Hagen.] 80 [May 5. 



5. Diplax vicina, d", ?. 



Dlplax vicina Hag.! Syn., 175, 4 ; Proc. Bost. Soc. Nat. Hist., xv, 

 267, 16. — Walsh! Proc. Acad. Philad., 1862, 400. 



Hab. Brunswick, Maine; Massachusetts; New Jersey ; Pennsyl- 

 vania; Washington; Rock Island, Illinois; Ontario, Canada. 



6. Diplax albifrons, d", ?. 



Libellula albifrons Charp. ! Libell. Europ., 14, pi. 11, f. 3 (male). 



Libellula ambigua Ramb.! 106, 105; Selys! Revue Odon., 325 (fe- 

 male) . 



Diplax albifrons Hag.! Syn., 177, 7 ; Stett. Z., xxiv, 375, 79; Proc. 

 Bost. Soc. Nat. Hist., xv, 267, 18; ibid., xvi, 363, 43. 



Hab. Georgia; St. Louis, Mo.; perhaps Massachusetts; Dallas, 

 Waco, Texas. 



The locality Europe, given by Charpentier is erroneous, his type 

 is in my collection. In Syn., 176, 6, I erroneously quoted L. am- 

 bigua as D. rubicundula. 



7. Diplax pallipes, d\ 



Diplax pallipes Hag.! Hayden Rep., 1873, 589. 

 Hab. Foot Hills, Colorado; Dallas, Texas; but the specimens 

 from Texas were not carefully examined. 



8. Diplax decisa, d, ?. 



Diplax decisa Hag. ! Hayden Rep., 1873, 588. 

 Diplax assimilata Hag.! Hayden Rep., 1872, 728. 

 Hab. Foot Hills, Colorado; Colorado Mountains, Pacific slope; 

 August 15-September 6 ; Yellowstone; Dakota. 



9. Diplax atripes, d% ?. 



Diplax atripes Hag.! Hayden Rep., 1873, 588. 

 Hab. Yellowstone. 



10. Diplax semicincta, d, ?. 



Libellula semicincta Say ! Journ. Acad. Philad., vin, 27, 15. 



Diplax semicincta Hag.! Syn., 176, 5; Proc. Bost. Soc. Nat. Hist., 

 XV, 267, 19; Hayden Rep., 1873, 590. 



Hab. Maine ; Massachusetts ; White Mts., N. H. ; Pennsylvania ; 

 Maryland. 



I possess a pair in bad condition, from California, and a female 

 from Yellowstone, quoted in Report, 1873. Perhaps they belong 

 to a different species. 



11. Diplax madida, d\ ?. 

 Diplax madida Hag.! Syn., 174, 2. 



Hab. Upper Missouri River; Yellowstone ; Gulf of Georgia, Cal.; 

 Victoria, Vancouver's Island. 



