148 Annals of the Carnegie Museum. 



black stripe on the second lateral thoracic suture wider and complete. 

 In tinctipennis 9, in addition, the mid-dorsal blue on abdominal seg- 

 ments 3 and 4 is a mere fine line, while in chapadce $ it forms a stripe 

 of some width. The wings of the present material of chapadce. are 

 only very slightly yellowish, or smoky, but this may be only an age- 

 difference, as de Selys accepts it as such in his description of tincti- 

 pennis. 



59. Argia botacudo sp. nov. 

 (Plate IV, Figs. 63, 77, 775.) 



(j\ Rear of the head black, a narrow yellow stripe along each eye- 

 margin. Pale antehumeral stripe at mid-height two-fifths as wide as 

 the black mid-dorsal. Black humeral stripe of subuniform width, one 

 and one-half times as wide as the pale antehumeral, not forked, but 

 enclosing a very small pale spot at its upper end. A black stripe on 

 the entire length of the second lateral thoracic suture. Abdominal 

 segment 2 violaceous, a longitudinal black stripe on each side from end 

 to end, approaching, but not meeting, its fellow of the opposite side 

 on the dorsum a little in front of the hind end of the segment, the 

 violaceous area on the anterior dorsal part of the segment half to three- 

 fifths as wide as the segment itself, the lateral black stripe reaching 

 down to the inferior margin at mid-length of the segment and again 

 at the hind end, or for most of the posterior part of the segment. 

 Abdominal segments 3 and 4 chiefly violaceous in dorsal view, each 

 having a lateral black stripe on each side beginning just behind the usual 

 transverse pale basal ring and widening on the hindmost fourth to 

 sixth of the segments to meet its fellow of the opposite side on the 

 dorsum ; segment 5 similar, but since the lateral black stripes meet on 

 the hindmost third or fourth of the segment, and the mid-dorsal vio- 

 laceous is narrower and tapers to a more acute point posteriorly, black 

 predominates on this segment in dorsal view ; 6 and 7 black with a 

 narrower transverse pale basal ring ; inferior lateral margins of 3-6 or 

 7 pale yellowish, or brownish, except in the hindmost fifth of each seg- 

 ment ; 8-10 violaceous, with an inferior black stripe each side as long 

 as the segments, and apparently reaching farther up toward the dorsum 

 at the hind end of 8 than at any other point. 



$. Differs from the male as follows : Nasus black with a small pale 

 spot on each side ; the black of the frons extends to the nasus in one 

 specimen only (in the males the nasus is blue, the fronto-nasal suture, 

 the rhinarium, and the base of the labrum are narrowly black); pale 





