390 Transactions of the Society. 



without breaking the shape of the whole. Eostrum small and 

 colourless, articulated as in the female, fairly corresponding to that 

 of B. homhi, hut with spatulate or leaf-like rostral hairs, which 

 give a singular appearance. One pair of long hairs on the dorsal 

 surface of the cephalothorax. 



Abdomen the same width as the cephalothorax anteriorly, 

 but after less than two-thirds of its length becoming much narrower, 

 almost rod-like, and ending in a point posteriorly. There are four 

 pairs of very long spines round the oval part, the fourth pair being 

 at the commencement of the rod-like portion. 



Legs. First pair long, nearly straight, with very small 

 single claw and numerous spines and hairs. Second leg shorter 

 and more recurved. Each leg of these two pairs bears a large and 

 singular sausage-shaped projection from the upper portion of the 

 tibia, which is most unusual. Third pair very similar to the second, 

 but straighter ; both these pairs have the usual double claw. Fourth 

 pair thick, incurved, about reaching the end of the abdomen ; blunt- 

 ended; clawless, but with three very large curved setae on the 

 outer side near the end of the tarsus and one smaller seta on the 

 tibia. 



Larva. 



This is very different from that of D. homhi. White, not very 

 transparent. Eostrum very distinct, rounded, with one pair of 

 short, curved, rostral hairs ; remainder of the cephalothorax much 

 broader ; sharply divided from the abdomen by a nearly straight 

 constriction. On its dorsal surface are two papillae bearing 

 very long, straight hairs ; and two similar hairs stand out laterally 

 from about the middle of the, edge. The abdomen widens and 

 thickens rapidly after the Imeof juncture with the cephalothorax 

 until it has attained about one-third of its length ; after which it 

 diminishes eqr'lj rapidly; this produces the effect of two paired, 

 and extremely large, mamillary projections from the side of the 

 abdomen ; and from the point of each of these springs a hair, which 

 is considerably the largest on the body, and quite straight. These 

 hairs stand out horizontally and laterally, giving a very strange 

 effect. The posterior angles of the abdomen are produced, forming 

 large papillse, from which long curved hairs spring; there is 

 another large hair just below them, and there are two pairs of 

 papillae bearing long straight hairs on the notogaster. On the 

 hind margin, but lower in level, are a pair of papillae, produced 

 into short tube-like structures, each of which bears a long incurved 

 hair, and has a shorter downwardly curved hair at its base. Between 

 the two last-named papillae is an unpaired projection in the median 

 line bearing two short recurved hairs at its tip. 



