PHASMID.E. IIETEROPTERYX. 



81 



curious species, of which both sexes have recently been 

 sent to this country by Mr. Wallace from Aru; the female 

 of which bears a close general resemblance to the species of 

 Ceroys, but the antennae are those of Bacillus ; whilst the 

 male is slender and winged, with the legs spined as in the 

 female, but having the lobes of the four hind legs reduced 

 to dilated spines. 



1. (210.) Dimorphodes Prostasis, Westw. 

 Plate XXXIV. fig. 4, male ; fig. 5, female. 



Luteus (mas alatus) aut fuscus (fcemina aptera) ; capite 

 quadrato, postice rugoso ; pro- et mesonotis rugulosis, sin- 

 gulo ad medium marginis antici bispiuoso, angulis duobus 

 superis femorum 4 posticorum 4-spinosis, spina 3* foliacea ; 

 antennis brevibus, articulo basali dilatato. 



Mas. Elongatus, subcylindricus, granulis mesonoti al- 

 bidis; tcgminibus ovalibus, luteis, carina elevata intus nigra ; 

 alis albidis, apice paullo obscurioribus, area costali sublutea, 

 linea media nigra ; abdomine nitido. 



Foem. Latior, fusca, rugosa, opaca ; metanoto utrinque 

 ante medium serie obliqua spinarum parvarum tuberculo- 

 que conico porrecto ante coxas posticas, segmentis basa- 

 libus abdominis in medio marginis basalis et ad latera 

 marginis postici bispinosis. 



Long. corp. maris, una 1\ ; cap. lin. 2 ; anten. lin. 8 ; 

 mesoth. lin. 5^; metath. lin. 5; abdom. lin. 14i+lin. 5 = 

 lin. 19^ ; tegm. lin. 3 ; alar, expans. una 2f . 



Long. corp. feem. una 3J ; cap. lin. 3 ; anten. lin. 8 ; 

 mesoth. lin. 9 ; metath. lin. 6£ ; abdom. lin. 17i + lin. 6 = 

 lin. 23|. 



Hub. Insula Aru prope Novam Zealandiam (D. Wal- 

 lace). In Mus. W. W. Saunders. 



The male of this curious species is slender and subcylin- 

 drical, of a brownish luteous colour, with the abdomen 

 glossy. The head is rather longer than wide, rugose above, 

 especially behind, with large eyes. The antennae are short, 

 about 20-jointed ; the basal joint broad and flat. The 

 prothorax is rugose, and armed in front with two short 

 spines ; two larger spines also arm the middle of the front 

 margin of the mesonotum, which is covered with minute 

 whitish granules, as is also the mesosternum. The teg- 

 mina are small, oval, and with the middle of the carina mo- 

 derately elevated, the disc of the tegmiua within the carina 

 being marked with a black spot. The wings are of mode- 

 rate size, opake whitish, with a rather darker outer margin ; 

 the costal area pale luteous, with the fore margin browner, 

 and with the chief veins (especially the median one) marked 

 with black lines ; the latter is furcate near the base. All 

 the legs are finely serrated, with the four posterior femora 



armed along each of the two upper angles with four eqiu- 

 distant spines, the third being the largest and subfoli- 

 aceous. The extremity of the abdomen in the unique male 

 which I have seen is distorted, but the terminal ventral seg- 

 ments are but slightly swollen and very short. The tarsi 

 are short, with the basal joint not so long as the remaining 

 joints. 



The female is opake brown, more rugose than the male. 

 The head subquadrate, with the hind margin very rugose. 

 The antennae are still shorter than those of the male, with 

 the basal joint more dilated. The pro- and mesothorax are 

 spined as in the male. The metanotum has on each side, 

 near the middle, an oblique row of short diverging spines ; 

 and there is a conical rugose lobe just in front of each of 

 the posterior coxae. The abdomen is cylindrical and ru- 

 gose ; the anterior segments have two small erect spines in 

 the middle of the anterior margiu, and a diverging one 

 at each side of the posterior margin ; the three terminal 

 segments have a raised and flattened irregular carina along 

 the middle, which in the eighth segment is prolonged 

 and furcate, and the last joint is spinose above ; the whole 

 under-surfaee is armed with small spines. The operculum 

 is swollen at its base, and extends to the extremity of the 

 body. The legs are short and rugose ; the spines larger 

 than those of the males. The tarsi are very short, with 

 the basal joint not longer than the two following joints. 



Plate XXXIV. Fig. 4. The male, of the natural size. 

 Fig. 5. The female, of the natural size. 5 a. The terminal seg- 

 ments of the body seen laterally. 



Genus 17. HETEROPTERYX. 



Heteropteryx, G. R. Gray, De Haan (p. 108). 

 Diapherodes, Sect. A., Burmeister (p. 574). 

 Eurycantha, ? ?, Serville (p. 280). 



Body spinose, furnished in both sexes with moderate- 

 sized tegmina, and small wings of nearly equal size in both 

 sexes ; costal area not distinct, covered by the tegmina 

 when at rest. 



Body of the male rather slender, with the metathorax 

 swollen ; of the female broad, with the basal segments of 

 the abdomen dilated ; the terminal segment with a corneous 

 elongated joint-like appendage, extending considerably be- 

 yond the extremity of the operculum. Legs robust and 

 spined, but not lobed. Anterior femora not sinuated at 

 the base. Tarsi with the basal joint short. 



The discovery of the male of a species, of which the female 

 agrees in general character with the insect of the latter sex 

 long known by Parkinson's figure in the ' Linnsean Trans- 



