Calvert : Odonata of the Neotropical Region. 103 



amples, the dark color extending farther down on the anterior and 

 posterior margins than on the disk ; a black anterior metepimeral stripe 

 uniting with its fellow of the opposite side on the mid-ventral line ; 

 a black metasternal stripe, 1.25 mm. long, parallel to and almost con- 

 tiguous with each latero-ventral carina, reaching farther forward and 

 backward than the level of the hind end of the black metepimeral stripe, 

 but not confluent with it. Mid-ventral thoracic groove blackish, es- 

 pecially between the bases of the legs, and a small elongated black 

 metasternal spot on each side of its hind end. 



Dorsum of abdominal segments 1-7 bronzy brown ; basal dorsal 

 portion of 1, a fine mid-dorsal longitudinal line on 2-4, a narrow trans- 

 verse basal ring on 3-7 (usually interrupted mid-dorsally), a similar 

 narrower apical ring on 3-6, sides of 1-6 or 7 inferiorly (except on the 

 posterior sixth of 3-6) yellowish. Dorsum of 8-10 obscure, sides paler. 

 Segment 7 different from all the others in having a coat of pale hairs 

 reaching from one-fourth to five-sixths of tne length of the segment, 

 chiefly on the dorsal side, the hairs being one-third to one-half as long 

 as the segment is thick. 



Superior abdominal appendages twice as long as 10, longer than 9, 

 not as long as 8, straight in the proximal half or three-fifths, curved 

 toward each other and overlapping in the remaining half or two-fifths. 

 In dorsal view there is on the inner edge a large blunt triangular tooth oc- 

 cupying the proximal half of the appendage, proximal edge of the tooth 

 a little shorter than the distal edge, the latter terminating in a small 

 prominence, which at its hind end forms almost a right angle with the 

 appendage ; the remainder of the appendage at first slender, then en- 

 larging slightly, denticulated externally, and terminating in a rounded 

 somewhat hairy apex. In profile view the upper margin in the prox- 

 imal three-fifths is almost straight, distal two-fifths bent downward, 

 tooth of the basal half forming a pronounced inferior convexity followed 

 by a tubercle with very little interval between ; at about four-fifths the 

 appendage-length is an elongated inferior tubercle. 



Inferior appendages about one-third as long as the superiors, reach- 

 ing to slightly beyond the level of the apex of their basal tooth, abruptly 

 narrowed on the inner edge at half their own length, basal half three 

 to four times wider than the apical half, which latter is inclined toward 

 its fellow of the opposite side, but not enlarged at tip. In profile view 

 the inferiors taper rapidly to half their length, apical half very slender, 

 straight. 



