214 Journal New York Entomological Society. [^'°1- xxv. 



also more hairy beneath. The front of the head is shaped about as in O. 

 striatipes from Utah, except that it is even more produced. The basal cell 

 in the fore wing is about as long but narrower than in that species, and the 

 eyes are less prominent. The uncus when viewed in profile is hooked at 

 the extremity as shown in the illustration. 



^$3-^ 



Okftnaaano. JDdtlidula 



Measurements (in Millimeters). 



Male Type 



Length of body 19 



Width of head across eyes 6 



Expanse of fore wings 52 



Greatest width of fore wing 8 



Greatest width of operculum 3 



Length of valve 3 



In addition to the type the following specimens have been ex- 

 amined, all males and collected at Athlone, Merced County, Cali- 

 fornia, in 1917 by Alonzo C. Davis, who says that they "make a 

 zeeee" noise: July 18, one; July 19, one; July 22, two; July 23, three, 

 one greenish individual "singing with his head out of a hole" in the 

 ground; August 12, two. 



At first sight the individuals of this species appear to be imma- 

 ture, but as they were captured while singing that supposition is dis- 

 posed of, and further structural characters separate pallidula from its 

 most closely related congeners. While Okanagana merccdita Davis, 

 and the nearly related Okanagana uncinata Van D., have the front 

 of about the same shape and the uncus hooked, they are much smaller 

 and the venation is also quite different. In those species the radial 

 cell has the front and hind margin more parallel, and the median 

 cell is differently shaped, as may be seen by comparing the figures of 



