406 CALIFORNIA ACADEMY OF SCIENCES. [Peoc. 3D Ser. 



the hind wings, and the subtriangular space of the front 

 wings, occur independently and entirely out of correlation 

 with variations in the number of cells of either of the other 

 two. (Both italicized statements apply to Perithemis only.) 

 Lastly, these individuals from Tepic are larger than those 

 from the eastern United States — abdomen, 3 13-15. 5 mm., 

 ? 15 mm.; hind wing, 3 18-21 mm., ? 20 mm. 



41. Lepthemis vesiculosa Fabricius. 



Ltbellula vesiculosa Fabr., Syst. Ent., 1775, p. 421. 

 Lepthemis vesiculosa Kirby, Cat. Odon., 1890, p. 39. 



i 6 Mazatlan, Sept., 1894, Eisen and Vaslit. 



36 1 ? " Oct., 1894, 



43 1 ? 



42. Lepthemis verbenata Hagen. 



Lepthemis verbenata Hagen, Syn. Neur. N. Am., 1861, p. 162. 



i $ , no locality or date, probably Tepic, Eisen and 

 Vaslit. 



Hagen ' followed by Kirby 2 has referred verbenata to 

 attala Selys, with mithra Selys and annulata (pars) Ramb. 

 as other synonyms. I think verbenata is specifically distinct 

 on the following grounds: — 



1. Selys' description of attala 3 reads "abdomine cras- 

 sulo brevi" an expression not applying to verbenata Hagen, 

 the type of which I have studied in the Museum of Com- 

 parative Zoology. 



2. The same Museum contains a male and a female 

 with pin-labels in de Selys' handwriting, "Libellula isis De 

 Selys Bresil." They were, therefore, probably regarded 



1 Proc. Bost. Soc. Nat. Hist., Vol. XVIII, 1875. p. 74. 



2 Cat. Odon., 1890, p. 40. 



3 Sagra Hist. Cuba Ins., p. 445. 



