84 Annals of the Carnegie Museum. 



nodals. Hind wings with 3-5 cross-veins in the basal median area 

 and in the quadrilateral. 



Abdomen <$ 31-32, 9 27-28 ; hind wing cP 22-24, ? 2 3 -2 5 mm - 



Habitat. — Brazil: Chapada, in May, by H. H. Smith, 2 cT and 

 parts of six others, 2 9 and parts of six others. Carnegie Museum, 

 Pittsburgh. 



This species differs from all other known species of the genus, except 

 H. borchgravii, by the entire absence of red on the wings of the male. 

 The brown on these organs recalls Hetcerina titia Drury, of the 

 extreme southern United States, Mexico, and Central America, but in 

 that species it has been shown, 5 that, while brown first appears on the 

 wings of the teneral individuals, subsequently red is indicated by a 

 pale pink wash over the brown at the base of the front wings. This 

 pink becomes a deeper and deeper red, while the brown is at the same 

 time darkening. No trace of red is apparent in any of the present 

 material of Hetcerina fuscibasis, although different ages are repre- 

 sented. If the ontogenetic order of the colors on the wings of 

 Hetcerina males, as described for H. titia, H. capitalis 6 and H. 

 tolteca? has a phylogenetic significance, then Hetcerina fuscibasis has 

 some claim to be regarded as representing an original, partly brown- 

 winged form, from which the majority of present-day Hetserinae, with 

 their red-based wings, have sprung. 



It will also be noticed that the considerable variation in the num- 

 ber of rows of cells in the second cubital area of the hind wings of the 

 male seriously invalidates the grouping of the species of this genus 

 proposed in the work just cited. 8 



6. Hetaerina rosea Selys. 



Habitat. — Brazil: Chapada, by H. H. Smith, 7 $ and parts of 8 

 others, No. 182; parts of 21 9> Nos. 46, 182. Carnegie Museum, 

 Pittsburgh. 



7. Hetaerina caja Drury. 



Calvert, Biologia Centrali- Americana, Neuroptera, pp. 21, ^^, 1901. 



Habitat. — Colombia: Bonda in Dept. Magdalena, by H. H. 

 Smith, August, 2 tf. Carnegie Museum, Pittsburgh. 



5 Calvert, Biol. Centr.-Amer. Neuropt., p. 32, 1901. 



6 Calvert, ibid., p. 347, 1907. 

 'Ibid., p.' 348. 



* Ibid., pp. 20-22, 342-343. 



