PHASMIDiE. BACTERIA. 



21 



The above description is copied from Fabricius, and it 

 will be seen that it affords no absolute characters either for 

 the determination of the species or sex of the insect which 

 served for the Fabrician description, and which was con- 

 tained in the Collection of Lund. The insect which was 

 regarded as this species by Mr. G. R. Gray, in the Collec- 

 tion of Mr. Children, is now in the British Museum Col- 

 lection. It is a female, measuring 3 inches 7 lines in 

 length, and was received from the Rev. L. Guilding of St. 

 Vincents. The description given by Mr. G. R. Gray is — 

 " Virescens, corpore subplano, subscabro, linea media ele- 

 vata ; femoribus lineis clevatis striatis." The proportions 

 of the body are — Head, lin. 2£ ; proth. lin. 2; mesoth. 

 lin. 101 ; metath. lin. 4f ; abdom. lin. 17+ lin. 5=lin. 22. 

 The abdomen is destitute of dorsal appendages, and is 

 gradually narrowed to the extremity, where it is slightly 

 truncated, exposing the two small anal styles. The oper- 

 culum varies in length in different specimens ; the full- 

 grown individuals having it extended beyond the last seg- 

 ment of the body about the length of this joint ; in others 

 it only reaches to the extremity of the body. 



The insect, however, which Dr. Burmeister regards as 

 B. Calamus, is quite distinct from that above described by 

 Gray. His character is — 



B. Calamus, abdominis segmento 4to supra pone mar- 

 ginem posticum lobato. Mas : laevis, tarsorum articulo lmo 

 subcristato ; relatio mesothoracis ad metathoracem=3 : 2 ; 

 abdominis segmento penultimo utrinque processu acuto 

 dependente. Fcemina : subscabra, thorace spinoso, tarsorum 

 articulo 1 mo cristato ; relatio mesothoracis ad metathora- 

 cem=8 : 5. 



Long. corp. maris 4" 9'" ; foem. 7" 1'". 



The male is referred to StolPs fig. 81 (not 87 as mis- 

 printed in Burmeister) ; but Stoll's insect is nearly 5^ 

 inches long, and his figure neither represents any lobe on 

 the fourth dorsal segment of the abdomen, nor any dilata- 

 tion of the basal joint of the tarsi ; whilst the female de- 

 scribed by Burmeister is twice the length of Guilding's 

 specimen described by Gray. An examination of the 

 Lundian specimen, if still in existence at Kiel, can alone 

 solve this question. 



Stoll's figure 81, on the other hand, is given by Mr. G. 

 R. Gray as the larva of a species of Cladoxerus (" C.fili- 

 formis 1 " G. R. Gray) ; and in the Paris Museum I found 

 a similar male sent from ' De la Mana' by Leschenault, 

 named Cladoxerus gracilis, fern.* I entirely agree with 

 Dr. Burmeister in regarding Stoll's figure as the male of 



* M. Scrville also (Ann. Sc. Nat. xxii. p. 60) regards this figure of 

 Stoll as the larva of a male of the genus Cladoxerus. 



a large species of Bacteria ; but it appears to me uncertain 

 to which species it really belongs. 



2. (54.) Bacteria Canna. 



Abdomine cylindrico ; tarsorum articulo lmo cristato, 

 medio angulato ; pedum mediorum femoribus prope basin 

 unilobatis. Mas. Mesothorace lsevi ; tarsorum articulo 

 lmo reliquis longiore. 



Long. corp. 5" 4'" ; mesoth. 1" 6'"; metath. 1". 



Fcemina. Mesothorace spinoso vel spinuloso ; tarsorum 

 articulo lmo reliquis sequali. 



Long. corp. 7\" ; mesoth. 2" ; metath. 14'". 



Phasma (Bacteria) Canna, Be Haan, Orthopt. Orient. 

 p. 101. 

 Hab. Apud Promont. Bon. Spei. 



" Obs. Affine B. muricatce Illig., Burm., sed majus." 



3. (55.) Bacteria simplicitarsis. 



" B. Arumatice affinis, pedibus gracilibus, tarsorum ar- 

 ticulo lmo longo simplici." — G. R. Gray. 

 Bacteria simplicitarsis, G. R. Gray, Syn. Phasm. p. 43. 



Hab. ? B.M. 



Obs. The typical specimen of this insect, described as 

 above by Mr. G. R. Gray, is in the National Collection. 

 It is 6 J inches long ; the relative lengths being — head, lin. 3 ; 

 prothorax,lin. 2f ; mesothorax,lin.20 ; metathorax, lin. 13 ; 

 abdomen, lin. 35 + lin. 6 = lin. 41. The three terminal 

 segments of the abdomen are very short, the last nearly 

 square, with the anal styles very short, but exserted at 

 the hinder angles of the joint ; the operculum extends 

 beyond the last joint to about the length of the latter ; the 

 four hind femora are simple, except near the tips beneath, 

 where they are armed with a small conical spinose lobe or 

 compound spine. 



4. (56.) Bacteria Baucis, Westw. Plate VIII. fig. 8. 



Elongata, subgracilis, pallide lutescens (viridis insecto 

 vivente ?), lsevis ; corpore inermi, subcylindrico ; segmenti 

 basalis abdominis margine laterali membranaceo setoso, 

 segmentis duobus ultimis brevioribus, 9no in medio mar- 

 ginis postici inciso ; antennis et pedibus elongatis ; femori- 

 bus omnibus versus apicem subtus spina instructis (foem.). 



Long. corp. unc. 4£ ; anten. lin. 40 ; proth. lin. 2$ ; 

 mesoth. lin. 12J; metath. lin. 7 ; abdom. lin. 23+ lin. 5 

 =lin. 28. 



Hab. ? B.M. 



