138 



INSECTS OF SAMOA. 



episterna pilis flavidis vestita. Abdomen subtus nudum, nitidum, segmento 

 ventrali ultimo postice fulvo-villoso, medio leviter sinuato. 

 Long, corporis 58-66 mm. ; lat. 21-24 mm. 



$ Antennae ultra elytrorum medium haud attingentes, articulis 6°-ll° 

 striatis, articulo 11° paulo compresso. Pronotum minus punctatum, angulis 

 posticis magis productis. Pedes nitidi, parce punctati, antici haud scabri. 



Long. 62 mm. ; lat. 20. mm. 



Three males and one female, Tutuila (Kellers). 



Nearly allied to the preceding species (0. insularis Fairm.), but differing 

 in having coriaceous subnitid elytra, a longer, straight or nearly straight first 

 antennal joint, and a longer third joint, which is about twice as long as the 

 second joint and has its sensory surface obsolete. From 0. tyr annus Thorns., 

 the present species is easily distinguished by the shorter and stouter third joint 

 of the antennae. In 0. tyrannus, the third joint is three times as long as the 

 second joint. 



Cerambycinae. 

 3. Ceresium maculaticolle Blanch. 



Diatomocephalus maculaticollis Blanchard, Voy. Pole Sud, 4, p. 267, t. 16, fig. 9, 1853. 

 Ceresium maculaticolle Auriv., Denkschr. K. Akad. Wiss. Wien, Math.-Naturw. Klasse, 89, p. 691, 

 1913. 



Two males and twenty-one females, LTpolu : Apia, 23.i.l924, v. 1924, 

 vii.1924 and i.1925 ; Malololelei, 2000 ft., 24, 25.ii.1924, 22.iv.1925 ; Apia, 

 20.viii.1922, lO.x.1922, 13.iv.1924 (Armstrong) ; same locality, 13.ix.1923 

 (Swezey and Wilder). Two females, Pago Pago, Tutuila (Kellers and Steffany). 



The species was also found in Tonga at Manau and Nukualafa, ii., hi. 1925, 

 by G. H. E. Hopkins. 



4. Ceresium unicolor F. 



Saperda unicolor Fabricius, Mant. Ins., 1, p. 147, 1787 ; Saperda unicolor Oliv., Ent., iv, 68, 

 p. 38, t. 3, fig. 28, 1795 ; Saperda unicolor Boisd., Voy. Astrol. Ent., 2, p. 526, 1835 ; 

 Hesperophanes guttaticollis Fairm., Rev. Zool. (2), 2, p. 63, 1850 ; Ceresium unicolor Bates, 

 Ann. Mag. Nat. Hist. (4), 14, p. 131, 1874 ; Ceresium simplex var. Fairm., Ann. Soc. Ent. 

 Fr. (6), 1, p. 472, 1887 ; Ceresium unicolor Auriv., Denkschr. K. Akad. Wiss. Wien, Math. 

 Naturw. Klasse, 89, p. 691, 1913. 



Upolu : ten specimens, Apia, hi., v., vi.1924 (Buxton and Hopkins), 

 10.iv.1923 (Armstrong), 13.ix.1923 (Swezey and Wilder) ; one specimen, Lalo- 

 manu, xi.1924 ; also one specimen, Tutuila, 9.ix.l923 (Swezey and Wilder). 



