NEUROPTERA— ODONATA— LIBELLULA FORENSIS. 919 



iESCHNA. 

 ^SOHNA CONSTRICTA, Say. 



jEschna constricta, Say, But. N. A., 1859, ii, 3S9 (LeConte's ed.).— Hagen, Synop., 

 123, f. 5.—H,, U. S. Geol. Surv. Terr., 1873, 591. 



Male and female specimens (No. 273 A) collected at Pagosa Hot 

 Springs, Colo., by Dr. H. C. Yarrow, September, 1874. 



Hab. — Common everywhere east of Mississippi, from Canada to Mary- 

 land, and west to Wisconsin and British Columbia. 



DIPLAX. 

 DIPLAX COSTIPEEA (f). 

 A number of specimens (Nos. 154 C and 273 A) of this species, both 

 male and female, were collected in New Mexico and Colorado by W. Gr. 

 Shedd and Dr. H. C. Yarrow. 



PLATHEMIS. 

 PLATHEM1S SUB-ORNATA. 

 A number of specimens (all in bad condition), male and female, col- 

 lected in New Mexico by H. W. Henshaw. 



MESOTHEMIS. 



MESOTHEMIS COERUPTA, Hagen. 



Mcsothemis comipta, Hagen, Syu. 171, f. 3.— Id,, U. S. Geol. Surv. Terr., 1873, 587. 



Collected in Arizona by H. W. Henshaw in 1874. 



Hab. — Common in Texas, California, and Illinois ; Colorado, New 



Mexico"?, Arizona. 



LIBELLULA. 



LIBELLULA FORENSIS, Hageu. 



Libcllula forensis, Uagen, Syn., 154, 9.— Id, U. S. Geol. Surv. Terr., 1S73, 585. 



A few females of this species were collected in Arizona by H. W. 

 Henshaw in 1874. 



Hab. — California, Victoria, Vancouver's Island, British Columbia, Mon- 

 tana, Arizona. 



Note. — L. forensis is very similar to L. pulclidla, a common species 

 everywhere east of the Rocky Mountains, but may be distinguished from 

 it by being larger and wanting the dark-brown tip of all the wings, besides 

 other differences. 



