210 



INSECTS OF SAMOA. 



In the case of each genus, with the exception of Megistops, Dibolia and 

 Argopistes, I have examined the genotype. With regard to Megistops and 

 Dibolia I have examined specimens determined by Baly, and have accepted 

 Ogloblin's determination of Argopistes biplagiata Motschulsky. The genus 

 Argopistoides Jacoby (Ann. Mus. Civ. Genova, xxxii, p. 931, 1892) should have 

 been included in the present study, but I have no means of examining the geno- 

 type, in which, according to Jacoby, the posterior tibia is deeply sulcate in the 

 apical portion and armed with a robust double-pointed spur. 



This study of the tibial characters is not exhaustive, but sufficient to show 

 beyond doubt the relationship of the Samoan species, and incidentally it indicates 

 a line of research which could be pursued in order to show the variety of structure 

 in correlation with the jumping habit of Halticinae. 



In the above table the characters presented by the hind tibia and tarsus, 

 etc., are stated in a comparative manner, and, by means of them alone, it is not 

 intended here to establish relationships among the genera dealt with. 



HlSPINAE. 



16. Promecotheca reichei Baly. 



Promecotheca reichei Baly, Trans. Ent. Soc. Lond., p. 374, 1869. 

 Promecotheca lindingeri Aulmann, Entom. Rundschau, xxxi, pp. 27, 28, 1914. 



Upolu : Mulifanua, 16.vii.1925, 5 examples ; 17.vii.1925, 2 examples 

 (Wilder). 



Tutuila : Pago Pago, 3,000 ft., iv.1918, 1 example (Kellers) ; 1,000 ft., 1 

 example (Kellers). 



[During 1924, 1925, we looked carefully for this species in many parts of 

 Samoa ; the only specimens we found were on a coconut-palm at Mulifanua, 

 Upolu, in November, 1925. This is remarkable, since Aulmann has recorded 

 it as a pest, though he gave no details. — P. A. B.] 



It may be recorded here that an example from the Deutsches Entomo- 

 logisches Museum, Berlin, sent to me by Dr. Walther Horn, is from Savaii. 

 Although the specimen is not perfect, I do not hesitate to identify it as P. reichei 

 Baly. Specimens are known from Tonga, Fiji, and elsewhere. 



Distribution of the Genus. — The genus Promecotheca, first described in 1853, 

 by Blanchard, from a specimen taken in Tonga, has representative species in 

 Fiji, New Hebrides, Solomon Is., New Pomerania, New Guinea, North Australia, 



