1919.] NATURAL SCIENCES OF PHILADELPHIA. 67 



different. There is very considerable variation in the relative 

 width of the pronotum, particularly in the female, the greatest 

 width varying very decidedly in proportion to the length. This 

 variation, in its most decided phase, has no geographic correlation, 

 the Marathon series alone showing both the markedly different 

 forms figured. In both sexes there is a weak but apparent tumidity 

 of the pronotum caudad in the majority of the specimens, but 

 more pronounced in the male. This is occasionally almost absent 

 and there is no geographic correlation in this variation in width, 

 nor is there any apparent correlation with the proportion of width 

 to length. 



Synonymy. — We have before us the unique male type of Papagoa 

 arizonensis Bruner. As mentioned by Bruner, the specimen has 

 been dried from alcohol and is greatly shrivelled. The form of 

 the fastigium has been greatly altered, being unnaturally acute 

 and the dorsal surface of the same part is greatly distorted. The 

 specimen is unquestionably a male in-dividual of Mermiria texana, 

 of the general size of material of that sex from southern Arizona. 

 The genus Papagoa and the species arizonensis must be sunk in 

 synonymy under texana. Cockerell's mutation viricUs we have 

 not seen, but we must decry the use of technical names for such 

 phases, as the logical outcome would be the enforced establish- 

 ment of thousands of similar names in the Orthoptera, for well 

 known and easily recognized manifestations of elementary, prob- 

 ably physiological and clearly non-genetic, influences. 



Measurements (in millimeters) . 



Length of Length of Length of Length of 

 cf body. pronotum. tegmen. caudal femur. 



Sanderson, Texas 25.5 3.9 20.4 14.8 



Sanderson, Texas 26.5 4.2 22.5 16.6 



Marathon, Texas 29.2 4.5 22.7 16.5 



Marathon, Texas 31.5 5.1 25.6 17.5 



Persimmon Gap, Texas 24.9 4.1 19.4 13.5 



Persimmon Gap, Texas 29.5 4.6 24.2 17 



Lost Mine Peak, Texas 29 4.7 24.6 17 



Lost Mine Peak, Texas 30 5 25 IS 



Pine Mountain, Texas 25 4 20.3 14.6 



Pine Mountain, Te.xas 28.3 4.8 24.4 17.9 



El Paso, Texas, type 30.2 5 27 18.2 



Franklin Mountains, Texas 29.2 5 25.2 17 



Franklin Mountains, Texas 32.3 5.3 27.6 18.2 



Rock House Canyon, Arizona 26.8 4.4 24.4 16.5 



Mud Springs, Arizona 25.2 4.2 21 14.5 



Mud Springs, Arizona 25.2 4 21.7 14.7 



Prescott, Arizona 23 3.6 18.5 12.8 



Prescott, Arizona 25.2 4 22 15.5 



Mount Tritle, Arizona 23.8 4.1 19.4i« 13.8 



^^ Apex incomplete. 



