ODONATA OF BAJA CALIFORNIA. 507 



in^ a distinct, inferior, subbasal tooth, the pterostigma 

 shorter and yellow, the reticulation of the wings more 

 yellowish. Two other South American species described 

 by Rambur, bonariensis and Marchali, are personally un- 

 known to the writer; perhaps they are closely allied, but 

 Rambur' s descriptions seem to indicate specific differ- 

 ences from californica. In describing calif oi^nica as new, 

 reliance has chiefly been placed upon the facts that Dr. 

 Hagen considered the species as distinct, that the allied 

 species referred to above were known to him, and that 

 the present writer possesses one of Dr. Hagen's types 

 given by him in July, 1890. 



16. ^scHNA coRNiGERA Braucr. PI. XV, figs. 24, 31, 

 32. 



^2 . c. Brauer, Verb. zool. bot. Ges. Wien, xv, p. 906, 1S65; Reise 

 d. Novara, Neur. p. 70, pi. i, fig. 16, 1S66. Hagen, Verb. Zool. 

 Bot. Ges. Wien, xvii, p. 49, 1867; Proc. Bost. Soc. N. H. xviii, 

 p. 39, 1875. M.jucxinda Hagen, Syu. Neur. N. A. p. 314, 1861 

 (no description). 



1 ,^ 1 ? El Paraiso. 



1 San Eaymnudo, April, 1889, CD. Haines. 



1 Mesa Verde, October, 1893, G. Eiseu. 



Differs from Brauer's description in wanting the black 

 line on the fronto-nasal suture, by having a larger pteros- 

 tigma (2 mm. in Brauer's specimens), and the (blue) 

 thoracic stripes narrower. Hagen (I. c. 1867) mentions 

 that "die Flugelspitzen der Mannchen sind oft hyalin 

 ohne Briiunung"; such is the case in all four of these 

 specimens. 



Sternum of i with a spinous tubercle as in californica, 

 but more prominent. Superior appendages of the male 

 with the apex terminating in a short, acute process di- 

 rected downwards, the superior, median, longitudinal 

 carina relatively less elevated before the apex than in 

 californica, no inferior, subbasal projection. Tenth seg- 



