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cept that the yellow of the wings is even a richer gold, and 

 still more silky in texture ; the three discal black orbicles 

 are slightly edged with green, and the entire area of ab- 

 dominal-marginal and submedian black of the upper 

 surface of the wings is replaced on the under surface by 

 golden green, with a clouding of yellow ; the black veins 

 are very thinly and delicately shown, except the basal 

 section of the median vein which is stoutly black ; the costa 

 narrowly black ; the outer margin only very thinly out- 

 lined in black; the abdominal marginal-fringe of hairs 

 light burnt-sienna colour, and not very prominent. 



Head black ; eyes, deep brown, underlined with ochra- 

 ceous whitish-yellow ; thorax, velvety black ; antennae, 

 • black ; abdomen, golden orange yellow, with a triangulate 

 dorsal black mark on the anal segment. Thorax beneath, 

 black, with a small red pectoral patch only ; legs, black 

 and with the tibia shaped like that of Sch. Meridionalis 3- , 

 (resembling the tibia of some of the Hymenoptera), as will 

 be seen by reference to the plate ; this applies only to the 

 2nd and 3rd pairs of legs, especially the latter ; abdomen, 

 yellow, black at its junction with the thorax — the first three 

 or four articulations are black, with a row of a small lateral 

 black dots. The wings are without the marginal light 

 fringe-lunules found in most of the Ornithoptera ; but it 

 may be pointed out that this is the case with all the <7 $ 

 of the Genus Schoenbergia, 0. Priamus, and the upper 

 sides of some other species of the Genus Ornithoptera, 

 but not on the undersides. In Schoenbergia the lunules 

 are not found on either surface, but are always present in 

 the females. 



Anterior wing : length of costa g4 mms. ; of posterior 

 margin 61 mms. ; of interior margin 55 mms. 



Posterior wing : greatest length 60, and greatest width 

 48 mms. 



Length of thorax with head, 22 ; of abdomen, 45 ; and 

 of antennae 36 mms. The antennae are delicately grace- 

 ful in form and thin — as in all the species of the genus 

 the apex being very little thicker than it is at its base. 



Length 1st pair; femur, 14; tibia, 10; tarsi, 15 mms. 



of -2nd „ ; „ 15; ,, 16; ,, 17 ,, 



Legs. 3rd ,, ; ,, 16; ,, 15; ,, 19 ,, 

 Habitat : Kapa Kapa, British New Guinea. 



In comparing Titan with some of the species of the 

 other genera of the Troides we notice that in all 

 the S $ of the Schoenbergice golden or apple green, and a 

 richly glowing silky golden-yellow occupies a larger space 

 on each surface of the wings than does the black. This 

 yellow is not found in any of the <? <? of the Genus 

 Ornithoptera, except sparingly. In 0. Priamus only one 

 small patch is found on the under surface of the posterior 

 wing, with one or two minute yellow dots, and a longi- 

 tudinal dorsal stripe in the lemon yellow of the abdomen. 

 In 0. Cassandra there are sometimes as many as six or 

 seven submarginal spots, in 0. Richmondia there is a 

 similar arrangement ; in O. Poseidon five or six in similar 

 positions; in 0. Crcesus there are several of different shapes 

 above in the golden scarlet, and below in the green of 

 the posterior wings ; fewer in number but larger in area 

 in 0. LyJius; very small djts on the undersides of 

 the posterior wings of 0. Urviliiana. In they£theopterons 

 only two, three, or four small spots on either surface of the 

 posterior wings, set in the midst of a bright -lemon 

 yellow. In the Pompeoptera species we do not meet 

 with quite the same quality of yellow. 



The anterior wings of Sch. Paradisea <? have the 

 brighter areas of colour arranged nearly the same as in 

 Titan, so also do those of Sch. Meridionalis and Tithonns 

 but this is never the case with the species of the other 

 genera. In all the species of Schoenbergia, the arrange- 

 ment of colours of the posterior upper surfaces is similar in 

 plan — the black always occupying the same position, the 

 ye 1 low becoming more and more dominant till we reach 

 Titan, where it almost entirely fills the wing area : the 

 same may be said of the under surfaces. In general ap- 

 pearance the form of Titan, though larger somewhat, 

 suggests that of 0. Priamus or 0. Crcesus: the abdomen 

 also bears a resemblance to the bodies of those species. 



A more detailed description of the legs of this species 

 studied microscopically will, by the aid of detail figures in 

 my plate, give a faint idea of their character. Of course, 

 the following is only a very slight contribution to an 

 examination of the anatomical structure of the legs. We 

 take the posterior or 3rd pair of legs first for obvious 

 reasons. 



The tibia at midway of its length on its outer side, 

 nearly three times the width of the tarsus ; quite smooth 

 and nitid, or without scales or setae ; also slightly de- 

 pressed midway, and tumid at the junction (or torulus) 

 with the tarsus ; on the side that presses close to the 

 thorax, the tibia is convexed, or raised down the middle, 

 so as to allow the femur to be pressed close to the outer 

 side when in a state of rest ; on the side opposite, which is 

 also smooth, where the femur is pressed, is a shallow groove 

 4 or 5 mms. long, within five or six mms. of the junction 

 with the femur. What purpose this serves it is difficult 

 to say. The inner edge of the tibia, i.e., nearest to 

 the femur is furnished with two or three rows of very 

 minute setae ; there are the usual two short spines at the 

 torulus in which the tarsus is inserted ; the femur is about 

 half the width of the tibia, with delicate setaeoid scales ; 

 concavely depressed along its entire length on both sides, 

 so that its outer edge is distinctly carinated ; nearly close 

 below the point of union with the apex of the tibia the 

 femur widens out a little on either side, with a distinct 

 transverse indentation, and a slightly irregularly-shaped 

 depression above it. The tarsus is furnished along its 

 entire length with a multitude of setae of varying length ; 

 the first joint is twice the length ot the second ; the second 

 i£ times that of the third, fourth or fifth, and the ungues 

 of the 5th joint are only normal in length. The median 

 or second pair of legs, are fashioned nearly like the 3rd 

 pair, but the femur and tibia are about half the width or 

 thickness of the 3rd— the tibia being the widest ; the 

 ungues longer than in the third. The anterior pair of legs 

 are grooved, moulded, and carinated much like the 3rd 

 pair— the scale-like spur nearly half-way of the length of 

 the tibia, and gracefully formed ; the 1st joint of the 

 tarsus nearly three times as long as either the 2nd, 3rd, or 

 5th, the penultimate or 4th joint shorter than either ; the 

 ungues equal in length to those of the median pair of legs. 

 Close to the junction of the tibia and femur, where they 

 press together in a state of rest is a small, nearly U-shaped 

 yellow patch, which, viewed microscopically, appears to be 

 a bladder-like group of muscles, somewhat like a similar 

 organ to be found on the legs of many Lamellicorne 

 and Longicorne Coleoptera except that the latter are gener- 

 ally covered superficially by pulvilli : these may, in the 

 butterfly, act as a pad for the prevention of friction, or may 

 be slightly elastic in their function, or serve both purposes. 

 Only careful dissection could decide the question. 



