408 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



thick-bodied annulosa, etc., is Cuba (Gundlach, Poey), 

 Rio Janeiro (Winthem) and Paramaribo (Thorey), Brazil. 

 These studies on verbenata caused me to study the char- 

 acters separating the "genera" Lepthemis and Mesothemis, 

 and I have been able to find no constant character other 

 than the shape of the abdomen. Verbenata is from this 

 point of view a Le-pthemis, attala-mithra-annulosa, a Meso- 

 themis. A surprise was to find, from an examination of the 

 type, that credula Hagen 1 is also a Mesothemis. 



II. Supplementary Notes on the Odonata of Baja 



California. 



16. 2 -3£schna cornigera Braner. 



sEschna cornigera Calvert, Proc. Cal. Acad. Sci., 2d Ser., Vol. IV, 

 1393-94, P- 507, H. XV, figs. 24, 31, 32. 



I have studied Brauer's male type in the K. K. Hofmu- 

 seum at Vienna and found the following differences in neu- 

 ration from my description: — 



Front wings: 15 (right) 14 (left) antecubitals, 11 (right) 9 (left) postcubitals, 

 4 (right) 3 (left) [subl median cross-veins. Hind wings: 11 (right) 10 (left) 

 antecubitals, 13 (right) 12 (left) postcubitals. 



Dimensions: Total length 58 mm. ; abdomen 44 mm.; superior appendages 

 4.75 mm.; front wing 41 mm.; hind wing 40 mm.; pterostigma 2.5 mm. 



I do not think that these measurements indicate specific 

 difference. 



24. Tramea longicauda Brauer (?) var. 



Tramea longicattda Calvert, Proc. Cal. Acad. Sci., 2d Ser., Vol. IV, 

 1893-94. P- 514, PI, XVII, figs. 88, 89. 



I have studied Brauer's male type of this also at Vienna. 

 It differs from my description as follows: — 



Male. Superior appendages 4.5 mm. long (8+9+10=5 mm., 9+10=3 

 mm.) Inferior appendage not quite half as long as the superiors, but 



1 Syn. Neur. N. Am., p. 184. 



2 The numbers refer to the species mentioned in a former report. Proc. Cal. Acad. 

 Sci., 2d Ser., Vol. IV, 1893-94. 



