356 CALIFORNIA ACADEMY OF SCIENCES ' [Proc. 4th Ser. 



EXPLANATION OF PLATE XXII 



Chart of the gastrostege counts in specimens of Dromicus. Dots indi- 

 cate counts on specimens in the Academy and Stanford collections. Dots 

 above the line are males, those below, females. Crosses indicate records 

 from specimens not examined by me. 



/ 



