186 NEUROPTERA. 
between them a small superior metepisternal spot, tubercles at the bases of the wings and the interalar 
sclerites, posterior dorsal margin of abdominal segment 1; a median dorsal basal spot, a transverse 
lateral stripe enveloping the auricle and an anteapical transverse stripe on 2; @ pair of triangular spots 
just behind the submedian suture and a transverse anteapical stripe (interrupted by the mid-dorsal 
carina) on the dorsum of 3-8. 
Legs black, reddish-brown at bases. 
Posterior dorsal part of abdominal segment 1 elevated, clothed with whitish hairs, Auricles with but two 
distinct teeth. Dorsum of segment 10 with a median basal carinate tooth and a smaller tooth on each 
side of the median. 
Wings somewhat smoky toward the apex and along the posterior margin, reticulation blackish, but the costa 
with a brown line, pterostigma pale brown, membranule blackish tending to greyish at the base; discoidal 
triangles 4-celled, two of the cells on the proximal side, internal triangles 2-celled, 3 supratriangular 
cross-veins, 4-5 submedian cross-veins (other than those taking part in the internal triangle) on the front 
wings, 3 on the hind; at most three rows of cells between the subnodal sector or its lower branch and 
the supplementary sector next below; two rows of cells between the short sector and the supplementary 
sector next below at the level of the nodus, increasing beyond to three rows on tho hind wings only. 
Front wings with 16-17 antecubitals, the tirst and sixth thicker, 11 postcubitals. Hind wings with 
12 antecubitals, first and sixth thicker, 12-13 postcubitals; anal loop 9-10-celled, only one of which is 
central. 
Other details of this insect will be found in the synopsis on page 180. 
© unknown. 
Hab. Mexico, Cuernavaca (coll. Deam: 1 ¢). 
The unique type was taken July 8. 
Dedicated to Mr. E. B. Williamson, diligent and thoughtful as collector, student, 
and author in this group of insects, to whom I am indebted for the opportunity of 
examining the Deam Collection. 
Additional specimens will determine whether the blackish-brown frons of this 
individual is natural or is due to postmortem discoloration. 
5. Mshna brevifrons, (ab. VII. figg. 15, 16.) 
Aischna brevifrons, Hagen, Syn. Neur. N. Amer. p. 129 (1861) *. 
Hab. Mexico, Acapulco !.—Perv, Arequipa (W. J. Gerhart, A. N. S.: 12; 
A, Agassiz, M. C. Z.: 1 2); Cums, Valparaiso!, Bafios de Cauquénes (E. C. Reed, 
U.S. N. M.: 1 3). 
When I examined the Acapulco type, a male, at the Museum of Comparative 
Zoology, in June 1899, I noted that it had lost the apices of the superior appendages. 
6. Aishna luteipennis. 
“ischna luteipennis, Burm. Handb. d. Ent. ii. p. 837 (1839) '; Calvert, Proc. Calif. Acad. Sci. (2) 
iv. p. 503, t. 15. figg. 27, 28 (apps. ¢) (1895) ?; (8) Zool. i. p. 887 (1899) 2; Trans. Amer. 
Ent. Soc. xxv. pp. 58, 94 (1898) +. 
“Eschna excisa, Brauer, Verh. zool.-bot. Ges. Wien, xv. p. 906 (1865) ’; Reise d. Novara, Neur. 
p. 69, t. 1. fig. 19 (apps. g) (1866)°; Hagen, Verh. zool.-bot, Ges. Wien, xvii. p. 50 
(1867) *, 
schna florida, Hagen, Syn. Neur. N. Amer. p. 125 (1861) °. 
