Foster, George A.  1954- <br/><br/>
A revision of the Nearctic species of the genus Trixoscelis Rondani (Diptera: Heleomyzidae: Trixoscelidinae) / 
George A. Foster and Wayne N. Mathis. 
 - Washington, D.C. :  Smithsonian Institution Scholarly Press,  2011. 
 - viii, 128 p. :  ill.(some col.), maps ;  28 cm. 
 - Smithsonian contributions to zoology ;  no. 637. .
 - Smithsonian contributions to zoology ;  no. 637. .
<br/><br/>Includes bibliographical references (p. [125]-128).. 
<br/><br/><label>ISBN: </label> Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heleomyzidae--Classification.<br/>Diptera--Classification.<br/>Flies.