather weak hoary white. 

 The males are quite uniform in color compared with the females, all 

 being in the green phase, the lateral bars prominent except in one 

 specimen. The color of the antennae is subject to a considerable 

 amount of variation, and often irrespective of phase, being brownish, 

 yellow or orange. 



The species has previously been recorded from Indio, California, 

 and erroneously as P. virgata from Yuma, Arizona; between Yuma 

 and Gila Bend, Arizona, Palm Springs, Cahon Pass and Lancaster, 

 California. 



Bobtettix punctatus (Scudder). 



As recently shown by Caudell, 5 Scudder's Gymnes punctatus is really 

 a species of Bootettix, related to, but quite distinct from, the type 

 species B. argentatus, which latter appears to be peculiar to the Chihua- 

 huan desert region east of the continental divide. The species of 

 the Western desert tract is invariably found on greasewood (Corillea 

 tridentata), as is also the case with B. argentatus. 



When specimens of B. punctatus are compared with representatives 

 of B. argentatus they show differences as follows : 



C? 



B. argentatus. 



Fastigium compara- 

 tively broad, not 

 strongly acute-angu- 

 late, hardly carinate. 



Face moderately re- 

 treating. 



Eye not more than half 

 again as long as the 

 infraocular sulcus. 



Blackish-brown macu- 

 lations on lateral 

 lobes of pronotum 

 and pleura marked. 



Tegmina with more 

 numerous macula- 

 tions. 



Caudal femora with 

 the dark bars usu 

 ally quite promi- 

 nent. 



Size larger. 



B. punctatus. 



Fastigium narrow, sub 

 lanceolate, distinct- 

 ly carinate. 



Face very consider- 

 ably retreating. 



Eye twice as long 

 as the infraocular 

 sulcus. 



Blackish-brown macu- 

 lations on lateral 

 lobes of pronotum 

 and pleura very weak. 



Tegmina with few or 

 no maculations. 



Caudal femora with 

 the dark bars weak- 

 er or even subobso- 

 lete. 



Size smaller. 



B. argentatus. 



Fastigium broad, sub- 

 rectangulate to very 

 slightly acute, hardly 

 carinate. 



Face moderately re- 

 treating. 



Eye but little longer 

 than the infraocu- 

 lar sulcus. 



As in the male. 



B. punctatus. 



As in the male. 

 As in the male. 



Size larger. 



Fastigium somewhat 

 produced, decidedly 

 acute-angulate, dis- 

 tinctly carinate. 



Face very consider- 

 ably retreating. 



Eye more than half 

 as long again as the 

 infraocular sulcus. 



As in the male. 



As in the male. 

 As in the male. 



Size smaller. 



Proc. U. S. Nat. Mus., XXXIV, p. 73. 



