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Besides the very considerable increase in size, a very decided 

 change is visible 'structurall}', the tegmina have become much 

 longer and are freely articulate at their bases ; beneath them are 

 the^rue flight-wings which are large and membranous. The 

 f<:»rceps have also assumed a relatively greater development. 



Head shining black ; antennae with at least twenty joints, 

 l)lack, except usually the 13th and 14th joints ,which are whitish 

 or pale testaceous (the distribution of these pale joints is ex- 

 tremely variable even on the same individual) ; the three basal 

 .segments semi-glabrous, the rest pubescent, the basal con- 

 siderably the largest and much thickened, the 2nd very short, 

 the 3rd-5th shortish, the rest increasingly longer and slender. 

 Pronotum broader than head, shining black, anterior margin 

 straight, angulate ; the posterior margin rounded. Tegmina 

 long, shining black, sometimes with an aeneous reflection, in 

 the male reaching nearly to 2nd abdominal segment, in the fe- 

 male somewhat shorter. Wings large, when folded in the male 

 reaching nearly to the 3rd abdominal segment ; in the female 

 somewhat less. 



Abdomen flattened, finely granulated, shining black, some- 

 times with an aeneous reflection; in the male ten dorsal seg- 

 ments, the posterior segment large, hind margin straight, tuber- 

 culated and folded, impressed in the middle, eight visible ven- 

 trally ; in the female ten dorsal segments (8th and 9th very nar- 

 row and fused to the loth), the posterior segment large, (less 

 square than that of the male), posterior margin straight, tuber- 

 culated and folded, impressed in the middle ; six segments vis- 

 ible ventrally, (the hidden 7th and 8th membranous. Folds of 

 scent-glands on 4th segment distinct. Forceps long, flattened, 

 m the male larger and more strongly incurved than those of the 

 female, the inner margin irregularly crenulate, with a jagged 

 dilation and a prominent bifid tooth basally. (Another form 

 occurs on these islands in which the basal dilation is reduced, 

 and distinct teeth extend two-thirds of the entire length ; in the 

 female the incurvature is less pronounced, the inner margin is 

 crenulate and devoid of teeth. Pygidium more prominent in 

 female than male. Legs, black, stout, tarsi yellowish, lobe of 

 2nd tarsal joint nearly two-thirds the length of the 3rd joint. 

 (Plate IX fig. I and 2.) 



