142 NEUROPTERA. 
on the front wings, 4-6 cells on the hind ; superior sector of the triangle ending at one-third to three- 
fourths of the cell beyond the cross-vein descending from the nodus; pterostigma rhomboidal, dark 
brown or black, surmounting one cell or very slightly less. Posteubitals, front wings 13-14, hind 
wings 11-12. 
Dimensions.—Abdomen, ¢ 42-43, 9 36-87; hind wing, ¢ 23-24, 2 25°5-27 mm. 
Hab. Guatemata!, Panima in Vera Paz (Champion: 4 ¢, 2 2, one pair taken 
in coitu). 
Comparison of the two sexes suggests that, 7m coitu, each superior appendage of the 
male is received between the two prongs of the mesothoracic process of the same side 
of the female, and in this way a perfect interlocking would be the result. Few females 
among the Odonata possess such a highly developed copulatory structure on any part 
of the body. P. peramans is much larger than any other species of Protoneura yet 
described. 
2. Protoneura cupida, sp.n. (Tab. V. figg. 46, 47.) 
dg. Black; front edge of labrum, labium, and metasternum pale yellow ; the following parts light blue: gene, 
a transverse frontal band, first joint of antenne anteriorly, dorsal surface of prothorax (except the sutures, 
which are black), an antehumeral stripe, almost half as wide as the mid-dorsal black and which attains 
the humeral suture near its lower end, where it is confluent with a narrower mesepimeral stripe, 
metapleura except for a black stripe on the second lateral suture, sides of abdominal segments 1 and 2, a 
longitudinal mid-dorsal stripe on 2, a very small basal dorsal spot on 3-7, and a transverse isolated ante- 
apical stripe on each side of 9, absent in one ¢. Legs pale blue, femora superiorly, especially in their 
distal halves, and first tibie superiorly, blackish. 
Hind margin of prothorax convex, entire. Superior abdominal appendages about two-thirds as long as 10, 
rather thick, obtuse at tip, inner margin with a basal tubercle. Inferiors slightly longer than the 
superiors, more slender, apex acute, an acute superior tooth at about half their length. 
9. Differs from the male as follows: yellow replacing the light blue; dorsal surface of prothorax black, 
the inferior margins, four very small streaks on the middle lobe and a median dot on the hind lobe, 
yellow ; mid-dorsal thoracic earina yellow, no pale antehumeral stripe, a yellow humeral (or more exactly 
anterior mesepimeral, as it corresponds to this stripe in the male) line; dorsum of abdominal segment 2 
entirely black (remainder of the abdomen lost). Hind margin of prothorax as in the d. Anterior 
mesothoracie border with a slender acute process behind each mesostigma, directed forward and upward. 
¢ 2. Wings hyaline, arculus distinctly beyond the second antecubital, its lower limb very little longer than 
the upper; nodal sector arising at the fifth postcubital on the front wings, at the fourth on the hind ; 
ultra-nodal sector beginning 2—4 cells proximal to the inner brace-vein of the pterostigma on the front 
wings, 1-3 on the hind; superior sector of the triangle ending about one-half cell beyond the cross-vein 
descending from the nodus; pterostigma rhomboidal, dark brown or black, surmounting one cell or a 
very little less, Postcubitals, front wings 10-12, hind wings 9. 
Dimensions.—Abdomen, ¢ 31-33; hind wing, ¢ 18-19, 9 195 mm. 
Hab. Guatemata, Livingston (Wilson, M. C. Z.: 36,1 2). 
The specimens described were collected between February and April. 
The female is interesting on account of its anterior mesothoracic process, a 
structure which appears to be homologous with the similar process already described 
(antea, p. 141) for P. peramans. In P. cupida this process is simple, not bifid, the 
place of the lower or anterior branch of P. peramans being here taken by the 
thoracic surface. It seems likely that, in coitu, the superior appendage of the 
