ony seems now to be exhausted. The Mt. Wilson captures were all 

 smaller than the typical, ranging from' 17 to 20 mm. My wife and 

 I have recently found a colony of neurona in the Tehachapi Mountains, 

 at an elevation of over 6,000 feet from which a generous series was 

 secured. These latter captures are all larger than the Mt. Wilson 

 specimens, ranging from 20 mm. to 28 mm. in expanse. They are 

 otherwise typical, and show the usual wide range of variation charac- 

 teristic of the species. Dr. Skinner has stated that there are no 

 secondary sexual characters in neurona but we note one difference 

 that seems fairly constant throughout our series of 70 specimens. 

 In the males, an orange suffusion extends along the costal margin 

 of primaries (upper surface) which is widest at the base and tapers 

 toward apex. Only two females in our series show any suggestion 

 of this. 



The variation in neurona consists principally in the degree and 

 extent of the orange "veining." This ranges from clearly marked 

 individuals in which every nervule is distinctly lined with orange, to 

 specimens in which there is no orange whatsoever on the nerves 

 and which are practically indistinguishable from acmon females. 



The accompanying plate illustrates several of the points of dif- 

 ferentiation which we have here analyzed. In addition to showing 

 Plebeius emigdionis, neurona, chlorina and the new variety carolyna, 

 there is shown a cut of the male of Philotes speciosa. This rare 

 Lycaenid has been taken in isolated points of the Mojave Desert. 



Issued October 20, 1922. 



48 



