Calvert: Odonata of the Neotropical Region. 157 



wings with 9-12 postnodals (10, 40 per cent, and 11, 35 per cent., 

 more frequently), M 2 (= nodal sector of de Selys) arising nearest the 

 fifth (80 per cent.) or sixth (10 per cent.) postnodal, or midway 

 between (10 per cent.); two (90 per cent.) or three (10 percent.) 

 antenodal ultraquadrilateral cells. Hind wings with 7-10 postnodals 

 (11, 55 per cent, most frequently); M 2 arising nearest the fifth (45 

 per cent.), fourth (40 per cent.), or midway between (10 per cent.), 

 or in one wing (=5 per cent.) nearest the sixth postnodal ; two (95 

 per cent.) or three (5 per cent.) antenodal ultraquadrilateral cells. 

 All percentages based on 9 ? cT 1 $ . 



Dimensions. Abdomen tf 16.5-20, $ 18.5; hind wing c? 11. 5 

 -13.5, ? 14.5. 



Habitat : — Brazil, Chapada, by H. H. Smith, 8 S 1 c? and parts of 

 2 other specimens, some labeled 145, one 77, by the collector. Car- 

 negie Museum, Pittsburgh. 



64. Leptagrion porrectum ? 



Leptagrion porrectum Selys, Bull. Acad. Belg. (2) xlii, p. 975. 1876. 



L. porrectum Selys was described "d'apresun exemplaire ' from 

 Brazil. The description is in one place, 17 at least, obscure. A male 

 from Rio de Janeiro, in November, by H. H. Smith (Carnegie Mu- 

 seum, Pittsburgh), resembles that description in many respects, but 

 differs in others, so that I am uncertain whether it pertains to the same 

 species or not. The differences are : the longer abdomen 64 mm. 

 (instead of 54), 13 postnodals on the front wing (instead of 14-15), 

 upper surface of the head blue, but with a transverse blackish band .5 

 mm. wide from eye to eye, the median ocellus and the bases of the 

 antennae being respectively on the upper and lower margins of this 

 dark band, the first antennal joint having a blue spot anteriorly ; hind 

 prothoracic lobe blue, with a reddish spot in the middle ; neitherthe mid- 

 dorsal thoracic carina nor a " juxta-humeral " ray black, only a short 

 black line at the upper ends of the humeral and of the second lateral 

 sutures ; a blue antehumeral stripe bordering the humeral suture ante- 

 riorly, one-third as wide as the reddish mid-dorsal ; abdomen pale 

 ochre-brown, sides of 1 and 2 pale green, extreme base and an anteter- 

 minal transverse band of about 1 mm. in width on 3-6 blackish or 

 dark brown, on 3 and 4 this anteterminal band is distinctly separated 

 from the hind end of the segments by a narrower pale ochre ring ; 7 



17 L. c, p. 976, lines 25-27. 



