Calvert : T)donata of the Neotropical Region. 207 



reaching to the level of the hind end of n (anal tubercle); femora 

 brown superiorly. 



In females, which appear to be older, the labrum is black, with only- 

 its extreme free margin pale ; the postocular spots are indistinct, and 

 the pale narrow antehumeral stripes have disappeared. 



9 (heterochromatic a). Upper surface of head and of thorax dull 

 yellowish, with here and there some reddish tinge, especially on the 

 thoracic dorsum ; the following black : a narrow stripe along the base 

 of the labrum ; a marginal stripe on the nasus, which almost completely 

 surrounds the yellowish disk, except at the middle of the anterior 

 border ; a transverse stripe from eye to eye immediately behind the 

 antennae and enclosing the anterior (median) ocellus and three yel- 

 lowish or orange points, one in front and one on each side of the 

 ocellus ; a second more sinuous transverse stripe from eye to eye just 

 behind the two lateral ocelli ; hind surface of the second joint and all 

 of the remaining distal joints of the antennae ; a short line on the 

 upper ends of the humeral and of the second lateral thoracic sutures. 

 The circular blue postocular spots confluent with the pale color of the 

 rear of the head. Apparently a pale green antehumeral line on the 

 reddish-yellow thorax. Abdomen as in the homceochromatic female. 



9 (heterochromatic/^). Like heterochromatic a, but the dorsum of 

 abdominal segment 9 is black, 10 being either black or pale above ; in 

 one example there is a posterior brown border to the blue postocular 

 spots. 



9 (heterochromatic c). The two transverse stripes on the top of the 

 head fused, leaving only yellowish dots or short lines between them (J. e. , 

 between the median and the lateral ocelli); a brown posterior border 

 to the blue postocular spots; a black stripe on each side of the mid- 

 dorsal thoracic carina (which is reddish) half as wide as the mesepi- 

 sternum on which it lies ; an isolated black streak on the mesepimeron 

 close to the humeral suture. (Nearly all the abdomen is lost.) 



c?9. Anal vein ( = inferior sector of the triangle of de Selys) sep- 

 arating from the hind margin proximal to the cubito-anal cross-vein 

 (= postcostal nervule of de Selys) on the front wings by as much (25 

 percent. c5\ 37 percent. 9 ), or by less than as much (75 percent. d\ 

 58 per cent. 9), as the length of the cross-vein itself; on the hind 

 wings separating from the hind margin proximal to the cross-vein by 

 less than the latter's length (17 per cent. d\ 25 per cent. 9), or at 

 the cross-vein itself (83 per cent. (j\ 75 per cent. 9). 



