206 NEUROPTERA. 
Hab. Unrrep States, Kansas ®, Fort Collins (coll. Colo. Agr. Coll., P. P. C. det.) and 
Denver (Beales, coll. P. P. C.: 1 2) in Colorado, City Creek Cafon (H. Skinner, 
A. N. 8.: 16,22), Utah Lake* and Beaver Valley (Hngelhardt & Doll, Mus. 
Brooklyn Inst.: 1 3,1 2) in Utah, Ontario (Kellogg MS.), Los Angeles (A. Davidson, 
coll. P. P. 0.: 1 s) and San Diego!3 in California, Tucson (Jf. C. Z.) in Arizona 5, 
Dimmitt Lake near Roswell * in New Mexico 23, Pecos River !*, Texas (Capt. Pope, 
coll. P. P. C. ex coll. Uhler: 1 2).—Muxico (McLachlan in litt., 20. i. 1904), 
Guadalajara (Schumann: 2 3). 
Taken in July at Guadalajara, from April? to August ® in the United States. 
Differs from P. lydia, Drury (trimaculata, De Geer), widely distributed throughout 
the United States (except in the region occupied by subornata), by its yellow ante- 
humeral stripe, black legs, dark bands of the wings similar in the two sexes, and by 
the male structural character mentioned above. 
LIBELLULA. 
Libellula, Linn. Syst. Nat. ed. x. 1, p. 543 (1758); Hagen, Syn. Neur. N. Amer. p. 150 (1861) ; 
Brauer, Verh. zool.-bot. Ges. Wien, xviii. pp. 8366, 730 (1868). 
Leptetrum, Newman, Ent. Mag. i. p. 511, note (1833); Kirby, Trans. Zool. Soc. Lond. xii. p. 286 
(1889) ; Cat. Odon. p. 26 (1890). 
Belonia, Kirby, ll. cc. pp. 288 (1889), 28 (1890). 
Holotania, Kirby, ll. cc. pp. 288 (1889), 29 (1890). 
Ladona, Needham, Canad. Ent. xxix. p. 146 (1897); Bull. 47, N. Y. St. Mus. pp. 507, 509, 528 
(1901) ; Foerster, Mitt. Bad. Zool. Ver. no. 15, p. 5 (1902). 
Assuming, from the standpoint of historical continuity, the type of Libellula to be 
quadrimaculata, L., I have statistically studied the types of the last three proposed 
genera whose names stand above. Asa result, I have been unable to find characters 
of sufficient constancy to separate them from Libellula. 
Key to the Mexican and Central-American Species. 
A. Wings without blackish spots at the nodi, discoidal triangle of hind wing 
cross-veined, abdominal segment 8 of female perfoliate. 
B. Abdomen rather slender, e. g. segment 5 at least one and one-half times 
as long as wide. Wings yellowish or reddish-yellow along the anterior 
margins, their apices often smoky especially in the female, stigma 
yellow or red, membranule grey, hind wing with one submedian cross- 
vein, abdomen yellow (becoming red with age) with a mid-dorsal brown 
stripe. Abdomen, g§ 345-40, 2? 31-365; hind wing, ¢ 36-43, 
? 36-41°5 ; pterostigma, front wing, 6-65 mm. . . . . . . . IL. auripennis. 
BB. Abdomen stout, e. g. segment 5 at least as wide as long. 
C. Pterostigma moderate, 35-45 mm. long on front wing. Wings 
somewhat smoky, more marked in female, a faint tinge of yellow 
