THE SUBFAMILY LIBELLULIN^. 331 



giving the abdoinen a tessellated appearance ; segment 7 is black above, with a narrow 

 yellow line on each side, 8 and 9 are black, with a transverse yellow line on each side 

 at the extremity ; and the anal appendages are dull reddish, the lateral parts being 

 black. Beneath, the abdomen is black, with an irregular and deeply excavated yellow 

 blotch at the base of each segment, and a yellow dot on each side at the extremity. 

 Legs black, the four front coxae and the front femora beneath yellow. Wings hyaline, 

 with reddish nervures, both the antenodal costal spaces on all the wings, and the base 

 as far as the triangle inclusive on the fore wings, and considerably further on the hind 

 wings deeply tinged with yellow, a smoky cloud runs across each wing just before 

 the pterostigma, which is yellow, banded by black nervures. Accessory membrane 

 white, bordered with black nervures. 

 Hob. Sandwich Islands. 



Ephidatia amazonica. 



Long. Corp. 36 millim. ; exp. al. 60 millim. ; long. pter. 2^ millim. 



Male. — Head violet, purple above, rufous beneath, the nasus and rhinarium black. 

 Prothorax violet-blue above ; mesothorax blue-black ; pleura rufous, with three more 

 or less extended greenish-blue stripes. Legs blackish. Abdomen blue-black, the 

 under surface and sides of the fii'st two segments rufous, this colour extending in one 

 specimen to the lateral carinse of the two following segments. Wings hyaline, with 

 brown nervures ; fore wings with 7 antenodal and 5 postnodal nervures ; hind wings 

 marked with smoky yellow at the base, but scarcely further than just beyond the cross 

 nervure in the lower basal cell ; pterostigma rather short, hardly more than covering one 

 cell, reddish, between black nervures. Anal appendages injured ; upper anal appendages 

 as long as the last two segments, bending downwards, and then recurved at tip. 



Hah. Santarem ; another specimen, rather smaller, from Para. 



Allied to E. loiujipes. Hag., which is in the British Museum, from Colombia ; still 

 nearer, according to Scudder's description, to E. cuhensis, in which, however, a lateral 

 fuscous band extends the whole length of the abdomen, and the costal nervures are 

 more numerous. 



Untamo apicalis. (Plate LIII. fig. 4.) 



Long. corp. 33 millim. ; exp. al. 60 millim. ; long. pter. 3 millim. 



Female. — Yellowish testaceous ; the central and humeral sutures of the thorax and 

 the sutures and carinas of the abdomen black, the dorsal carina broadly black, and a 

 broadening black lateral stripe coalescing with the dorsal and lateral carinee on the 

 apical segments, which are almost entirely black; anal appendages yellow. Legs 

 reddish, the femora more or less blackish above. Wings yellowish hyaline; the 

 pterostigma reddish, all the tips with a deep smoky-brown patch extending nearly 

 to the middle of the pterostigma. 



Hab. Sula. 



3b2 



