152 Annals of the Carnegie Museum. 



and which is continued upon the mesinfraepisternum. A black 

 stripe on the second lateral thoracic suture down to the level 

 of the metastigma. Abdominal segment 2 blue, becoming violet 

 with age, with a black stripe on each side from end to end, widened 

 mesad at about four-fifths' length, so as to approach, but not to meet, 

 its fellow of the opposite side on the dorsum, and again narrowed to 

 the hind end ; 3-7 predominantly black, with a narrow transverse basal 

 pale (violet in older examples) ring, which on 3 is produced backward 

 on the dorsum, tapering posteriorly to four-fifths or two-thirds of the 

 segment's length, and on 4 is similarly produced for the first eighth or 

 tenth of the segment's length ; on the sides of 3-6 or 7 the pale basal 

 ring is produced as a pale stripe along the inferior margin to about 

 five-sixths of the length of each segment ; 8-10 pale (blue?) with an 

 inferior black stripe on each side as long as the segments ; in at least 

 one specimen the black stripe on each side of 8 is produced upon the 

 dorsum at the hind end of the segment, and meets its fellow of the 

 opposite side. 



Stigma of the front wings surmounting more than one (60 per cent.), 

 one (20 per cent.) or less than one (20 per cent.) cell, long; of the 

 hind wings surmounting more than one (50 per cent.), one (40 per 

 cent.), or less than one (10 per cent.) cell. 



Antenodal cells on the front wings 4 (90 per cent.) or 5 (10 per 

 cent.), on the hind wings 4 (80 per cent.) or 5 (20 per cent.). 

 (Percentages in this and in the preceding paragraph based on 5 d\) 



9 unknown. 



Dimensions ; d\ Abdomen 28-31.5 ; hind wing 19-23 mm. 



Habitat: — Brazil, Chapada, by H. H. Smith, 3 cT and parts of 

 2 others. Carnegie Museum, Pittsburgh. 



This species shows a remarkable resemblance to A. apicalis Say of 

 North America, which latter is not known south of Texas. Apicalis 

 differs in the following peculiarities : the rear of the head is chiefly 

 pale ; the black on the upper surface of the head extends no farther 

 forward on the middle line than the median ocellus, and the first anten- 

 nal joint is pale (blue), (in subapicalis the black of the upper surface 

 of the head reaches at least as far forward along the median line as the 

 anterior limit of theantennal bases, and is in some examples produced 

 as far as the fronto-nasal suture, and the first antennal joint is black); 

 there is no black stripe on the second lateral thoracic suture, the mid- 

 dorsal longitudinal pale area on abdominal segment 2 is merely a 



