﻿OF THE STATE ENTOMOLOGIST. 



127 



«ients of spretus, and conclusively show by comparing tlie figures in tlie fourth col- 

 «mn that the specific distinction cannot, as Mr. Walsh thought, be safely and solely 

 Jeft to length of wing beyond the abdomen ; as specimens of either species may 

 -Jipproach each other in this respect to within the hundredth of an inch, and might be 

 found to entirely agree if larger suites were compared. Nevertheless this relative 

 length of wing has great value as a specific character, since of all the specimens meas- 

 ured, in even the longest winged femur-ruhrum the wings fall short one hundredth of 

 an inch of extending as far beyond the abdomen as they do in the shortest winged 

 spretus. The anal characters of the male, (Fig. 29) will be found pretty constant and 

 reliable. Yet they also vary and frequently approach spretus in the narrowing notched 

 form of the tip. In the female the anal characters are of less value in distinguishing 

 ■the species. 



CALOPTKNU3 FEMUB-RUBRUM. 



Measurements of the Male ; in Hundredths of an Inch. 



