19221 NATURAL SCIENCES OF PHILADELPHIA 269 



blackish brown dorsad, a row of the same mesacl, while the ventral 

 margin is ornamented with a series of still heavier flecks. 



Length of body 11.2, width of head (including eyes) 5, length of 

 pronotum 3.2, greatest width of pronotum 3.4, length of prono- 

 tal lateral lobe 2.9, depth of pronotal lateral lobe 2.7, length of 

 cephalic femur 3.4, length of caudal femur 12.1, greatest width of 

 caudal femur 3.2, length of ovipositor 6.7 mm. 



The type of this handsome and extraordinary little insect is 

 unique. 



Hexacentrus unicolor Serville. 



1831. Hexacentrus unicolor Serville, Ann. Sci. Nat., XXII, p. 146. [cf, 

 Java.] 



Kolambugan, Mindanao, Philippine Islands, (from C. F. Baker), 



1 9. 



Zamboanga, Mindanao, Philippine Islands, (from C. F. Baker), 



1 9. 



Labuan, British North Borneo, 2 d\ 7 9 • 



Borneo, (from and determined by Saussure), 1 9 , [A. N. S. P.] 



Obi Island, Moluccas, 1 d\ 3 9 . 



Batu Sangkar, Padangische Bovenland, Sumatra, August and 

 September, 1901, (Harrison and Hiller), 1 9 , [A. N. S. P.] 



Java, (from and determined by Saussure), 1 9 , [A. N. S. P.] 



Singapore, British Straits Settlements, (from C. F. Baker), 2 9 . 



Hexacentrus mundus (Walker) 



1869. Piura munda Walker, Cat. Dermapt. Saltat. Br. Mus., II, p. 282. 



[ 9 ; Ceram, [Moluccas].] 

 1920. Hexacentrus spiniger Karny, Verh. Zool.-bot. Ges. Wien, XII, p. 32. 



[cf; Mount Makiling, Luzon, Philippine Islands.] 



Davao, Mindanao, Philippine Islands, (from C. F. Baker), 



1 d 1 , 1 9. 



Sandakan, British North Borneo, (from C. F. Baker), 1 d 1 . 



Kina Balu, British North Borneo, 1 cf. 



Obi Island, Moluccas, 12 tf , 23 9 . 



Karny's recently described H. spiniger is a synonym, as indicated 

 above, based on a very large and exceptionally intensively colored 

 individual. 97 



The additional synonymy indicated by Kirby is apparently 

 correct, except that we find Stal's annulicornis to be a very distinct 



97 Should the Malayan form be found sufficiently distinct from the Melanesian 

 to warrant racial recognition, the name sellatus (Walker) would have priority 

 over spiniger Karny for the more western race. In the present material the 

 Moluccan males have the tegmina averaging broader and tapering more rapidly 

 distad than in the Malayan males. In so plastic a species, however, we believe 

 it very unwise to attempt to recognize races on so slight a difference, and that 

 indicated in but one of the sexes. 



