ODONATA OF BAJA CALIFORNIA. 49I 



ISCHNURA? ERRATICA n. Sp. PL XV, fig, I. 



13,1? Mendocino county, California (Am. Ent. Soc. Coll.) 1 M ? 

 Olympia, Washington, July 8, 1893. T. Kincaid (P. P. Calvert's 

 Coll.) 



3 Black, the following blue or green: lips, head below, 

 frons anteriorly, postocular spots, a complete antehumeral 

 stripe each side, sides of thorax (except a superior black 

 line on the first lateral suture and a complete line on the 

 second), pectus, abdomen below, apical dorsal half of i, 

 a wavy, transverse, apical band on 2, a dorsal band on 

 the apical five-sixths of 7, 8 and 9 (except a lateral black 

 band on the side of each, reaching from base to apex, 

 those of 8 united by a narrow, transverse, basal, black 

 band and of 9 by a transverse, apical band in the Cali- 

 fornian male, but not united on either 8 or 9 in the Wash- 

 ington example), feet except an anterior black stripe. A 

 narrow, transverse, basal, interrupted, yellow ring on 3-7. 

 Hind margin of prothorax rounded, emarginate in the 

 middle. Forked process on 10 about half as high as 10 

 itself; viewed in profile, it commences near the middle of 

 10 at an angle of about 50° ; forked in less than its apical 

 half, branches divergent at 90° or more. 



Superior appendages black, very short, one-fourth as 

 long as 10, tubercular, with a slender, inner, inferior pro- 

 longation reaching to the base of the inferior appendages. 

 Inferior appendages two-thirds as long as 10, similar to 

 those of exstriata, but with the apical process a little 

 more robust and curved upwards as well as inwards at 

 the extreme tip. 



Wings clear. Front wings with 9-12 postcubitals, 

 nodal sector arising near fifth antecubital, on hind wings 

 near the fourth. Pterostigma of front wings surmounting 

 a little more than one cell, very obhque, nearly equilateral, 

 bicolored, inner half blackish, outer half reddish; of the 

 hind wings much smaller, hardly surmounting one cell,. 



