Calvert : Odonata of the Neotropical Region. 



115 



that of any other species. The original description of 1862 does not 

 mention a line, at first brown but black in later life, which appears on 

 the outer side of the yellow line bordering each side of the black mid- 

 dorsal thoracic carina. 



Genus Perilestes. 



The presence of one male and of parts of one male and two females 



from Chapada, by H. H. Smith, in the Carnegie Museum collection, 



and referable to this genus, has resulted in drawing up the following 



comparisons. 



Males. 



P. fragilis ? Hagen P. comuta 12 Selys, " P. fragilis ? ' ' 





(Chapada 2 $ as 



Mem. Couron. 



of Biol. Centr.-Amer. 





above). (Plate 3, 



Acad. Belg. 



Neurop.ip. 409. 1908. 





%s. 44, 45, Plate 



xxxviii, p. 68. 



(1 $ Surubres in 





8, fig. 140.) 



886. (Selys' 



Costa Rica). (Plate 



Vein M la (= ultra- 





description. ) 



IV., fig. 64. )\ 



nodal sector of 









de Selys) begin- 





* 





ing 



Under, or at the 



3-4 cells proximal 



1-2 cells proximal 





level of the dis- 



to the level of 



to the level of the 





tal edge of the 



the stigma 



stigma. 





stigma. 







Postnodals, front 









wing 



11-12 



14-15 



13 



Labrum 



pale blue 



black 



pale brown 



Nasus 



pale blue, black at 

 base 



brown 



pale brown. 



Abdominal seg- 



metallic-green, a 



chiefly yellow 0- 



(like comuta) 



ment 2 



mid-dorsal line 



chre with a dorsal 







and sides infe- 



black band 







riorly yellow 







Abdominal seg- 



no ante-apical yel- 



a broad basal and 



(like comuta) 



ments 3-6 with 



low ring, but 



an anteapical yel- 







with a narrow 



low ring 







basal yellow ring 



1 





Superior append- 



at one-third length 



basal half strongly 



(damaged and distor- 



ages, in dorsal 



a lamellate ob- 



dilated, flattened, 



ted, more like cor- 



view, having 



liquely truncated 



this dilation end- 



nuta) 





tooth directed 



ing suddenly at a 







caudad, not form- 



right angle, the 





■ 



ing a right angle 



angle prolonged 







with the append - 



inferiorly as an 





12 By analogy with Lestes, this name should be comutits. 



