Vol. XXviii] ENTOMOLOGICAL NEWS. 117 



Posidippus citrifolius (Linnaeus). 



1758. [Gryllus (Tcttinonia)] citrifolius Linnaeus, Syst. Nat., ed. X, p. 



429. ["Indiis."] 

 1869. Stcirodon dcntifcrum Walker, Catal. Dermapt. Brit. Mus., II, 



P- 39 1 - [Unknown locality.] 



Bogota, Colombia. Two females. [U. S. N. M.] 



Chanchomayo, Peru. One male, one female. [A. N. S. P.] 



Contamano, Rio Ucayali, Peru. X to XII, 1912. Two males. 

 [A. N. S. P.] 



Porto Velho, Rio Madeira, Brazil. (Mann and Baker; M. 

 Bolton.) Two males. [A. N. S. P.] 



Rio Una, forty-six miles south of Bahia, Brazil. (A. de La- 

 cerda.) One male. [M. C. Z.] 



Piracicaba, Sao Paulo, Brazil. Three females. [Hebard 

 On.] 



This specific name has been variously considered to belong 

 to members of three genera, i. e. Stcirodon, Peucestes and Pos- 

 idippus, but all question of the proper association of it should 

 be set at rest by Stal's examination of the Linnean material. 

 Regardless of the Roesel figure, quoted by Linnaeus, which 

 clearly represents a species of Peucestes, the testimony of Lin- 

 naeus' material, which belongs to Posidippus, as here under- 

 stood, is the measure of proof. The synonymy of dentiferum 

 is given on the authority of Kirby, who examined the Walk- 

 erian material and so associated it. 



The material now before us shows the species has some 

 variation in the exact form of the free margin of the stridu- 

 lating field of the tegmina of the male and, as usual in the 

 group, in the exact number of the lateral marginal dentations 

 on the pronotum. There is also an appreciable, though slight, 

 amount of variation in the compression of the lateral pronotal 

 carinae. This latter feature is correlated with the degree of 

 concavity of the cephalic margin of the disk of the same. 

 These variations appear to be almost entirely individual. 



The species is now known to range from the region of Bo- 

 gota to Surinam and eastern Brazil, south to eastern and cen- 

 tral Peru. 



