Foster, George Arnold  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 bibliogr. references (p. [125]-128). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heleomyzidae--Classification<br/>Diptera--Classification<br/>Flies