Hagen.] 78 [May 5, 



Hab. Rock Island, N. and S. Illinois; Kansas ; Pecos River, West 

 Texas, May, Jane; Dallas, Waco, Texas, October; Matamoras, 

 Mexico; Foot Hills, Colorado; Montana, San Jose, California, No- 

 vember. Also in Ajan, Asia, Sea of Ochotsk. 



4. Mesothemis illota, d, ?. 



Mesothemis illota Hag. ! Syn., 172, 4; Hayden's Rep., 1873, 587. 



Hab. San Diego, California, April; San Matteo, Mendocino, 

 Gulf of Georgia ; San Jose, March ; Victoria, Vancouver's Island, 

 July; Mexico; Yellowstone. Also in Ajan, Asia. 



Perhaps M. gilva from Columbia is the same species. 



5. Mesothemis longipennis, d, ?. 

 Libellula longipennis Burm.! Handb., n, 850, 12. 

 Libellula socia Rbr.! Neur., 96, 94. 



Libellula truncatula Rbr.? Neur., 95, 92. 



Mesothemis longipennis Hag.! Syn., 173, 7; Stett. Z., xxiv, 375, 

 78; Proc. Bost. Soc. Nat. Hist., xv, 266, 11 ; xvi, 366, 42; Hayden's 

 Rep., 1872, 728; 1873, 588.— Walsh! Proc. Acad. Philad., 1862, 400. 



Hab. Natick, Massachusetts, August; New York; Maryland; 

 Dalton, Savannah, Georgia, May 23; Kentucky, May; Louisiana; 

 Chicago, Rock Island, Illinois; Florida, March; Montana; Yellow- 

 stone; Pecos River, Western Texas; Dallas, Waco, Texas, July; 

 Matamoras, Mexico; California; Victoria, Vancouver's Island. 



Dr. Brauer forms for this species a new genus, Pachydiplax. 



Leucorhinia. 



1. Leucorhinia intacta, d, ?. 



Diplax intacta Hag.! Syn., 179, 10. — Walsh! Proc. Acad. Philad., 

 1862, 400. 



Hab. Massachusetts; Ohio; Rock Island, Chicago, Illinois; Wis- 

 consin ; Ontario, Canada. 



2. Leucorhinia hudsonica, d, ?. 

 Libellula hudsonica Selys ! Revue des Odonates, 53. 

 Diplax hudsonica Hag.! Syn., 180, 11. 



Hab. New Brunswick; Winnipeg Lake; Ft. Resolution, Great 

 Slave Lake, Hudson's Bay Territory; Saskatchewan. 



Diplax dubia Hag., Syn., 180, 12, from Europe was only described 

 for comparison, and by error of the printer numbered. 



3. Leucorhinia borealis, d", ?. (No description.) 

 Hab. Saskatchewan; Ft. Resolution, Hudson's Bay Territory. 



