Calvert : Odonata of the Neotropical Region. 151 



Habitat: — Brazil, Chapada, by H. H. Smith, 4 d\ one dated 

 May. Carnegie Museum, Pittsburgh. 



The specific name proposed is that of a native human tribe. 

 » This species belongs to the same group as the Mexican and Central 

 American speciesliar&nessi, fiarretti, pipila, and chelataoi the "Biologia 

 Centrali- Americana," Volume Neuroptera, and in the key to the species 

 therein (/. c. pp. 71, 359) comes nearest to chelata. It differs from 

 chelata in its smaller size, fewer antenodal cells on the front wings, in 

 the details of the abdominal appendages, the smaller extent of pale 

 color (here violet) on the abdomen, the black humeral stripe forked 

 in its upper two-thirds, the mesepimeral constituent of the fork reach- 

 ing to the upper margin of the mesepimeron, which is not the case in 

 chelata. 



Among the described South American species, /////seems to approach 

 claussenii Selys and croceipennis Selys. From the description of the 

 first it appears to differ by the absence in all four examples of any 

 double cells in the second cubital area ( = espace postcostal of de 

 Selys), in having fewer black bands on the thorax, and less pale color 

 on the abdomen, especially on segment 7 ; the details of the abdominal 

 appendages are also different from Hagen's figures of those of claussenii. 

 (Bull. Mus. Comp. Zool. XXXIX, 1902.) 



The description of croceipennis calls for an insect having, inter alia, 

 its wings " entierement lavees de jaunatre safrane, . . . devant du 

 thorax noir, avec une bande antehumerale bleue arquee [which I 

 interpret to mean that black predominates on this area]. . . . Ab- 

 domen noir luisant, marque de bleu ainsi qu'il suit : . . . 7me-8me 

 a anneau basal non prolonge, " which characteristics appear to exclude 

 the form here described as new. 



61. Argia subapicalis sp. nov. 



(Plate IV, figs. 79, 79-r. ) 

 cT. Rear of the head black, a pale stripe bordering the eyes below ; 

 one c? shows also a superior transverse yellowish stripe similar to that 

 described for A. tupi. Black mid-dorsal thoracic stripe reduced to a 

 line upon the carina only. Black humeral stripe little more than a 

 line for most of its length, slightly wider in its upper half, especially 

 just below its upper end, at its lower end confluent with a sub- 

 quadrangular mesepimeral black spot, similar to, but wider than 

 the spot in the same area in A. apicalis Say of North America, 



