550 CALIFORNIA ACADEMY OF SCIENCES. 



wings with 8-10 antecubitals, the last not continuous, 

 7-9 postcubitals, triangle with one cross-vein, internal 

 triangle of three cells, three rows of post-triangular cells. 

 Hind wings with 6 (7 in one wing of i $ ) antecubitals, 

 7-9 postcubitals, triangle free (one, cross-vein in one wing 

 of I ,5 ), its inner side in the prolongation of the arculus, 

 no internal triangle, two rows of post -triangular cells, 

 sectors of the triangle arising from the same point. The 

 male from Miraflores has, in the left front wing only, one 

 basilar cross -vein which is continuous with the median 

 cross-vein. 



$ Differs from the male as follows : Abdomen not so 

 strongly dilated at the base when viewed from the side. 

 Appendages a little shorter than 9 H- 10, luteous, simple. 

 Vulvar lamina very small, not extending beyond 8, notched 

 in the middle of its margin. The San Jose female, miore- 

 over, has the face pale green, becoming yellowish on the 

 lips, the thorax less reddish, pale greenish around the 

 wing -bases, the last antecubital continued to the median 

 vein on both front wings. 



Total length S 37-42, $ 40-45. Abdomen S 24-28, ? 

 26-30. Front wing $. 33-36, ? 33-5-39- Hind wing c^ 

 33-34' ? 32-37-5- Sup. app. S 2.5. App. ? 2. Pteros- 

 tigma6 4' ? 3-7-4- 



These specimens agree in all points with the generic 

 and specific descriptions of Erytheiuis fiircata Hag. /. c. 

 Erythemis, as it has been defined by Mr. Kirby in his 

 "Revision of the Libellulinas " (Trans. Zool. Soc. Lon- 

 don, xii, p. 304, 1889), has, among other characters, the 

 sectors of the arculus distinctly stalked, hind wings with 

 the sectors of the triangle widely separated at their origins 

 and therefore three rows of post-triangular cells. Fiir- 

 cata Hag. therefore does not belong here, as has been 

 pointed out by Dr. Karsch /. c, but to Cannacria Kirby 



