66 PROCEEDINGS OF THE ACADEMY OF [March, 



The present species stands in a relatively isolated position in 

 the genus, and it has been suggested to the author that it should 

 be subgenerically differentiated from the genotype. We do not 

 feel warranted in taking such action at this time, as we lack suf- 

 ficient evidence to justify it. However, texana can be readily 

 distinguished from all the other forms of the genus by combining 

 with lateral pronotal carinse and supplementary carinse on the 

 lateral lobes of the pronotum, a relatively robust form, short 

 male subgenital plate, relatively short and robust caudal femora 

 and a strikingly contrasted and longitudinally barred color pat- 

 tern. The latter is mainly featured by a pronounced, broad, 

 medio-longitudinal dark bar, pale anal angles on the tegmina, a 

 second pale line in the distal half of the discoidal field of the teg- 

 mina and incomplete barring on the dorsal surface of the caudal 

 femora. 



Type.— d"; El Paso, Texas; [November, 1887]; (L. Bruner); 

 [Hebard Collection ex Bruner, Type no. 21]. Designated by 

 Rehn and Hebard, 1912. '^ 



Allotype. — 9 ; same data as type. 



Of the original series the type and the allotypic female are now 

 before us, a paratypic El Paso male, in the collection of the United 

 States National Museum, has been examined, and a paratypic 

 female from Lerdo, Durango, Mexico, in the Hebard Collection 

 ex Bruner, is also in hand. 



The species is sharply defined and so easily recognized by the 

 features given in the key, and by the figures, that no description 

 is necessary. The following comments cover the more note- 

 worthy features of variation. 



Morphological Notes. — The variation in fastigial form found in 

 most of the species of this genus is well examplified in texana. 

 In each of the series from Sanderson, Persimmon Gap, Pine Moun- 

 tain and Prescott we find males (figured) which show a range 

 from a moderately acute-angulate to a strongly acuminate outline. 

 In the females this variation is rarelj^ decided, yet occasionally 

 we find it distinctly marked, the three females from Canyon be- 

 hind Pulliam Bluff, Chisos Mountains, showing different types 

 with well-marked extremes, the two females from Lost Mine 

 Peak, Chisos Mountains, are very different in this respect, while 

 the extremes of the twenty-eight Marathon females are decidedly 



i^Proc. Acad. Nat. Sci. Phila., 1912. p. G2, (1912j. 



