1908. 



NATURAL SCIENCES OF PHILADELPHIA. 



401 



Proportions of caudal femur and ovipositor in forty-five Yuma females. 

 Ovipositor. 



While the head is blackish in all the specimens, the pronotum is 

 frequently quite reddish, in some individuals entirely so, which latter 

 type is connected with that having the pronotum solid blackish by a 

 considerable number of intermediates. 



It was astonishing to note the numbers in which this species came to 

 the arc lights, hundreds of them running about on the ground beneath 

 the lights or flying swiftly around in circles. 



MIOGRYLLUS Saussure. 

 Miogryllus pictus Scudder. 



At Yuma on the evenings of July 27 and 28 this species frequented the 

 vicinity of the electric lights in considerable numbers. A series of 



