72 



REPORT ON THE CENTIPEDES AND MILLIPEDES OBTAINED BY 



doubt also fall into the genus Spirobolus as now restricted, namely, S. insulanus and 

 S. alhidicollis, Porat (Ann. Soc. Ent. Belg. xxxil., pp. 251-253, 1888), and both are 

 evidently related to S. carneipes and S. caledonicus. The four species, however, seem to 

 be separable by the following features : — 



(a) Segments not transversely banded, usually marked dorsally with a pair of red 



or yellow longitudinal stripes ; legs pale insulanus. 



(b) Segments transversely banded, without longitudinal stripes. 



(«') Segments mostly' smooth and polished, at least not rugose : legs and 

 antennae uniformly black caledonicus. 



(b') Segments coriaceous or rugose. 



(a") Legs and antennae yellowish brown, ringed with black ; first 

 tergite mostly whitish alhidicollis. 



(b") Legs and antennae a uniform reddish pink ; 1st segment not 

 whitish carneipes. 



S. detornatus, Karsch. (Zeits. Naturwiss. 54, p. 57, 1881), from Viti Levu, probably 

 also belongs to this section. If so it will apparently differ from those species enumerated 

 above in having the face divided by a deep sulcus and thickly marked laterally with 

 oblique striae. 



Genus. Trigoniulus. 

 (20) Trigoniulus pulcherrimus, sp. n. 



Colour (in alcohol); dorsum of segments occupied by a broad blood-red band divided 

 in the middle line by a narrow black stripe, sides of the segments occupied by a broad 

 black stripe ; lower portion of segments also blood-red ; first tergite and anal somite 

 black ; lower half of head pale, upper half black ; antennae palely fuscous ; legs entirely 

 pale yellow. 



Head and first tergite smooth ; the rest of the segments with their posterior portion 

 elevated and smooth or nearly smooth dorsally, striate laterally and inferiorly but not more 

 than half-way up to the pore ; the groove separating the anterior and posterior parts 

 of the segments marked dorsally from pore to pore with a series of subcircular im- 

 pressions ; below the pore on each side the groove is impressed with the ends of the 

 striae, which pass backwards on to the anterior portion of the tergites. 



Pore situated upon or perhaps a little behind the groove. Anal tergite forming 

 a blunt obtusely-angled point not surpassing the valves ; valves lightly compressed ; 

 sternite with posterior border transverse. 



Number of segments 46. 



Length 30 mm., width 2'8 mm. 



Loc. New Britain. 



This species is very noticeable for its bright black and blood-red colouring. 



