314 NEUROPTERA. 
ii. Front wings with two post-triangular rows increasing to three rows near the level of origin of the 
subnodal sector, decreasing to two rows at or a little proximal to the level of the nodus, again increasing 
to three rows beyond the nodus, and so continuing to the margin, internal triangle free. 
None of these males have a darker spot at the distal angle of the discoidal triangles. One from Gualan and 
another from Sanarate have the post-triangular rows of the front wings asymmetrically as given here 
under ii., and as below under iii. The post-triangular rows of the front wings of 1 g 12 Amatitlan, 
2 ¢ Gualan, are asymmetrically as here given under i. and ii, The Amatitlan females lack any apical 
spot or marking on the hind wings, there is very little colour in the submedian spaces, and the subcostal 
vein is bordered with blackish-brown from base to first antecubital on the hind wings, to a less distance 
on the front. 
Abdomen, ¢ 9 13-13°5; hind wing, 3 18-18°5, 9 19-20 mm. (Amatitlan). 
” 3 12-135; ,, » 6 16-19 mm. (Santa Lucia). 
Hab. Mzxico, Teapa (H. H. Smith: 1 3); Guatemata, Gualan [7 ¢ ], Zacapa [1 ¢ ], 
El Rancho [1 ¢ ], Sanarate [3 ¢], Amatitlan [3 ¢, 2 2], Laguna [1 ¢ ], Santa Lucia 
[5 ¢ | (Williamson, Deam, Hine, colls. Willmsn., O. S. U.). 
Taken in January and February. 
iii. Front wings with two post-triangular rows increasing to three rows near the level of the nodus and 
so continuing to, or almost to, the wing-margin, internal triangle free. 
The males have no darker wing-spots. The females are coloured as the preceding Amatitlan females, except 
that one Amatitlan female has a yellow band less than 1 mm. wide half-way across the wings just 
beyond the nodus. 
Abdomen, 6 125, 9 12°5-13; hind wing, ¢ 17, 9 18-18°5 (Laguna). 
» 6 13-14, 913-135; ,, 4, o 18-185, 2 18-19-5 (Amatitlan). 
Hab. Guatemaua, Laguna (Maxon & Hay, U.S.N.M.: 138)[1 46,22 |, Santa Lucia 
[1  ], Lake west of Guatemala City [1 9 ], El Rancho [1 ¢ ], between Gualan and 
El Rancho [1 ¢ |, Amatitlan [2 ¢,5 2] (Williamson, Miller, Hine, colis. Wilimsn., 
0. S. U.). 
Taken in January and February, by Mr. Williamson; March 10, by Messrs. 
Maxon & Hay. 
A male from Colon, Panama (Howland, coll. Needham), abd. 14, hind wing 18 mm., 
has the post-triangular rows on the right front wing as given above under i., on the 
left front wing as under iii., the internal triangle free on both sides. 
I know of no means of distinguishing the males listed under iris from males with 
the same venational peculiarities mentioned under forms domitia, mooma, or tenera. 
The identification of this form as 277s, Hagen, rests solely on my interpretation of the 
brief description, as Mr. Henshaw has written me in answer to a special inquiry 
concerning Hagen’s type: “I cannot find Perithemis iris so labelled. There are 
several Brazilian specimens and some Mexican [in the M. C. Z.], but none from 
Alvarado” (ef. Hagen 15), 
d. Form mooma. (Tab. VI. figg. 19-27 *.) 
Perithemis mooma, Kirby, Ann. & Mag. Nat. Hist. (6) iv. p. 283 (1889) ””. 
* On the second line from the bottom of the explanation of Pl. VI. for 37 and 44 respectively, read 
20 and 27. 
