Papers on Aphididę ... 

 - Washington,  Govt. Print. Off.,  1915. 
 - v, 43 p. incl. illus., map, tables, diagr.  II pl.  23 cm. 
 - U.S. Dept. of Agriculture. Bureau of Entomology. Technical series,  no. 25 .
<br/><br/> Papers first published separately, 1912-1914. 
<br/><br/>Bibliography: p. 40. 
<br/><br/>I. Studies on a new species of Toxoptera ... By W.J. Phillips and J.J. Davis.--II. The yellow clover aphis. By J.J. Davis. 
<br/><br/><label>LCCN: </label>agr15001507  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aphids.
<br/><br/><label>LC Class. No.: </label>SB822  / .A31 no. 25