BRUCE P. CUMMINGS — NONDESCRIPT ANOPLURA AND MALLOPIIAGA. 43 



comb-like structures present in other species of the genus ; two long hairs at the 

 posterior angles of the head. Thorax : pronotum narrow in front and rounded, 

 enlarging abruptly at the sides, concave in the metathorax, the postero-lateral 

 angles being large, rounded and prominent ; a T-shaped impression in the upper 

 surface. Three short hairs on each side on the anterior margin behind the head, 

 difficult to detect without a strong lens ; about a dozen hairs on the lateral margin 

 of the broadened posterior area of the prothorax. On the under side, an elongate 

 sternal plate, broad in front, with a shallow bay between the two rounded anterior 

 angles. Metathorax narrow in front and much constricted at the junction with 

 the prothorax ; a linear median impression above, a closely set row of lateral 

 bristles and a sternal plate shaped like a spear-head and pointing backwards. 

 Legs long, unicolorous. The first pair of femora short and thick, the second 

 pair twice as long, third pair still longer. The first pair of tibiae with a dense 

 row of bristles and one long hair on the distal half of the outside margin, the 

 tibiae of the other legs with three long hairs on the distal extremity of the outside 

 margin. Abdomen broad and long, segments closely fitted together, so that the 

 lateral margins are unbroken and continuous, and the smooth bare shining upper 

 surface scarcely interrupted by the sutures. Lateral margins of thick chitin are 

 more clearly visible from below. In the cJ the spiracle in each segment lies in a 

 notch in the inner margin of the lateral border. The segments are of different 

 lengths, I being the shortest, II a little longer, and each succeeding segment 

 longer than that which precedes it. In the Q , IX is lanceolate, long and elegantly 

 curved ; in the c? it is short, rounded and broad at the end, being received into 

 the concavity of the posterior margin of the preceding segment. Attached to 

 almost the whole of the posterior margin of the second sternite is a short soft 

 flap or " flounce," 0*25 mm. in length, grooved and furrowed longitudinally. On 

 the lower corner of each segment a long hair, not at the angle, but just inside the 

 margin on the dorsal surface. Upper surface of the lateral margins of each 

 segment with a series of short hairs, one (sometimes two) of these being a little 

 longer than the rest ; on the lower side of the lateral margin of each segment 

 four or five small hairs ; at the lower corners of segment Vila long bristle on 

 the dorsal side, another on the ventral and several at the edge ; VIII similar ; 

 in the Q, IX has a fringe of moderately long, closely spaced hairs all round the 

 edge, and on its dorsal surface, half-way down and a little distance from the edge, 

 four hairs in a group, one long one and the others smaller in descending ratio. 

 Lower lip of the vulva supported by two long ill-defined slips of brown chitin, 

 one on each side ; the upper lip partially concealed, produced into a quadrilateral 

 Hap, stretched between two stout brown rods of dense chitin ; each rod with 

 several long wiry bristles at the tip ; a transverse curved slip of chitin connecting 

 the base of each rod with the lateral margin of the segment. In the $ the 

 terminal tergite is short broad and elliptical, with several long hairs at the sides 

 and two very long hairs, one on each side of the posterior margin ; across its 

 breadth a series of minute bristles ; the whole area of the tergite divided up by a 

 median and a transverse pale line into four taches, the two anterior ones being the 

 shortest ; just within the terminal aperture is a somewhat bilobed lappet, with 

 four hairs on each lateral lobe. Terminal sternite longer than and overlapping 

 the tergite, a median longitudinal line dividing it into two areas. 



