ODONATA OF BAJA CALIFORNIA. 473 



the last autecubital usually uot continued to the median vein; 

 abdomen stout, hardly as long as the hind wings, third tibiae 

 with the spines of the antei'o-inferior row few (5-7) and stout; 

 hamule of 5 bifid. Mesothemis. 



The generic characters given above have been drawn 

 up with the intention of making them definitive as ab- 

 solutely as possible, and not merely with reference to the 

 forms found in Baja California. 



Subfamily CALOPTERYGIN^. 

 HeTyErina Hagen. 



Hagen, Syn. Calopt. p. 30, 1853;.Mon. Calopt. p. 96, 1854. Walker, 

 List Neur. Ins. Brit. Mus. iv, p. 616, 1853. Calvert, Trans. Am. 

 Eut. Soc. XX, p. 220, 1893. 



I. Het^rina californica Hacjen. 



Hagen, Bull. Ac. Belg. (2) vii, p. 440, 1859; Syn. Neur. N. A. p. 59, 

 1861. Selys, Bull. Ac. Belg. (2) xxxv, p. 480, 1873. Hagen, 

 Proc. Bost. Soc. Nat. Hist, xviii, p. 23, 1875. 



Three males, two females, Comondu, March, 1889, 

 by Chas. D. Haines. 



They differ from the types by their smaller size (abdo- 

 men 528.5 mm., ? 24, hind wing 3 ? 22.5-23.5), less 

 number of antecubitals (17-21), and the lesser extent of 

 the basal red spot on the wings of the males, which reaches 

 but little more than half-way from the base to the nodus, 

 instead of four-fifths. Nevertheless they do not appear 

 to differ specifically from more typical individuals from 

 Shasta County, California, in the collection of the Ameri- 

 can Entomological Society in Philadelphia. In the writer's 

 collection are specimens from San Bernardino, California, 

 by Mr. P. C. Truman, which are similar to those from 

 Comondu. 



Califoniica is characterized by the absence of a ptero- 

 stigma in both sexes, and of red spots at the tips of the 

 wings of the male. Baron de Selys wrote (/. c. 1873) 



