32 



CATALOGUE OF ORTHOPTEROUS INSECTS. 



that of the male. The abdominal segments are very slightly 

 marked with a slender longitudinal carina ; they are nearly 

 parallel throughout their whole length ; the terminal dorsal 

 segment is truncate at its extremity, where it is serrated ; 

 and the operculum is deeply and acutely bifid at its e.xtre- 

 niity, and extends beyond the extremity of the body. The 

 legs are long and slender, and entirely simple. The basal 

 joint of the tarsi is about half the length of the tarsus 

 itself. 



Plate XXV. Fig. 1. The male, of the natural size. 1 a. The 

 extremity of the body seen from behind. 



Fig. 2. The female, of the natural size. 2 a. The terminal seg- 

 ments of the abdomen seen sideways. 2 b. The terminal 

 dorsal segment of the abdomen. 



38. (90.) Bacteria Shiva, TFestw. Plate VIII. fig. 6. 



Elongata, subdepressa, abdomine latiori, e segmento 4to 

 ad apicem sensim attenuato, stylis longis duobus apice 

 porrectis terminato ; capita et segmentis thoracicis crebre 

 granulosis ; abdomine striolato ; pedibus simplicibus. 



Long. corp. unc. 2^ ; auten. liu. 12 ; proth. lin. l^ ; me- 

 soth. lin. 5 ; metath. lin. 3 ; abdom. lin. 12 + liu. 4 = 

 lin. 16. B.M. 



Hab. In Indise orientalis partibus septentrionalibus. 



Elongated, subdepressed, with the body widening from 

 the middle of the niesothorax to the middle of the abdo- 

 men, and then gradually attenuated to the extremity, which 

 is acute, and terminated by two straight, broad, exserted 

 anal styles. The head and prothorax are marked down 

 the middle with a fine impressed line and with a granulated 

 vitta, including a fine black line ou each side behind the 

 eyes. The head and thoracic segments are finely granu- 

 lated. The antennae are slender, nearly extending to the 

 extremity of the fore tibise, and the abdominal segments 

 are marked on the upper side with several longitudinal 

 vittae. The legs are moderately long and slender, and en- 

 tirely destitute of spines. The operculum extends nearly 

 to the extremity of the ninth dorsal segment ; it is nearly 

 straight, and not swollen in the middle. 



Plate VIII. Fig. 6. The female, of the natural size. 6 a. The 

 terminal segments of the abdomen seen laterally. 



39. (91.) Bacteria viridis. 



Viridis, glabra ; thorace linea media ; pedibus lineis ele- 

 vatis striatis. 



Long. corp. 2" ; anten. 1" 1'" ; proth. lin. I ; mesoth. 

 hn. 6 ; metath. lin. 5 ; abdom. liu. 1 1 -|-lin. 3 = lin. 14. 

 Bacteria viridis, G. R. Gray, Sijn. Phasm. p. 1/. 



Hab. In lusulis Sandvicensibus. B.M. 



Obs. The two specimens of this species in the National 

 Museum are of the opposite sexes, but appear not to be 

 fully grown. The body is long, slender and cylindric ; the 

 extremity of the metathorax slightly dilated at the origin 

 of the hind legs ; the surface of the meso- and metathorax 

 is finely granulosa (more strongly so in the male). The 

 head is destitute of any spine or tubercle. The fore legs 

 are slender and simple, the middle legs rather short ; the 

 femora with two small spines near the tip beneath ; the 

 middle tibiae rather dilated near the base on the under 

 side (the hind legs are wanting) ; the basal joint of the 

 tarsi is rather longer than the remaining joints together. 

 The abdomen is slender, cylindric ; the ninth dorsal seg- 

 ment is deeply slit (to about half its length) ; the lateral 

 margins strongly deflexed ; on the under side it is furnished 

 with two short obtuse lobes ; the three terminal segments 

 extend to the extremity of the eighth dorsal segment. The 

 body of the female is terminated by a minute anal lobe, 

 the anal styles are very short and obtuse, and the oper- 

 culum, which is flat, only extends to the base of the ninth 

 dorsal segment. 



40. (92.) Bacteria Eutrachelia, Westw. 

 Plate XXIV. fig. 11. 



Valde elongata, gracillima, pallide ciuerea, opaca ; capite 

 postice attenuato ; mesothorace autice parum granulato ; 

 metathorace dimidio mesothoracis breviori, parte ejus pos- 

 tica brevissima ; abdomine in medio sensim latiori et ad 

 apicem attenuato, loboque elongato apicali apice subacuto, 

 instructo (fcem.). 



Long. corp. unc. 3 J ; cap. lin. 2 ; proth. lin. If; mesoth. 



lin. 10 ; metath. lin. 6^ ; abdom. liu. 20 -j- lin. 3-)- lob. apic. 



lin. 2=lin. 25. 



Hab. In Nova HoUandia, Swan River. In Mus. 

 Hopeano, Oxonise. 



This species, of which I have only seen a single female, 

 is well distinguished by its very slender form, its long, pos- 

 teriorly attenuated abdomen, terminated by a slender ap- 

 pendage like a tenth joint, and its uniform dull, jiale grey 

 colour. The head is greatly elongated and narrowed be- 

 hind the eyes ; in front, between the eyes and the base of 

 the antennae, are three minute spear-shaped impressions. 

 The antennae are slender, extending to the middle of the 

 metathorax. The mesothorax is very long and of equal 

 breadth throughout, and with a slender raised median 

 dorsal line (which extends to the extremity of the abdomen). 

 The metathorax measures three-fifths of the mesothorax 

 in length ; its hinder division is very short, not being 

 more than one-sixth of its whole length. The abdomen 



