ODONATA OF BAJA CALIFORNIA. 489 



IscHNURA Charpentier. 

 Charp. Lib. Eur. p. 20, 1840. Selys, Bull. Ac. Belg. (2) xli, p. 258, 

 1876. Calvert, Trans. Am. Eut. Soc. xx, p. 221, 189.S. Micro- 

 nympha Kirby, Cat. Odon. p. 140, 1890. 

 Synopsis of the Western North American Species (males ouly). 

 Inferior appendages prolonged on the outer side into a slender, cylindrical 

 process whicb is not bifid, usually acute at tip and curved inwards. 

 A complete green antehumeral stripe. 



8-9 blue, a transverse, basal, black ring on 8, a transverse apical 



black spot on 9. /. Ramhtirii, var. credida Hag. 



8-9 blue, a lateral black stripe on each from base to apex, with or 

 without a transverse, basal ring on 8 and a transverse, apical 

 rin" on 9. !• erratica n. sp. 



No antehumeral stripe or spots. 



8-9 blue, a lateral black stripe on each from base to apex, 8 with a 

 transverse, basal black ring. /. exstriata n. sp. 



Inferior appendages bifid or trifid at apex. 



A complete f)ale (green or yellow) antehumeral stripe. 



8-9 blue, a lateral black stripe on each. /. perparva Selys. 



8-9 blue, 8 only with a lateral black stripe each side at base. 



/. deinorsa Hagen.* 

 Two small spots representing the upper and lower ends respectively 

 of antehumeral stripe. 



8-9 blue, a lateral black stripe on each. /. cervula Hagen. 



The superior appendages are also characteristic, see 

 plate XV. 



10. IscHNURA Ramburii Seljs, var. credula Hagen. 

 PI. XV, figs. 5, 6. 



Agrion credulum Hagen, Syn. Neur. N. A. p. 80, 1861. A.defixum 

 Hagen I. c. I. R. Selys, Bull. Ac. Belg. (2) xli, p. 272, 1876 

 (adds credula as a synonym, but does not mention differences). 

 Calvert, Trans. Am. Ent. Soc. xx, p. 240, 189.3. 



1 5 Comondu, not dated. 



9 , 2 black $ , 5 orange? , San Jose del Cabo, not dated. 



5 , 1 black 9, 7 orange?, San Jose del Cabo, Sept., 1893, G. Eisen. 

 2 orange?, San Jose del Cabo, Oct., 189.3, G. Eisen. 



15^ 17? 



Unknown to the writer. 



