ODONATA OF BAJA CALIFORNIA. 493 



II. ISCHNURA EXSTRIATA n. sp. PL XV, fig. 2. 



4,5 Sau Feruaudo, Baja California, Maj', 1S89, C. D. Haines (Calif. 



Acad. Coll.) 

 2 3 1? San Bernadino, Cal., Feb. -March, 1S92, P. C. Truman (P. P. C. 



Coll.) 

 2 $ Los Angeles, Cal., Dr. A. Davidson (P. P. C. Coll.) 



S Black with a metallic lustre, the following blue or 

 green: lips (except a transverse basal, black labral 

 stripe), rhinarium, frons, gen«, head below, a very small 

 isolated postocular spot each side, sides of thorax (except 

 a short superior line on the first lateral suture and a com- 

 plete line on the second), feet except an anterior black 

 stripe, 8-9 (except a lateral black band on each, from 

 base to apex, on 8 those of right and left sides united 

 by a transverse black band occupying the basal half to 

 third of the dorsum of the segment). A transverse, 

 basal, interrupted, yellow ring on 4-7. Forked elevation 

 on 10 not more than half as high as 10; viewed in profile 

 it commences at the base and rises at an angle of about 

 20°-25°; forked in less than its apical half; branches 

 divergent at less than 90". 



Superior appendages ver}^ short, one-fourth as long as 

 10, tubercular, with an inferior apical process. Inferior 

 appendages nearly half as long as 10, yellowish except 

 at tip, rather broad at base, then narrowed and prolonged 

 on the outer side as a slender process, which is cylin- 

 drical, not flattened, apex acute, curved inwards (similar 

 to the same appendages of /. -R a mbur ii ^inA verticallis^. 



Wings clear. Front wings with 7-9 postcubitals. No- 

 dal sector arising near the fourth postcubital on front 

 wings, near third on hind wings. Pterostigma on front 

 wings, surmounting less than one cell, longer than wide, 

 outer side straight; blackish, upper outer corner pale; on 

 hind wings smaller, gray. 



$ Differs from the 3 as follows: luteous replacing blue; 



