Zool.-Vol. I.] CALVERT— ODONATA. 407 



by him as distinct from his attala, but they are the same 

 species as verbenata — and were so placed by Dr. Hagen. 



3. Specimens whose abdomens do correspond with 

 "crassulo brevi" were left by Dr. Hagen under distinct 

 specific labels, "M. mithra Selys " and "M. annulosa 

 Selys " in a separate drawer in the same Museum. 



4. Neither the collections there nor in Philadelphia con- 

 tain any transitional forms between the thick-abdomined 

 annulosa-attala-mithra group and the slender-abdomined 

 verbenata. 



I have not been able to find any other constant character 

 separating these. The nearest approach thereto is in the 

 proportions of the terminal abdominal appendages of the 

 male. In the majority of males of verbenata the inferior 

 appendage is one-third shorter than the superiors and does 

 not reach as far back as the inferior denticles thereof. In 

 the attala-mtthra-amiulosa group, the inferior appendage is 

 very little shorter — one-sixth to one-eighth — than the supe- 

 riors and reaches farther back than the last denticle of the 

 latter. A male of verbenata from Cuba by Poey 1 closely 

 approaches the proportions of the other group, however. 



That attala, mithra and annulosa are species distinct from 

 each other appears improbable. Annulosa Selys 2 has the 

 dark brown spot at the base of the hind wings reaching to 

 the triangle, in attala and mithra it does not extend so far, 

 mithra being distinguished by its narrower (9.5 mm.) hind 

 wings from attala* (11 mm.) In no individual of verbenata 

 does the brown at the base of the hind wings reach farther 

 out than the first antenodal. 



The distribution of the slender bodied verbenata is Cuba 

 (Poey), Hayti (Uhler), Jamaica (Bath by Mrs. Swainson, 

 Kingston by C. W. Johnson and W. J. Fox), Mazatlan, 

 Mexico, Oct., 1873 (Crotch), Porto Cabello, Venezuela 

 (Appun), Surinam (Thorey), Brazil (Selys); of the 



1 In the Mus. Comp. Zool. 

 s 1. c, p. 445. 



2 Selys 1. c, pp. 445, 446. 



