ADDENDA. 



181 



slender, and crossing each other at the tips like a pair of 

 forceps. 



Page 49.— Sp. 2*. (468.) Acanthoderus Wallacei, Westw. 

 Plate XL. fig. 7, male ; fig. 8, female. 



Gracilis ; pedibus longitudine mediocribus, femoribus 4 

 posticis prope apicem subtus spinis nonnullis minutis ar- 

 matis ; prothorace spinis duabus anticis et una postica ; 

 mesothorace spina in medio marginis postici duabusque 

 lateralibus ; metathorace spina erecta pone medium altera- 

 que in medio marginis postici duabusque lateralibus ; seg- 

 ments abdominalibus spina unica in medio marginis postici 

 (3"* multo majori) armatis. 



Mas. Fere lasvis, cylindricus, rufo-luteus ; femoribus 

 margineque postico segmentorum viridi tinctis. 



Fcem. Robustior, granulosa, fusca, segmento ultimo ab- 

 dominis in caudam elongatam corneam recurvam apice 

 acutam subtus concavam producto. 



Long. corp. maris, unc. 2^ ; cap. lin. 1£ ; anten. lin. 24 ; 

 proth. lin. 1^; mesoth. lin. 7; metath. lin. 5 ; abdom. 

 lin. 10 + lin. 2 = lin. 12. 



Long. corp. fcem. unc. 34^ ; cap. lin. 2 ; anten. unc. 2£ ; 

 proth. lin. 2 ; mesoth. lin. 10 ; metath. lin. 6 ; abdom. 

 lin. 14 + lin. 9 = lin. 23. 



Hab. In insula Aru prope Nov. Guineam (D. Wallace). 

 In Mus. Hopeiano Osonise, W. W. Saunders, et B.M. 



The two sexes of this curious species differ greatly in 

 appearance, although the identity in the arrangement of 

 the spines with which they are armed admits of no doubt 

 as to their being legitimately united. The singular struc- 

 ture of the terminal segments of the abdomen of the female 

 especially merits attention. 



Plate XL. Fig. /• The male, of the natural size. 7 a. The 

 terminal segments of the body seen sideways. 



Fig. 8. The female, of the natural size. 8 a. The second and third 

 segments of the abdomen seen sideways. 8 b. The termi- 

 nal segments of the abdomen seen sideways. 



Page 74.— Sp. 4*. (469.) Phibalosoma Apollonius, Westw. 

 Plate XL. fig. 4, female. 

 FcemiuEe preecedentis {Ph. Pythonio) valde affiuis et 

 ejusdem magnitudinis, differt tamen capite et mesothorace, 

 pro ratione, evidenter longioribus ; mesonoti disco et late- 

 ribus spinis validis armatis, spinisque epimerarum meso- et 

 metathoracis multo majoribus ; segmentis abdominalibus 

 basalibus parum brevioribus, horum l mo ad 6 tuI ° lamina ro- 

 tundata plana utrinque instructis ; operculo breviori, stylis 

 duobus internis ultra operculi apicem retro-extensis ; pe- 

 dibus anticis latioribus, femoribus membrana lata serrata 



extus instructis ; pedibus quatuor posticis brevioribus et 

 crassioribus (fcem.). 



Long. corp. fcem. unc. 8| ; cap. lin. 6^ ; anten. lin. 24 ; 

 proth. lin. 6; mesoth. lin. 21; metath. lin. 13; abdom. 

 unc. 3, lin. 9 + lin. 9 + operc. ultra apicem abdom. lin. 4= 

 unc. 4, lin. 10. 



Hab. In insula Vanua Levu, " Feejee Islands" (1). P. 

 M. Rayner). 



Specimens of this fine insect were collected by F. M. 

 Rayner, Esq., Surgeon R.N., of H.M.S. 'Herald' (Capt. 

 Denham, R.N.), in September 1857. Although here given 

 as a distinct species, it will require a knowledge of the male 

 to determine satisfactorily whether it ought to take a higher 

 rank than that of a local variety of Ph. Pythonins, to which 

 it bears so strong a general resemblance. 

 Plate XL. Fig. 4. The female, of the natural size. 



Page 82. — Sp. 1 . Heteropteryx dilatata. 



A specimen of the female of this remarkable species has 

 recently been obtained by W. W. Saunders, Esq., from 

 Borneo, agreeing with the original figure, and of which the 

 following are the proportions : — 



Long. corp. fcem. cum operc. unc. 6^ ; cap. lin. 6 ; anten. 

 — ? ; proth. lin. 6 ; mesoth. lin. 1 1 ; metath. lin. 11; ab- 

 dom. lin. 25+lin. 1 2 + segmentum supplem. lin. 6^= lin. 

 431 . tegm. lin. 23. 



The wings, when closed, extend to the extremity of the 

 tegmina, which reach to the extremity of the second seg- 

 ment of the abdomen ; the ninth segment is followed by a 

 supplemental joint, which is flat above, rather constricted 

 in the middle, terminated by a small narrowed part bifid 

 at its extremity ; the operculum is large and boat-shaped, 

 and extends to the extremity of this supplemental tenth 

 dorsal segment. 



Page 122. — Sp. 17. Phasma Pholcus. 

 Mr. Bates has sent specimens of the female of this spe- 

 cies from Ega, which are rather larger than the males ; the 

 fore tibiae with obscure transverse fasciae, and the costal 

 area slightly clouded ; the posterior area of a browner co- 

 lour, and not so grey as in the male. 



Page 128.— Sp. 3. Necroscia diacanthos. 

 A female of this species, collected at Sarawak, in Borneo, 

 by Mr. Wallace, is in the Collection of W. W. Saunders, 

 Esq., of the same size as the female described and figured 

 above, but with the head produced into two short spines at 

 the top of the crown, the antennae with four white rings 



