THE SUBFAMILY LIBELLULIN^. 333 



between the wings is a broader yellow interrupted dorsal stripe, narrowly continued 

 on the dorsal carina of the abdomen for nearly its whole length ; pleura coppery green, 

 a broad oblique yellow stripe beneath the front wings, a short yellow stripe below the 

 base of the hind wings, and a broad yellow horizontal stripe on the metapleura, 

 narrowly continued on as reddish lines on each side of the lateral carinee of the abdomen 

 nearly to the extremity ; there is likewise a pale line on each side of the median line of 

 the abdomen beneath. Legs blackish, femora pale beneath. AVings hyaline, browned 

 at the tips, and with brown pterostigmata ; male with the anal appendages as long as 

 the eighth segment, the lower appendage nearly as long as the others, broad and bifid, 

 or rather crescent-shaped at the extremity. 



Hah. Para. 



A longer and more slender insect than 0. ferruginea, Fabr. The triangle of the 

 fore wings is sometimes on a level with that of the hind wings, and sometimes con- 

 siderably beyond it, even on opposite sides of the same specimen. 



Belonia foliata. (Plate LIV. fig. 4.) 



Long. corp. 45-47 millim. ; exp. al. 85 millim. ; long. pter. 5^ millim. 



Female. — Head and thorax greenish, rhinarium reddish, tips of mandibles black, 

 frontal tubercle raised, broad, bifid. Abdomen reddish, with all the carinas, and the 

 edges of the foliation on the eighth segment, black. Legs reddish ; knees, spines, and 

 tarsi black. Wings yellowish hyaline, more clouded towards the tips, base tinged with 

 yellow, chiefly along the lower costal space and in the lower basal cell; all the 

 nervures blackish, except the outside of the costal nervure at the base, pterostigma 

 reddish brown between black nervures, sectors of the arculus very shortly stalked, 

 triangle long and rather narrow, traversed by two or three nervures, and followed by 

 four rows of cells, one supratriangular nervure ; hind wings with the triangle traversed 

 by one or two nervures, membranule very small, black. 



Eah. Mexico. 



A male from Guatemala, which appears to belong to this species, is much darker 

 (long. corp. 55 millim. ; exp. al. 88 millim. ; long. pter. 7 millim.); it has 17-18 ante- 

 nodal and 14-15 postnodal nervures ; there is no yellow at the base, and there is a 

 supratriangular nervure on the hind wings ; the appendages are short, about as long as 

 the seventh segment, thickened before the extremity, which is slightly raised and 

 pointed ; the lower appendages and those of the second segment are not visible. 



This specimen being in bad condition, 1 have preferred to take a female as typical oi 

 the species. 



Beloxia uxifokmis. 



Long. corp. 49 millim. ; exp. al. 90 millim. ; long. pter. 8 millim. 



Female.— C\o%e\)' allied to JB.foliata, hut almost the entire insect reddish brown, 



