HETERAGRION. 63 
1. Heteragrion tricellulare, sp.n. (Tab. V. fig. 5.) 
gd. Generally reddish-yellow, except as follows: lips, clypeus, and frons paler yellow or possibly sometimes 
blue in life, the last golden-yellow; vertex from eye to eye, anterior lobe, margins and a middle spot on 
posterior lobe of prothorax black; a narrow mid-dorsal thoracic stripe, but little wider than the carina, 
and the terminal sixth to eighth of segments 3-6 blackish; femora anteriorly, tibie inferiorly, and an 
ill-detined postbasal half of segments 4—7 brown (leaving a transverse basal ring and the fourth and fifth 
sixths reddish-yellow); a wide dark red antehumeral stripe; 8-10 pale yellow, 10 with a black mid- 
dorsal line on a low carina. 
Superior appendages about equal in length to segment 9, three times as long as 14), curved toward each other, 
the median tooth large, acute, and placed almost exactly at their middle; above this tooth is a smaller 
one and several denticles extending towards the base. 
Q. Head and thorax pale yellowish-brown, the following parts black or dark brown: a median spot on (or the 
entire) labrum, most of the clypeus, “step ”-like part of frons (these three shining), a transverse stripe 
from eye to eye at the antenns, vertex, anterior prothoracic lobe, a large middle spot on posterior 
prothoracic lobe, a mid-dorsal thoracic and an antehumeral stripe, these subequal, a small isolated mes- 
epimeral streak, apical ring (sixth on 3-6) on segments 2-6, dorsum of 7, basal dorsal half of 8 or a 
dorsal stripe for its entire length. ‘The basal dorsal half, or the entire dorsum, of 3-6 (behind a narrow, 
transverse, basal, yellow ring) is dark brown, and there is a superior dark brown stripe on either side of 2, 
and a pair of dorsal spots on 1. 
Appendages reddish, slender, acute, slightly longer than 10. 
3 2. Pterostigma 2°25-2'5 mm. long, usually surmounting two cells and parts of two others ; 23-26 post- 
cubitals on the front wings. Antenodal cells on the front wings 3 (81°25°/, 5, 83:3°/, 9), 3+ 
(125 J, 3), 2+(6:25 /, dF, 83%/o Y), or 2 (83 %/o Q); on the hind wings 2(31-25°/, 3, 66-6%/, 2), 
3 (625%, 3, 25%» Q), oF 2+ (6:25°/, 3,83, 2). Wings ceasing to be petioled at the submedian 
vein, @ little in front of the level of the quadrilateral. 
Dimensions.—See table ante. 
Hab. Guatemata, Sabo [16], Panima (26, 192], and San Gerdnimo [5¢, 52, 
two of these pairs in copuld], all in Vera Paz, 3000-4000 feet (Champion). 
The individuals from Panima, although apparently not so aged as the others—to 
judge from the brightness of their colours,—have a brown stripe covering almost the 
entire mesepimeron, and the antehumeral bands in the male are brown, instead of red. 
This species seems to be very closely allied to H. equatoriale, Selys, from Colombia and 
Ecuador, to judge from his description. It differs in its larger size and in the greater 
number of antenodal cells. H. eguatoriale is stated to have two antenodal cells, and its 
dimensions are given as: abdomen, ¢ 42-48, 9 29-32; hind wing, ¢ 24-26, 9 22-24 mm. 
2. Heteragrion majus. (Tab. V. fig. 6.) 
Heteragrion majus, Selys, Mém. Couron. Acad. Belg. xxxviii. p. 62 (1886) ’. 
Hab. Panama, Chiriqui! (Staudinger, M. C. Z.: 16). 
In this species there is a mid-dorsal yellow line, extending from the transverse basal 
yellow ring to five-sixths the length of segments 3-5, which I do not find on any males 
of H. tricellulare or of H. chrysops. 
3. Heteragrion chrysops. (Tab. V. fig. 7.) 
 Heteragrion chrysops, Hagen, in Selys, Bull. Acad. Belg. (2) xiv. p. 23 (1862)?; Selys, Mém. 
Couron. Acad. Belg. xxxviil. p. 62 (1886) ?. 
