390 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



black, depending on age. Three females show all triangles and sub- 

 triangles free; and 8 antenodals in 4 liind wings, and 9 in 2. 



Vulvar lamina forklike, about one-seventh length of 9; abdominal 

 appendages as in illinoiensis. 



In its venational and accessory sexual characters, and the absence 

 of a tibial keel on the middle tibia in the male, this species stands the 

 most sharply defined of all North American Macromias. 



Material examined. — Fresno, California, June 11 and July 21, 1900, 

 2 females, E. A. Schwarz (U.S.N.IM.). Tucson, Arizona, 2 males 

 (M. C. Z.). Arizona, Cornell Univ. Lot 35, Morrison, female (M. C. Z.). 

 Total, 2 males, 3 females. 



VENATIONAL CHARACTERS OF NORTH AMERICAN SPECIES OF 

 MACROMIA (MALES). 



The tabulation below is based on the following material: 



M. tseniolata, 10 specimens; 1 Toledo, Ohio; 5 Fort Wayne, Indiana; 

 4 Bluffton, Indiana. 



M. wahashensis, 10 specimens; all Bluffton, Indiana. 



M. aUeghaniensis, 5 specimens; 3 Ohiopyle, Pennsylvania; 1 Dun- 

 brooke, Virginia; 1 Livingston, Kentucky. 



M. illinoiensis, 10 specimens; 2 De Grassi Point, Ontario; 1 Orono, 

 Maine; 1 Fayette County, Pennsylvania; 1 Sandusky, Ohio; 1 Fort 

 Wayne, Indiana; 1 Putnam County, Indiana; 1 Livingston, Ken- 

 tucky, 1 Milwaukee, Wisconsin; 1 Waterloo, Iowa. 



M. australensis, 7 specimens; 6 Wister, Oklahoma; 1 Dallas, Texas. 



M. australensis?, 3 specimens; 2 Maryland; 1 Alabama, 



M. georgina, 4 specimens; Raleigh, North C^arolina. 



M. pacijica, 10 specimens; 8 Bluffton, Indiana; 1 Waco, Texas; 1 

 Kappa, Illinois. 



M. annulata, 3 specimens; Pecos River. 



M. magnifica, 2 specimens; Tucson, Arizona. 



