50 NEUROPTERA. 
but again divergent in the apical fourth; they reach considerably beyond the level of the apex of the 
straight edge of the superiors; in profile view they are almost horizontal. Front wings with 11-12 
postnodals; inner edge of the black pterostigma more oblique than the outer edge, such a difference not 
being apparent on the hind wings. 
Abdomen 31-32, hind wing 21 mm. 2 unknown. 
Hab. Uxitup States, Texas, probably near the Nueces River (4. NV. 8.: 1 ¢).— 
Mexico, Iguala in Guerrero (Barrett, coll. P. P.C.: 1 old ¢ ). 
Judging from the appendages, the nearest ally of L. s’gma seems to be L. spumarius, 
Selys, two males of which from Cuba (J.C. Z.) are now before me. JL. spumarius 
differs in these structures, however, having the superiors more slender throughout, the 
basal tooth smaller, the straight edge on the inner margin less distinct, the inferiors 
shorter (half as long as the superiors), not divergent at their tips. The rear of the 
nead of LZ. spumarius is yellow, the colouring of the thoracic dorsum is much as in 
L. tenuatus. 
The S-shape of the inferior appendages of ZL. sigma recalls those of L. unguiculatus, 
Hagen, and has suggested the specific name. 
4, Lestes forficula. (Tab. III. fig. 25.) 
Lestes forficula, Rambur, Ins. Névr. p. 247 (1842) '; Hagen, Syn. Neur. N. Am. p. 68 (1861) ’; 
Selys, Bull. Acad. Belg. (2) xiii. p. 308 (1862) °; Kirby, Cat. Odon. p. 161 (1890) *. 
Hab. Uxirep States, Texas, probably near the Nueces River (4. VW. S.: 4 6,1 2). 
— Mexico 23, Frontera in Tabasco (//. HZ. Smith: 1 2 ).—Gutana, Cayenne®; BraziL2°, 
Para? ; West Inpigs, Cuba ?°, Haiti (Cabot, M.C.Z.: 2 3). 
The black which Hagen? mentions as margining the metallic green mesepisternal 
stripe, and as occurring on the sides and lower surface of the thorax, is probably an 
accompaniment of old age, as the only instance of its occurrence in the present 
material is in a male from Haiti with considerable pruinosity on the body. In this 
Haitian male, moreover, the metallic green stripe on the mesepisternum is almost as 
wide as in L. tenuatus, and de Selys* has noted a similar condition in Rambur’s type ; 
but the majority of individuals have this stripe of the width noted in the preceding 
synopsis. 
5. Lestes tenuatus. 
Lestes tenuatus, Kambur, Ins. Névr. p. 245 (1842)"; Hagen, Syn. Neur. N. Am. p. 69 (1861) ?; 
Selys, Bull. Acad. Belg. (2) xiii. p. 315 (1862) °; Kirby, Cat. Odon. p. 162 (1890) ‘; Calvert, 
Proc. Calif. Acad. Sci. (3), Zool. 1. p. 376, t. 25. fig. 3 (apps. ¢) (1899) *. 
Hab. Mexico, San Blas (Schumann: 1 3, 1 2), Tepic (Hisen & Vaslit®), Atoyac 
(H. H. Smith: 2.3, 5 2), San Lorenzo, Cordova (Trujillo: 1 ¢ ).—West Lnp1zs, 
Cuba (M. C. Z.: 1 6, 1 2, with label “ LZ. tenuatus” in de Selys’s handwriting), 
Jamaica 5, Martinique! 3, St. Lucia (U. S. Fish Commission, U. S. N. M.: 1 3). 
