408 SUPPLEMENT. 
PERITHEMIS (p. 309). 
Perithemis domitia, form intensa (p. 311). 
To the localities given, add :—Mexico, Nogales [2 ¢ ] in Sonora, Yurecuaro [3 ¢, 
6 2] in Michoacan, Ocotlan [2 ¢] (Calvert, coll. P. P. C.) and San Marcos [ Gold- 
smith: 5 & ] in Jalisco, Chichen Itza [Cole: 8 ¢ ] (M. C. Z) in Yucatan. 
Intermediates between intensa and other forms. 
Two other males from Ocotlan (ibtd.): one has the discoidal triangle on the left 
hind wing free, the other has both hind wings with the discoidal triangle free and five 
antecubitals; otherwise both individuals have the venation of intensa as given anted, 
p. 310. Another male from San Marcos has the following exceptions to the venation 
of intensa: discoidal triangle on left hind wing free, five antecubitals on both hind 
rings. 
Perithemis domitia, form iris (p. 313). 
Venation as given under i., 1. c. Of the following two males from Presidio, one has the front wings with the 
discoidal triangles free, internal triangles two-celled, all wings with a brown spot at the distal angle of 
the discoidal triangle and one at the oblique vein (of Comstock and Needham), larger and more intense 
on the hind pair; the other has front wings with both discoidal and internal triangles 2-celled, and the 
above-mentioned spots represented only by minute traces of brown. The San Marcos example has no 
.. dark spots on the wings. 
To the localities given, add:—Muxico, Presidio in Vera Cruz (Barrett, coll. 
E. A. Smythe, Jr.: 2 3), San Marcos in Jalisco (Goldsmith, M. C. Z.: 1 3). 
This San Marcos example presents another puzzle in the geographical distribution 
of Perithemis. | 
Venation as given under ii. p. 314. 
‘To the localities given, add :—Costa Rica, Rio Machuca (Biolley, A. N. 8.: 1 3 ). 
- Perithemis domitia, form tenera (p. 316). 
In three of the eight females from San Pedro there is a faint yellow hind marginal band on the hind wings 
from the transverse nodal band to the apex. All four males have a brown spot at the distal angle of 
each discoidal triangle. Dimensions of the San Pedro examples: abdomen, ¢ 14°5-15, 9 11°5-14°5 ; 
hind wing, ¢ 19, 2 185-20 mm. 
To the localities given, add :—Mexico, San Pedro in Coahuila (Calvert, coll. P. P. C.: 
43,82). 
a SYMPETRUM (p. 320). 
Sympetrum corruptum (p. 323). 
To the localities given, add :—Mexico, Nogales [1 é | in Sonora, Guzman llg,1¢] 
in Chihuahua, San Pedro [1 ¢ ], in Coahuila, Aguascalientes City [1 ¢ ], Ocotlan [1 ¢ ] 
(Caluert, coll. P. P. C.) in Jalisco. 
This was the most abundant Libelluline at Nogales, August 12. At Guzman a pair 
were observed ovipositing together. 
