ODONATA OF BAJA CALIFORNIA. 499 



Subfamily GOMPHINy^. 

 Progomphus Selys. 



Selys, Bull. Ac. Brux. xxi (2), p. 69, 1854. Monog. Gomph. p. 194, 

 1857. 



13. Progomphus obscurus Rambur. PI. xvi, figs. 

 74-79- 



Diastatomma 0. Raaib. Ins. Nevr. p. 170. P. 0. Selys, Bull. Ac. 

 Brux. xxi (2), p. 72, 1854; (2) xlvi, p. 658 (1878); Monog. Gomph. 

 p. 201, 18.57. Hagen, Syn. Neur. N. A. p. 110, 1861; Proc. 

 Bost. Soc. N. H. xviii, p. 48, 1875. Progomphus borealis (Mc- 

 Lachlan) Selys, Bull. Ac. Belg. (2) xxxv, p. 764, 1873. Hagen, 

 Proc. Bost. Soc. N. H. p. 356, 1874; xviii, p. 48, 1875. 

 1 S San Luis, April, 1889, C. D. Haiues. 



1 Sierra El Taste, Sept., 1893, G. Eisen. 



2 San Jose del Cabo, Sept., 1893, G. Eisen. 



1 4$ San Jose del Cabo, Oct., 1893, G. Eisen. 

 1 San Jose del Cabo, not dated. 



2 1 (? just transformed) Miraflores, Sept., 1894, Eisen & Vaslit. 



7S 6? 

 A comparison of all the present material with the de- 

 scriptions of de Selys, 1873, and Hagen, 1874, follows: 



S Frons olive, its superior, transverse, brown band in 

 front of the ocelli produced but little or not at all in the 

 middle. Nasus paler than the frons, yellowish-green, 

 obscure in the middle, rhinarium still paler, lips colored 

 nearl}^ as nasus. Vertex brown, behind the two posterior 

 ocelli is a greenish area not reaching the occiput how- 

 ever. Hind margin of occiput very slightly convex. Two 

 yellow spots behind each eye, in some cases confluent. 

 Inferior " humeral " stripe or line (really antehumeral, 

 thus making two antehumeral stripes) present or absent; 

 in the former case united with a spot above, in the latter 

 case there are merely the two " superior yellow spots " 

 which are, strictly speaking, one ante-, the other post- 

 humeral. As compared with Mon. Gomph. p. 202, the 

 yellow antehumeral bands unite with the yellow of the 



