1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



441 



d 1 



Length of body, . 

 Length of tegmen, 

 Length of caudal femur, 



Length of body, . 

 Length of tegmen, 

 Length of caudal femur, 



Length of body, . 

 Length of tegmen, 

 Length of caudal femur 



There is an appreciable amount of individual variation in each 

 lot, but apparently average specimens have been selected for measur- 

 ing. 



The caudal angle of the disk of the pronotum varies somewhat 

 in the degree of angulation, one extreme being subrectangulate, the 

 other distinctly obtuse, the apex more or less rounded. The median 

 carina of the pronotum is rather variable in elevation and inflation, 

 and in a single female from Ahwahnee, which has the pronotal crest 

 quite low, the prozonal portion is uniform and not arcuate. 



The general base color varies from dull blackish-brown to ochraceous- 

 buff , the maculations more or less prominent in all but a few individ- 

 uals which have them quite weak. The color variations, as far as 

 can be determined, are not correlated geographically, dark and pale 

 individuals being present from localities represented by a series of 

 any size. There is also some variation in the intensity, fenestration and 

 shape of the fuscous band of the wing and also a little in the width of 

 the same. 



This species is usually common where found and is very active and 



elusive, flying short distances and alighting precipitately. It occurred 



on dry grass hillsides at Mill Valley and in tarweed, stubble and 



meadow land on the west slope of the Sierras. At Miramar it was 



29 



