112 NEUROPTERA. 
Acambaro (Rhoads: 6 3,2 2), Patzcuaro (Rhoads: 2 3,2 2 ; Deam: 2 ¢), Urua- 
pam [2 ¢, 2 2], Texolo [5 3] (Rhoads), Vera Cruz (Sallé*, coll. P. P. C., ex coll. 
Selys: 1 3 with label “ prevarum” in de Selys’s handwriting), Tacuba [1 ¢ ], Mexico 
city [16 ¢, 15 9] (Barrett, F. D. Godman, H. H. Smith, Schumann, colls. Adams, 
P. P. C.), Pefion [1 2], Tlalpam [1 ?] (Barrett, coll. P. P. C.), Puebla (Richardson: 
1 3), Amula [4 ¢ ] and Tuxtla [1 2], Guerrero (H. H. Smith), Oaxaca (Deam: 1 3), 
Trojos de Oro (Saussure 12); ?Brirish Honpuras, Rio Sarstoon (Blancaneaur: 1 2, 
damaged, the identification doubtful). : | 
The Mexican individuals are dated from March to December. 
To the northward this species is represented by the closely-allied—if distinct— 
E. anna, Williamson [Ent. News, xi. p. 455, t. 9. figg. 1, 2 (1900)], of which I have 
seen three males and one female from Wyoming and Nevada. 
5. Enallagma semicirculare. (Tab. V. fig. 13.) 
Enallagma semicirculare, Selys, Bull. Acad. Belg. (2) xli. p. 517 (1876)’. 
3. The following data will supplement the incomplete description of de Selys', based on a single male :— 
Abdomen blue, with the following parts black: a basal spot on segment 1; a transverse, isolated, ante- 
apical streak, or a semicircular, anteapical spot (its convex side turned forward), connected by a “ tail ” 
with the apex of the segment on 2; and the apical fifth or sixth of 3 and 4; almost the whole of 5 and 6 
dark metallic green, except a narrow transverse basal ring; or, in the Misantla and Fuente males, only 
the apical sixth of 5 is black, 6 being as above described in that from Fuente, but having only the apical 
fourth black in the Misantla male; 7 black, except for a narrow, transverse, basal, medially interrupted, 
pale ring ; 8-10 entirely blue. 
The superior appendages instead of being “ trés-différents de toutes les autres espéces voisines par l’absence 
de lame ou de tubercle interne dilatés,” as de Selys states}, possess such a lamina, as shown in our 
figure. It is situated on the under surface of each appendage so close to the base as to be not easily 
recognized, the anterior edge of the lamina being usually concealed by the tenth segment on the death 
of the insect, thus giving the appendage the appearance described: ‘ vus de profil, ils sont épais a la 
base amincis réguliérement jusqu’au bout” +. When the appendages are extended, as in the individual 
from which our illustration was drawn, the lamina is clearly seen. 
Dimensions.— Abdomen 23-26°5 ; hind wing 16-18°5 mm. 
@. Unknown. 
Hab. Mexico, Fuente (coll. P. P. C, ex coll. L. Mengel: 1 3, last four segments 
lost, identification probable), Misantla (Ff. D. Godman: 1 3), Iguala (Barrett, coll. 
P. P. C.: 4 3), Venta de Zopilote (H. H. Smith: 1 ¢ ), “‘ Putla, sur le Pacifique” }. 
For the middle three localities cited, the dates of capture are March, September, and 
October respectively. 
6. Enallagma cecum. 
Agrion cecum, Hagen, Syn. Neur. N. Am. p. 84 (1861) °. 
Enallagma cecum, Selys, Bull. Acad. Belg. (2) xli. p. 528 (1876) *. 
Enallagma cecum, Calvert, Proc. Calif. Acad. Sci. (2) iv. p. 485, t. 15. fig. 8 (apps. ¢) (1895) °. 
¢. In all the specimens examined the black on segment 2 has the form of a U whose open end is directed 
forward. Only one male (from Kingston) has a bronze ventral thoracic spot near the abdomen, as 
