PALZMNEMA.—NEONEURA. 137 
Were it not for the difference in the shape of the male-appendages, I should hesitate 
to separate this pair from the individuals which I have above referred to P. angelina. 
5. Palemnema domina, sp. n. (Tab. V. fig. 42.) 
Palemnema domina, Hagen, in litt. 
Hind lobe of prothorax entirely blue, without black markings, a black stripe on the second lateral thoracic 
suture. Superior sector of the triangle ending 4-6 cells beyond the level of the origin of the ultra-nodal 
sector on the front wings, 7-8 on the hind. Pterostigma on the front wings surmounting 2-3 cells, its 
eostal edge measuring 1-1-1 mm. long. Posteubitals on the front wings 20-21 ¢,18 9, on the hind 
wings 18 ¢,17 9. Abdomen of both sexes partially destroyed; hind wing ¢ 23, 2 24mm. 
Hab. Mexico, Isthmus of Tehuantepec (Sumichrast, M. C. Z.: 1 6,1 9). 
The only justification of the separation of this pair from P. angelina or P. nathalia 
is in the shape of the male-appendages *, briefly described on p. 134 and figured on 
our Plate. Both male and female appear to be teneral. 
NEONEURA. 
Neoneura, Selys, Bull. Acad. Belg. (2) x. p. 459 (1860)*; Mém. Couron. Acad. Belg. xxxviii. 
p. 198 (1886) ° 
Cenoneura, Kirby, Cat. Odon. p. 136 (1890) °. 
Mr. Kirby ® has apparently rejected the name Neoneura on the ground of the existence 
of the name Neoneurus proposed by Haliday in the Hymenoptera in 1838. I revert to 
de Selys’s name for the same reasons that have caused me to retain [schnura, which 
presents a parallel case (vide supra, p. 122). 
Two species of this genus have been described from the Antilles, and six others from 
South America. Two new forms are represented in the Central-American or Texan fauna, 
and are referable to a group characterized by de Selys? as having the first transverse vein 
distal to that descending from the simple nodus at the hind margin of the wing, ending 
a little more remote than the tip of the superior sector of the triangle, the superior 
appendages of the male with a short inferior branch, the abdominal dorsum black, with 
a pale dorsal line on most of the segments. In this group de Selys placed the two 
Antillean species and two from Parad. The two new forms appear to be peculiar in 
this genus in having the inferior appendages of the males longer than, instead of equal 
to or shorter than, the superiors. Of the female sex of N. ametia I have not sufficient 
material to venture a brief statement of its difference from WV. aaroni; reference must 
therefore be made to the following descriptions. The males, besides differing in their 
appendages, as shown in Tab. V. figg. 36, 37, may be distinguished as follows :— 
Dorsum of abdominal segments 2 and 3 chiefly orange-red. . . . « . - « « « amelia. 
Dorsum of the same brown or black, 3 with a pale mid-dorsal line . . . . . . . ([aaroni.] 
* The appendages were accidentally destroyed after the figure and the brief description were made. 
BIOL. CENTR.-AMER., Neuropt., April 1903. t 
