482 CALIFORNIA ACADEMY OF SCIENCES. 



on the second lateral suture; pectus pale luteous. Feet 

 luteous or yellowish, femora superiorly, tibiee inferiorly 

 and tarsi black; the black on the second and third femora 

 usually separated into two stripes in the proximal half. 

 Violet or violet-blue predominant on the abdominal dor- 

 sum, the following markings black: a small mid-dorsal 

 basal spot and an oblique stripe each side on i ; a longi- 

 tudinal stripe on each side of dorsum of 2, dilated before 

 the apex, and an inferior curved stripe on the sides; 

 apical part (increasing from about the third on 3 to more 

 than the half on 6) of 3-6 black, cleft anteriorly on the 

 mid-dorsal line; almost the whole of 7, except a nar- 

 row, transverse, basal ring; an inferior, longitudinal stripe 

 on the sides of 8-10; sterna of 8-10. 



Hind margin of 10 notched in the middle, as usual in 

 Arg-m, sides of notch thickened. Appendages black; 

 superiors nearly as long as 10, slightly curved, extreme 

 apex bifid, branches equal. Inferior appendages slightly 

 longer, wider, directed upwards, inner edge blue, apex 

 bifid, branches equal. 



Wings clear; pterostigma dark brown, surmounting 

 one cell. Front wings with 13-16 postcubitals, 5 discoi- 

 dal cells (6 in one wing of one male). Hind wings with 

 10-14 postcubitals, 4-5 discoidal cells. 



Abdomen 29-30.5. Hind wing 22. 



? Unknown. 



Having sent a male of this species to Baron de Selys, 

 he wrote of it, " Je la crois cenea.''^ 



Distribution. Mexico ( Cordova, Terres-Chaudes, Tam- 

 pico, Baja California as above). 



