58 NEUROPTERA. 
Legion 2. PODAGRION. 
The four genera of this fauna may be distinguished as follows :— 
Antecubitals 3-5; two submedian cross-veins, wings ceasing to be petioled 
before the level of the arculus. . . . . - «© © + © © + « + « ‘THAUMATONEURA. 
Antecubitals 2. 
Two submedian cross-veins, wings petioled to beyond the level of the arculus, 
supplementary sectors present between the superior and inferior sectors 
of the triangle ; postcostal space of two rows of cells . . . . . . PARAPHLEBIA. 
One submedian cross-vein, no supplementary sectors between the superior 
and inferior sectors of the triangle ; postcostal space of one row of cells. 
Supplementary sectors between the ultra-nodal and nodal (two), nodal 
and subnodal (two), subnodal and median (two), and median and short 
sectors (one) ; lower side of pterostigma equal to or shorter than 
its upper side; inferior appendages of the males well developed . . PHILOGENIA. 
Supplementary sectors between the ultra-nodal and nodal sectors only 
(two) ; lower side of pterostigma longer than its upper side; inferior 
appendages of the males rudimentary. . . . . . . . . . . Herenacrion. 
THAUMATONEURA. 
Thaumatoneura, McLachlan, Ent. Monthly Mag. (2) vin. p. 180 (1897). 
1. Thaumatoneura inopinata. (Tab. III. figg. 16, 21, 27.) 
Thaumatoneura inopinata, McLachl. Ent. Monthly Mag. (2) vii. p. 131 (1897)'; xi. p. 189 
(1900)°. _ 
Hab. Panama, Chiriqui ?. 
When this insect was described ! its habitat was unknown. It is included in the 
Central-American fauna on the authority of M. René Martin, reported by Mr. McLachlan’. 
I have not seen either of the two known specimens, but their owners have kindly supplied 
me with photographs, which I have studied. Mr. McLachlan referred this anomalous 
form to the Calopterygine, but I believe its relationships are with the present group 
of Agrionine. 
This species may readily be recognized by the black band on all four wings for their 
entire width from the nodus to more than halfway to the pterostigma. On the front 
wings, in the type, it reaches to very little more than halfway from the nodus to the 
pterostigma, its outer edge is convex and has a conspicuous excavation just below 
the costa: in M. Martin’s example it attains nearly two-thirds the distance from 
the nodus to the pterostigma, and its border is almost straight. On the hind wings it. 
reaches to two-thirds (type) or three-fourths (M. Martin’s ¢) the distance from the 
nodus to the pterostigma, and its outer cdge is distinctly concave in both. 
The type lacks the last six abdominal segments. ‘The Chiriqui male possesses them, 
