ODONATA OF BAJA CALIFORNIA. 509 



S Anal triangle 3-celled; 10 with a small, median, ba- 

 sal, dorsal tooth and a smaller one on each side. 



Abdomen 5 47-51, ? 49. Hind wing 6 43-47, ? 45-47. 



Distributio'ii. Mexico (Cordova, Baja California as 

 above), California (Los Angeles, by Dr. A. Davidson), 

 Texas, Dakota (Beadle Co., July, 1888, by Mr. E. S. 

 Cheney), Colorado (Denver, by Mr. E. V. Beales), 

 Yellowstone, British Columbia (Victoria). 



18. y^scHNA coNSTRiCTA Say. PL XV, figs. 29, 30. 



M. c. Say, Jour. etc. Phila. viii, p. 11, 1839. Complete biblio- 

 graphy, by Hageu, Proc. Bost. See. N. H. xviii, p. 34, 1875. 

 Calvert, Trans. Am. Ent. Soc. xx, p. 249, 1893. 

 17 c5 La Chuparosa, October, 1893, G. Eiseu. 



All the pale markings of the body blue, spots at the 

 apices of the abdominal segments quite large, a black 

 line on the fronto-nasal suture, antehumeral stripes dis- 

 tinct, front wings with 19-23 antecubitals, the acute, in- 

 ferior, anteapical spine of the superior appendages of the 

 male shorter than in specimens from the eastern United 

 States. 



Abdomen 51.5-58. Hind wing 45-50. 



Distribution. Baja California (as above) to British 

 Columbia; Colorado to Maryland and Labrador; Kam- 

 tschatka, Siberia. 



Anax Leach. 



Leach, Ediub. Eucyc. ix, p. 137, 181.^; Amer. edit. (Phila.) viii, jit. 

 2, p. 726, 1816. Karsch, Eut. Nach. xvii, p. 287, 1891. Cal- 

 vert, Trans. Am. Eut. Soc. xx, p. 222, 1893. 



(The two following species may easily be separated by 

 size, the ^ superior appendages, etc.) 



19. Anax junius Drury. PL xv, figs. 15, 16. 



Lihellida j. Drury, 111. Exot. Ins. i, p. 112, pi. 47, fig. 5, 1770. 

 Complete bibliography in Hageu, Psyche, v, p. 305, 1890. Cal- 

 vert, Trans. Am. Eut. Soc. xx, p. 249, 1893. 



