64 J. Wood-Mason — Species of PJiasmidce. [No. 1, 



16 + 1. 4f = 8 in. 21 lin. ; post, legs : f. 20 + tib. 18 + tar. 5 = 3 in. 7 lines. 



Abdomen : rest of the body : : 1*3012 (fee. : 1. 



Hah. — A single specimen was collected in the neighbourhood of Baxa, 

 Bhutan Doar, by Dr. Cameron. 



Bacillus (BACULrM) fukcillatus, n. sp. PL V, Fig. 6. 



$ Elongate, cylindrical, smooth. Head unarmed, narrowed from the 

 eyes to the base, with three notches on its posterior margin. Antennae long 

 and fine, as long as the metanotum proper, or as the two basal segments of 

 the abdomen together, 24-jointed ; first joint depressed, not greatly expanded, 

 strongly carinate above ; second longer than broad, sub-cylindrical ; rest 

 filiform. Meso- and meta-notum with a most delicate median line in relief ; 

 the former is of uniform width throughout, the latter very slightly expanded 

 posteriorly at the origin of the legs. Abdomen shorter in proportion to the 

 rest of the body than in the two preceding species, cylindrical to the apex of 

 its fifth segment ; whence it becomes slightly compressed and attenuated 

 to its furcate extremity. A small azygos plate carinated above and with 

 its posterior margin rounded, fills the bottom of the interval between the 

 arms of the fork, which conceal its sides from view from above. The 

 operculum is boat-shaped ; its extremity which is rounded and slightly 

 spread out horizontally, attains the level of the bottom of the fork only. 



The legs closely resemble those of B. Benthesilea, but the four posterior 

 femora have some widely-placed spinules on both their inferior crests ; the 

 intermediate ones reach to the end of the basal third of the 5th, the posterior 

 extend slight beyond the terminal abdominal segment. 



Total length 5 in. 1^ lin. : antennae 8 ; head 3 ; proth. 2^ ; mesoth, 

 12i ; metath. 10 ; abd. 27i + 6i = 33f ; ant. legs, 3 in. 7 lin. ; inter, 

 legs 2 in. 6 lin. ; post, legs 2 in. 11 lin. Colour uniform green. 



The abdomen : rest of body : : 1-2162 &c. : 1. 



Hah. — Baxa, Bhutan Doar, collected by Dr. Cameron. 



This species is at once distinguished from the two preceding, as indeed 

 these are from one another, by the difference in the structure of the 

 terminal dorsal segment ; by the form of the operculum, by the relative 

 length of the abdomen to that of the body, and by the absence of spines 

 from the head. 



In the four preceding species to which M. de Saussure's subgeneric 

 term Baculum may be provisionally applied, the last dorsal segment of 

 the abdomen is mesially grooved above; the line of structuraL weakness 

 thus produced, may possibly subserve the purpose of giving greater ex- 

 pansibility to the segment during copulation and oviposition. This 

 peculiarity of structure is present also in Bacillus {Baculum) Cu- 

 niculusj Westwood, in B. (-B.) HyphereoTij Westwood, and in B. (B.) 



