CERAMBYCIDAE. 



137 



Upolu ; peculiar to Tutuila are Olethrius subnitidus, Prosoplus ventralis, Oopsis 

 obtusipennis and Sciadella minuta. 



It seems evident that Savaii, the largest island in the group, has been less 

 well explored than Upolu or Tutuila. [This is certainly the case. — P. A. 

 Buxton.] 



The species of Cerambycidae known from Samoa are as follows : — • 



Prioninae. 



1. Olethrius insularis Fairm. 



Mallodon insularis Fairmaire, Rev. Zool. (2), 2, p. 57, (2) 1, t. 11, f. 14, 1850 ; Olethrius insularis 

 Lameere, Ann. Soc. Ent. Belg., 47, p. 133, 1903 ; Revis. Prion., p. 175, 1903 ; Olethrius 

 insularis Auriv., Denkschr. K. Akad. Wiss. Wien, Math.-Naturw. Kl., 89, p. 691, 1913. 



Upolu : two females, Apia, viii. and 21.X.1924 ; two other females, 

 Malololelei, 2000 ft., iv.1924, 17.iv.1925. 



The third joint of the antennae is not or hardly twice as long as the second, 

 and has on the under side near the apex a distinct and well defined sensory 

 surface composed of two or three shallow, dull furrows ; first joint more or 

 less curved on the inner side. Elytra dull, not glossy, densely vermiculate and 

 rugulose, especially before the middle. 



2. Olethrius subnitidus, sp. n. 



Nigro- vel castaneo-brunneus. Caput paulo latius quam longius, 

 supra fortiter rugulosum, grosse punctulatum, inter oculos depressum et 

 longitudinaliter sulcatum. Antennae ultra elytrorum medium attingentes, 

 articulo 1° recto, obconico, supra longitudinaliter sulcato, punctato, punctis 

 lateraliter confertioribus, articulo 3° nitido, parce punctato, secundo duplo 

 longiori, area sensili indistincta, articulis duobus ultimis per longitudinem 

 totam striatis. Prothorax transversus, basi elytrorum latitudinem aequans, 

 antrorsum angustatus, lateribus fere rectis, denticulatis, angulis posticis paulo 

 productis, disco ad latera fortiter ruguloso, medio nitido, punctato, tumoribus 

 duobus parce punctatis instructo. Scutellum magnum, late rotundatum, 

 pilis brevibus recumbentibus omnino vestitum. Elytra nuda, nitidiuscula, 

 coriacea, punctis nonnullis parvis, apicibus late rotundatis, angulo suturali 

 acuto, costis vix perspicuis. Pedum anticorum femora et tibiae scabra, 

 fortiter punctata et rugosa, nec denticulata nec spinosa. Metasterni latera et 



