1895. PROCEEDINGS OF THE NATIONAL MUSEUM. 109 



Of all the species here referred to Orodesmus, the present seems to 

 be most nearly related to the West African genus OxydesmuH^ and more 

 especially to Oxydesmus togoennis, an undescribed form differing from 

 the other West African species in the greater jaroportional width and 

 the tendency toward enlargement manifested by the tubercles of the 

 anterior segments. The coloration is also similar to that of 0. fischeri. 

 The specimen belongs to the Berlin Museum. 



ORODESMUS EFFULGENS ( Karsch). 



(PI. V, tig. 1.) 

 Fohjdesmus (Oxydesmus) effulgens, Karsch, Troschel's Archiv, 1881, pp. 36, 46. 



Vertex strongly rugose. 



First segment anteriorly rounded. Segments having the appearance 

 above of transverse oblong rectangles convex in the middle, each 

 marked with three transverse rows of eight subquadrate areas, each 

 armed with a tubercle in the middle; tubercles of the anterior and 

 middle rows (located somewhat behind the middle) rounded, those of 

 the posterior row tooth-like, directed caudad, situated on the posterior 

 margin of the segments. 



Lateral carinaB wing-like, armed in the middle with a low tubercle. 



Last segment armed with up to four lateral denticules. 



Color black or fuscous-brown, the caringe and four median areas of 

 the middle row yellow. 



Length, about 33 mm. 



Locality. — Maid, Somali Land, East Africa, altitude 2,000 feet. Spec- 

 imens of both sexes collected by Hildebrandt and preserved in the 

 Berlin Museum. 



EXPLANATION OF PLATES. 

 Plate II. 



Aslrodesmus stellifer. 



Fig. 1. Tliird leg of male. 



2. Thirteenth leg of male. 



3. Thirty-first leg of male. 

 4-7. Views of male geuitalium. 



8. Male genitalia in situ; also the ventral part of the sixth segment. 



9. Male genitalium, side view, drawn from a specimen in the British Mnsenm. 



10. Anterior view of the sternum of the sixth segment, showing the i)eculiar 



median process and two basal joints of the legs. 



11. Posterior view of the process mentioned. 



Aulodesmus laxus, 



12. Genitalium, median view, after Karsch. 



13. Same, lateral view, after Karsch. 



