187 



In one of the two maps appended to my paper on Colobathristidse 

 (Ann. Soc. Ent. Belg. 1910, pp. 297-305) one species is marked as 

 inhabiting the island Hainan which on that map is wrongly called 

 Formosa. The species in question reaily occurs in Formosa, north 

 of the Philippine Islands. The mistake was due to an accidentai 

 confounding of Taiwan (Formosa) with Hainan. 



SYNON YMICAL NOTES 



REDUVIID/E 



1. Stâl united his Alcynena angusta from Geylon with Cimex spi- 

 nifex Thunb. after having examined the type of the latter. Distant, 

 who had Thunberg's type on loan, claims to hâve « cleared up some 

 confusion » by stating that Stâl had made « a mistake » in the 

 above synonymy, and that spinifex is even generically distinct from 

 angusta because it bas two small spines or tubercles on the anterior 

 pronotal lobe. He therefore founded the new genus Bartacus on spi- 

 nifex. However, Stâl (Enum. Hem. IV, p. 9) correctly stated : 

 « lobo antico pronoti posterius sœpe bispinoso vel tuberculis duobus 

 acutis armato », thèse spines or tubercles being in fact in this genus 

 more or less distinctiy developed in some spécimens whereas they 

 are totally missing in other spécimens of the same species. This 

 inconstancy in the development of the pronotal discal spines occurs 

 also in some other gênera, for instance Ischnolestes Stâl and Chœta- 

 cantha Bergr. The synonymy as given by Stâl, angusta Stâl = 

 spinifex Thuns., is quite correct, and Bartacus Dist. is a synonym 

 o( Alcniena Stâl. 



2. Distant's description (Rhynch. Brit. Ind. II, p. 202) of the 

 Ceylonese Ploeariola oculata Reut. is only an abbreviated transla- 

 tion of Reuter's diagnose (not of his description), and is not refe- 

 rable to the species he figures under that name which is widely dif- 

 férent from Reuter's species, and for which I propose the name 

 P. Greeni after its discoverer who has studied its behaviour in con- 

 finement. The différences between the two species are given below. 



P. oculata Reut. P. Greeni m. 



(accordingto Distant's figures). 



Head slightly longer than pos- Head shorter than posterior 



terior lobe of pronotum. lobe of pronotum. 



Eyes very large, occupying Eyes not occupying the whole 



the whole height of the head; height of the head; distance 



distance between the inner mar- between the inner margins of 



gins of the eyes only half the the eyes longer than the trans- 



length of the transverse diameter verse diameter of the eye. 

 of the eye. 



