ODONATA OF BAJA CALIFORNIA. 481 



from apex almost to base ; sides of abdomen inferiorly 

 blue. Appendages half as long as lo, blue. 



$ ? Wings with a slight yellowish tinge. Pterostigma 

 dark brown ( 5 ) or luteous ( ? ), surmounting one cell 

 only or more. Front wings with 13-20 postcubitals, 5 dis- 

 coidal cells (6 in one wing of one female). Hind wings 

 with 12-16 postcubitals, 4 discoidal cells (5 in one wing 

 of one male). 



Abdomen $ 34-35, ? 29-31. Hind wing S 25-26, ? 

 23-26. 



Baron de Selys examined one of the males from San 

 Jose del Cabo, which had been dried after being in alco- 

 hol, and wrote of it, " me par ait tres-voisine de cnfrcea — 

 pent etre cuprcea elle-meme, mais a couleurs metalliques 

 puisque ternies; peut-etre par le mode de dessication ou 

 bien avoir ete dans I'alcool." 



Distribution. Mexico (Cordova, Baja California as 

 above). 



6. Argia cenea (Hagen) Selys. PI. xv, figs. 21-22. 



A. ce. Selys, Bvill. Ac.Belg. (2) xx, p. 407, 1862. 

 6 5 Sau Jose del Cabo, Oct., 1893, G. Eiseu. 

 1 5 Mesa Verde, Oct., 1893, G. Eiseu. 



5 Eyes above bright red, like sealing wax in appear- 

 ance, behind brown, below cream colored. Head metal- 

 lic brown; frons, gena^, rhinarium, mandibles, lips and 

 a cuneiform postocular spot each side — ochre. Rear of 

 head blackish, obscurely yellowish along the margins of 

 the eyes below. Dorsum of prothorax and of thorax 

 metallic brown, reaching almost as far on the latter as the 

 (obsolete) first lateral suture; a short, narrow, ochre 

 stripe on the upper half of the humeral suture, but not 

 reaching the base of the front wings (this stripe sometimes 

 obsolete), and above it a small isolated violet spot; sides 

 of thorax behind first lateral suture violet, a black line 



