MORGAX HEBARD 163 



ill the usual superficial manner, but sufficient characters are given 

 to show that the majority, to varying degrees, violate even the 

 very brief and unsatisfactory generic description. No genotype 

 was selected. We here select as genotype, Ocnophila integra 

 Brunner, the only species of which figures were given. 



LIBETHRA St&l 

 ls7.5. Cnulonia St&l, Recens. Orth., iii, p. 74. 

 1S7.5. Lihelhra Stil, ibid., iii, p. 74. 



Kirby's genotypic designation for Caulonia StaP^ is invalid, 

 being based on a species not originally included in that genus by 

 Stal. We here select Ceroys rabdota Westwood as genotype of 

 Caulonia Stal. 



Brunner's designation of a genotype for Libethra is invalid, ^^ 

 being antedated by Kirby's designation of Libethra nisseri Stal.^" 



It is almost certain that rabdota and nisseri are congeneric, and 

 in consequence Libethra would fall as a synonym of Caidonia, the 

 latter description having line priority, ^^ except for the fact that 

 Caidonia is preoccupied, Loriol, in 1873, having used this name for 

 a genus of Echinoderms. 



Study of the literature and the material now at hand convinces 

 us that a host of species of the genus occur in Colombia. The 

 variously specialized forms are eas'ly separated, association of the 

 sexes alone proving difficult for some in which the males almost 

 or altogether lack the most distinctive features exhibited by the 

 females. 



The least specialized forms are, however, difficult in the ex- 

 treme, at least in the state of our present knowledge. From 

 the series at hand it is clear that in the same species both green 

 and brown color forms occur, and that, in the brown condition, 

 the body granvilation and carinulae of the dorsal abdominal seg- 

 ment may be intensified. Size variation is also apparent and the 

 similarity of nearly adult to fully adult material makes careful 

 examination of each individual essential. Large collections, con- 

 taining extensive series of each species, will have to be assembled 

 before the number of such species and the association of the sexes 

 <3an be definitely and conclusively determined. In the material 



8' Syn. Cat. Orth, i, p. 344, (1904). 



89 Insektenfamilic dcr Phasmiden, p. 304, (1908). 



90 Syn. Cat. Orth., i, p. 345, (1904). 



'' Brunner ii.ses Libethra, discarding Caulonia without explanation. 



TR.\XS. AM. ENT. SOC, XLV. 



