320 NEUROPTERA. 
SYMPETRUM. 
Sympetrum, Newman, Ent. Mag. i. p. 511 (1833); Hagen, Entom. Amer. iv. p. 81 (1888) ; 
Kirby, Trans. Zool. Soc. Lond. xii. pp. 263, 265, 276 (1889); Cat. Odon. p. 13 (1890) ; 
Williamson, 24th Rep. Geol. Indiana, pp. 250, 321 (1900); Needham, Bull. 47 N. Y. St. 
Mus. pp. 507, 508, 519 (1901). 
Diplax, Charpentier, Lib. Eur. p. 12 (1840) ; Hagen, Syn. Neur. N. Amer. p. 173 (1861) ; Brauer, 
Verh. zool.-bot. Ges. Wien, xviii. pp. 369, 719 (1868); Calvert, Trans. Amer. Ent. Soc. xx. 
p. 224 (1898); Proc. Calif. Acad. Sci. (2) iv. pp. 472, 544 (1895) ; Kellicott, Odon. Ohio, 
pp. 92, 107 (1899); Ris, Mitt. schweiz. ent. Ges. x. p. 439 (1903). 
Mesothemis, C, Brauer, l. c. p. 722 (1868). 
Only two species of this cosmopolitan genus are unquestionably known* to 
occur in the present faunal district. A note on a peculiarity which they both 
possess is given on page 204, anted. They may be distinguished from each other 
as follows :— 
Reddish, legs luteous, wings with at least one dark basal streak, area between sub- 
nodal sector and supplementary sector next below with one row of cells, 
antecubitals 8-10 on the front, 6 on the hind wings, tip of vertex emarginated, 
superior appendages of male with the inferior denticles (viewed from below) 
forming an almost straight line, and the apex obliquely truncated when viewed 
in profile, vulvar lamina of female projecting . . . - - + + + se + 1. illotum. 
Olive or brown, legs black, femora and tibize with a superior yellow stripe, no dark 
basal streak to the wings, area between subnodal sector and supplementary 
- sector next below with two rows of cells, antecubitals 7 on the front, 5 on 
the hind wings, tip of vertex truncated, superior appendages of male with 
the inferior denticles (viewed from below) forming a reversed curve, and 
the apex gradually tapering in profile view, vulvar lamina of female not 
projecting 2 6 ee ee ee ee ee ee ewe  cOrruptum. 
1. Sympetrum illotum. 
Mesothemis illota, Hagen, Syn. Neur. N. Amer. p. 172 (1861) °. 
? Diplax illota, Selys, Ann. Soc. Ent. Belg. xxviii. p. 43 (1884) *. 
Diplaz illota, Calv. Proc. Calif. Acad. Sci. (2) iv. p. 545, t. 17. figg. 114-119 (details ¢ 2), 
(1895) *. 
* In the collection loaned me by Dr. O. 8. Westcott was a single male of S. vicinum, Hagen, labelled as 
from Lumija in Chiapas, Mexico. This species certainly occurs as far south as Texas, but no other Mexican 
specimens are known. In reply to my question as to the possibility of error in the label, Dr. Westcott 
wrote (May 22, 1905) :—“TI do not dare say that the Sympetrum vicinum, Hag., labelled Lum[ija] Mex., may 
not have been misplaced.” 
