52 J. Wood-Mason — Species of FhasmidcB. [No. 1, 



base forwards ; metathorax of uniform width ; both are marked above with 

 a fine raised median line which is continued on to three or four of the 

 basal segments of the abdomen. 



The abdomen is attenuated from the base of its third segment to the 

 extremity. The three terminal segments are compressed ; the first of these 

 is twice as long as the second ; the second 1-| times as long as the last 

 which is grooved above in the middle line and has its posterior margin divided 

 into two rounded lobes by a narrow fissure filled by the median carina of 

 a small azygos plate ; the upper contour of this last segment meets that of 

 the preceding at a very obtuse angle. The operculum extends about one 

 line beyond the abdomen ; its posterior half is greatly compressed, so much 

 so at its sub-truncate extremity that its opposite inner faces are in complete 

 contact. Cerci minute, conical, their tips alone projecting slightly between 

 the posterior and middle thirds of the last abdominal segment. 



Legs stout, triquetrous ; upper and lower crests of fore femora in- 

 conspicuously serrate towards the base ; the intermediate femora are curved, 

 their upper margin forming the convex curvature, and below at the base present 

 two conspicuous divergent foliaceous expansions with rounded free margins, 

 one springing from each crest and a conical spine at the apex ; the posterior 

 femora are but feebly curved and exhibit but a faint indication of these 

 foliaceous lobes, and have also a spine at the apex below ; all four posterior 

 femora appear to be regularly tricarinate above, owing to the very close 

 approximation of their two upper crests. The intermediate tibiae have a 

 large foliaceous lobe like a tooth of a saw near the base above, which is 

 much reduced or even absent in the posterior pair ; all the tibiae have a sharp, 

 well-developed foliaceous carina, on their basal third below, which in the 

 fore tibiae traverses the whole length of the joint. The first tarsal joint in 

 the fore-legs is hardly as long as the other joints taken together ; in the 

 other legs it is not nearly as long. 



The intermediate legs if stretched backwards would reach only just 

 beyond the apex of the third, the posterior ones to the apex of the sixth 

 abdominal segment. 



Total length of body 7 in. 2f lines ; antennae 8i ; head 8i ; proth. 2^ ; 

 mesoth. 16^ ; metath. 14 ; abd. 40 + 9i + operc. 1 = 50|. 



Abdomen : rest of body : : 1*3655 &c. : 1. 



Hab. — Samagooting, Naga hills, Assam, (Captain Butler) ; Sikkim 

 (Mr. Mandelli) ; and the valleys around Cherra Punji in the Khasi hills 

 (Lieut. Bourne). 



Bacillus (Bactjlijm) Pe^tthesilea, n. sp. PI. V. Fig. 5. 

 $ Elongate, stout, cylindrical, smooth, with a faint raised median line 

 extending from the anterior extremity of the mesothorax nearly to tip of 



