50 J. Wood-Mason — Species of PJiasmidcs. [No. 1, 



Total length of body 2 in. 10 lin, ant. 3i, head If, proth. 1^, mesoth. 

 6i, metath. 5, abd. 15| + 3f = 19i lines. 



Hah. — Samagooting, Naga Hills, Assam. One immature specimen 

 collected by Capt .in Butler. This species is closely allied to B. TFestwoodii. 



BACiLLrs Westwoodii, n. sp. PI. YI. Fig. 3. 



$ Elongate, slender, sub-cylindrical, convex. Head narrowed from the 

 eyes to the base, with its sides slightly convex, armed between the eyes with 

 two forwardly and slightly outwardly directed spines ; and with its posterior 

 margin faintly notched in the middle and on each side. Antennae more than 

 half as long as the mesothorax, from 21 to 26-jointed ; first joint carinated 

 above and depressed but not expanded ; second joint nearly as broad as long ; 

 the rest filiform with the exception of the last which is thickened at the tip. 

 Mesothorax slightly narrowed in front and, with the metathorax, somewhat 

 expanded at the insertion of the legs. The abdomen is narrowed from the 

 base to the apex of the first segment, expands again to the apex of the 

 second, maintains pretty much an uniform width for the next two or 

 three segments and finally gradually tapers to a point. The seventh dorsal 

 segment is twice the length of the eighth, but hardly exceeds the last. This 

 is cleft and slightly compressed at the extremity. The operculum is some- 

 what boat-shaped, below strongly carinate for its posterior half, and comes 

 into such close and complete opposition with the margins of the terminal 

 dorsal segments, with which it is coincident, as to conceal from view 

 the genital parts, permitting only the tips of the cerci to emerge. Legs 

 triquetrous, their edges beset with short cilia ; straight portion of upper 

 edge of fore femora serrated nearly to the apical end ; the intermediate and 

 hind femora have a triangular spine below at the apex ; all the tibiae have a 

 foliaceous carina arising near the base and gradually subsiding towards the 

 apex ; the posterior ones have sometimes a triangular foliaceous spine 

 near the base above ; the intermediate ones sometimes one, two or none. 

 Tarsi triquetrous ; first joint of the anterior pair as long as the others taken 

 together ; in the other legs it is not nearly as long as the united lengths of 

 the remaining joints. 



Total length of the body 4 in. 8 lines, antennae 6i, head 2|-, proth. 

 2, mesoth. 11, metath. 8, abdomen 27|- + 5^ =33. 



Abdomen : rest of body : : 1-4012 : 1. 



In the specimen described, the intermediate legs when stretched straight 

 backwards, reach to the commencement of the posterior third of the fourth 

 abdominal segment, the posterior legs to the cerci anales ; in other 

 specimens the intermediate legs extend rather beyond the fourth segment, 

 and the posterior ones beyond the extremity of the abdomen. 



Hob. — Nine adult and three immature females were captured by my 



