190 Annals of the Carnegie Museum. 



locality. The absence of black dots on the thoracic dorsum, which 

 has suggested the specific name impunctatum, renders this species easy 

 to distinguish from O. basale. 



It is worthy of note that in O. impunctatum as in O. basale, speci- 

 mens from Sapucay tend to larger size and greater number of post- 

 nodals than in those from Chapada. 



Genus Telebasis. 



Group of T. corallina. 



(The present material contains a number of forms closely related to 



T. corallina (Selys). It seems convenient to first give the common 



characters of these species, and then to limit the description of each 



form to those features in which it differs from its allies.) 



Rear of the head pale, abdomen red, each mesepisternum with a dark metallic-green 

 stripe contiguotis to mid-dorsal carina. 



1. Superior appendages of the male longer than the tenth abdominal segment, 

 inferior appendages distinctly shorter than the superiors, dorsum of abdominal 

 segments I and 2 at least not distinctly blackish; upper surface of the head 

 dark metallic-green, with an oblique redline or streak between each lateral 

 ocellus and the antenna of the same side, and a transverse reddish line or stripe 

 bordering the postero-superior dorsal margin of the occiput. 



corallina (Selys), carmesina n. sp., sanguinalis n. sp. 



2. Superior appendages of the male as long as the tenth abdominal segment, in- 

 ferior appendages subequal in length to the superiors, dorsum of abdominal 

 segment I and of the anterior half of 2 blackish or blackish-brown ; upper 

 surface of the head dark metallic-green, its markings as indicated below. 



coccinata n. sp., carminita n. sp., coccinea (Selys) 



95. Telebasis corallina Selys. 



(Plate V, fig. 99.) 



Erythragrion corallinum Selys, Bull. Acad. Belg. (2) xlii, p. 964. 1876. 

 Telebasis corallina Kirby, Cat. Odon., p. 155. 1890. 



d\ Transverse reddish occipital stripe terminating on each side in 

 a larger reddish spot. 



Labrum bluish-green (" levres jaunatres " Selys). 



Prothorax entirely reddish. 



Mid-dorsal thoracic carina reddish, the dark metallic-green stripe on 

 each side of the carina one-third as wide as the mesepisternum on 

 which it lies, remainder of mesepisterna and mesepimera reddish, 

 metapleura greenish-yellow. 



Superior appendages, in profile view, with the upper margin strongly 



