PHASMIDyE. BACTERIA. 



31 



Long. Corp. fere unc. 5 ; anten. unc. 2f ; protb. liii. 2 ; 

 mesoth.liu. 16; metatb. lin. 11 ; abdom. lin. 24 + lin. 4 = 

 lin. 28. 



Hab. 1 B.M. 



Tbis species rivals Phasma nematodes, De H., in its 

 long and slender proportions ; but its fore legs are mucb 

 shorter, and its antennae longer. The bead is wider than 

 the prothorax, with a dark, broad, longitudinal line along 

 the middle of the crown. The antenn;* are very slender, 

 and reach to the middle of the anterior tibiae. The tho- 

 racic and abdominal segments are very slender and cylin- 

 drical ; the meso- and metathorax slightly dilated at the 

 posterior extremity ; the seventh segment of the abdomen 

 is not more than half the length of the sixth, and is gra- 

 dually widened nearly to its extremity ; the eighth is also 

 widened in the same manner, and the ninth is slightly con- 

 stricted at the base ; it is wider than the eighth, its sides 

 margined, its hind angles rounded off, exposing the anal 

 styles, and its hind margin entire and rounded. The ter- 

 minal ventral segments are mutilated in the unique male 

 specimen in the National Collection. The legs are long 

 and very slender, entirely destitute of spines ; the femora 

 slightly clouded ; the tibiae blackish at the base, and ob- 

 soletely banded with darker brown. 



Plate V. Fig. 3. The male insect, of the natural size. 3 a. 

 The four terminal segments of the abdomen seen sideways. 



36. (88.) Bacteria tenuis, Westw. Plate VIII. fig. 1 . 



Gracillima, filiformis, inermis ; antennis pedibus anticis 

 longioribus ; metathorace perbrevi ; femoribus omnibus 

 ante apicem subtus denticulis minutis approximatis ar- 

 niatis ; abdominis segmento ultimo ventrali apice subtri- 

 fido (mas). 



Long. corp. lin. 34 ; anten. lin. 32 ; proth. lin. 1^ ; me- 

 soth. lin. 10 ; metath. Un. 4 ; abdom. lin. 14 -|- lin. 3 = 

 lin. 17. 



nub. ? B.M. 



Very slender, filiform, destitute of spines on the body ; 

 the head rather large and oblong, with several tubercles at 

 its hinder part ; the antennae are very long (considerably 

 longer than the fore legs) ; the mesothorax is proportion- 

 ately very long, and the metathorax shorter than usual ; 

 the abdominal segments are slightly thickened at the arti- 

 culations ; the three terminal dorsal segments form an elon- 

 gate oval mass, with the surface rather rugose, attenuated 

 behind, and exposing the two slender anal styles, as well as 

 a dilated process pointed at its extremity ; the three ter- 

 minal ventral segments are soldered together, the extremity 



being slightly trifid. The legs are long and slender, and 

 all the femora are very slightly denticulated at a short di- 

 stance before the extremity on the under side. 



I have adopted the JIS. name applied to this species in 

 the British Museum Collection. 



Plate VIII. Fig. 1. The male, oT the natural size. 1 a. The 

 terminal segments of the body seen sideways. 



37. (89.) Bacteria Sarawaca, Westw. 

 Plate XXV. fig. 1, male ; fig. 2, female. 



Fusca, luteo partira varia, crebre granulosa, gracilis ; 

 pedibus gracillimis ; niesothorace longissimo, metathorace 

 abbreviato ; abdomine maris filiformi, stylis analibus dc- 

 flexis vix curvatis, apice obtusis ; fceminae operculi apice 

 acute bifido ; segmeuto ultimo dorsali truncato, serrato 

 (mas et fcem.). 



Long. Corp. maris lin. 34 ; cap. lin. 2 ; anten. lin. 32 : 

 proth. lin. 2 ; mesoth. lin. 10^ ; metath. lin. 3; abdom. 

 lin. 14-l-lin. 3=lin. 17. 



Long. Corp. foem. lin. 46 ; cap. lin. 2\ ; anten. lin. 38 ; 



proth. hn. 2; mesoth. lin. 12; metath. lui. 4; abdom. 



lin. 2l+Hn. 4=lin. 25. 



Hab. In Insula Borneo, Sarawak (D. Wallace). In 

 Mus. Saunders. 



This species is at once distinguished by the great length 

 of the mesothorax, which with the prothorax measures one- 

 third of the entire length of the body. The head is mo- 

 derately elongated, with the sides parallel. The antennae 

 are very long and slender. The prothorax is marked with 

 a blackish line down the middle and at the side, the latter 

 extending along the sides of the meso- and metathorax and 

 abdomen ; the thoracic segments are but very slightly 

 granulose ; the mesothorax is marked with a black spot 

 in the middle of the bind part ; the metathorax does not 

 equal one-third of the length of the mesothorax, its hinder 

 division occupying about two-fifths of its entire length. 

 The abdomen is slender, filiform, the eighth segment longer 

 than either the seventh or last, which is rounded behind, 

 subconvex, with the anal styles beneath deflexed, nearly 

 straight, and subclavate. The legs are long, slender and 

 simple, with the base of the tarsus more than half its whole 

 length ; the thoracic and abdominal segments are mar- 

 gined on the under side with a black lateral line. 



The female is much more robust and considerably more 

 granulose, especially on the meso- and metathorax. The 

 head has the sides parallel, and its hind part has a trans- 

 verse row of small tubercles. The antennae are very long 

 and slender. The metathorax agrees in its small size with 



