ODONATA OF BAJA CALIFORNIA. 545 



Sy7i02'>sis of Species. 



1. Olive or brown; legs black, femora and tibiaa with a superior yellow 

 stripe; no dark basal streak to the wings. 6 Sup. app. with the infe- 

 rior row of denticles forming a reversed curve and the apex gradually 

 tapering when viewed in profile. $ Vulvar lamina not projecting. 



corruptee Hagen. 



2. Keddish; legs luteous; wings with at least one dark basal streak. 6 

 Sup. app. with the inferior row of denticles forming an almost straight 

 line and the apex obliquely truncated when viewed in profile. $ Vulvar 

 lamina projecting. illota Hagen. 



Both species have an additional transverse carina on 

 the fourth abdominal segment, and the vulvar lamina of 

 the female emarginated at the middle of the apex. 



37. DiPLAx coRRUPTA Hagen. PI. xvii, figs. 120-123. 



Mesothemis c. Hagen, Syu. Neur. N. A. p. 171, 1861; Proc. Bost. 

 Soc. N. H. xviii, p. 77, 1875. D. c. Selys, Ann. Soc. Eut. Belg. 

 xxviii, p. 43, 1884. Calvert, Trans. Am. Ent. Soc. xx, p. 264, 

 1893. 

 1 ^ 3? San Jose del Cabo, May, 1893. 

 1 San Jose del Cabo, September, 1893, G. Eiseu. 



30 16 San Jose del Cabo, October, 1893, G. Eisen. 

 1 2 Sierra Laguna, October, 1893, G. Eisen. 



335 21? 

 Distribution. Mexico (Baja California as above, Mat- 

 amoras) to Montana, California to Illinois, Pennsylvania 

 (rare) ; Ochotsk in Asia. 



38. DiPLAx ILLOTA Hagen. PI. xvii, figs. 114-119. 



Mesothemis i. Hagen, Syn. Neur. N. A. p. 172, 1861; Proc. Bost. 



Soc. N. H. xviii, p. 78, 1875. D. i. Selys, Ann. Soc. Ent. Belg. 



xxviii, p. 43, 1884; form virgida Selys I. c. p. 44; form gilva 



Selys p. 43. 

 8 S Mesa Verde, October, 1893, G. Eisen. 



5 1? Sierra Laguna, October, 1893, G. Eisen. 



13^ 1? 

 The three forms recognized by de Selys (i. c.) illota 

 type, virgida and gilva are distinguished by him as fol- 

 lows: 



