170 



[January, 



Fig 3. 



? (Fig. 1). Head small, eyes prominonfc, roBtmm thict, conical. Antennse 

 (Fig. 3) fulvous, short, tapering, of eight joints, the 1st thick, sometimes infuscate, 



2nd to 7th constricted 

 i ; v'V. j^u VI \ / IT hejond the middle so as 



1 / ^^^Jfef^Li^ xs^^'^^z:^ to simulate two joints, 



the 8th long, slender, 

 pointed, black. Body 

 (including the thorax) 



5 111 I Jl I ^ piceous-black above, 



I I I I short - broad - oval, sur- 



'" " ' rounded (except over the 



head) by a marginal se- 

 ries of snow-white, late- 

 Fig- \- Fig- 2. i-ally connected, lamellae, 

 which, after the first three on each side, are directed backwards and downwards, 

 gradually increasing in length, the posterior ones overhanging the marsupium ; but 

 of these the middle three are shorter and more distinct, the median one, over the 

 middle channel, shortest and broadest of all, either turned up vertically or horizontal 

 and having a median sulcation ; the dark surface of the body level, nude, the seg- 

 mentation plainly discernible, but on the middle are two longitudinal, narrow, 

 contiguous yet distinct lines of small, granulose, white lamellate projections. These 

 lines, beginning at the base of each antenna, extend backward, for a short distance 

 convergently, but almost immediately after each curves outward and again inward, 

 so as to leave a small, dark, oval space between them, then both are parallel and 

 close together up to the anal extremity. Marsupium snow-white, varying in length, 

 margins straight, parallel ; the upper-side shorter than the lower, longitudinally 

 canaliculate, the median channel wide, two others on each side of it very narrow, 

 and further down on the rounded sides are usually slight striate indications of one 

 or two more channels : under-side (Fig. 2) shining, semi-tubular, being transversely 

 very arched, smooth, with the faintest traces of transverse indications of the pro- 

 gressive stages of development ; posteriorly curved upward, apex truncate, but the 

 lateral angles produced. Legs fulvous ; thighs darker ; tarsi monomerous, not one- 

 third the length of the tibiae ; one terminal claw. 



Length of body, 1 mm. ; with marsupium, 2 — 4'5 mm. ; maximum breadth of 

 marsupium, 1"5 mm. 



This remarkable species is distinguished from all others hitherto 

 tnown by the male having only two anal filaments instead of a fascicle 

 of them, and by the female having the whole dorsal surface free from 

 cereous covering, except the two narrow, median, white, projecting 

 lines. Some of the joints of the antennse of the male, when the 

 insects were fresh, if viewed from the side, appeared to be flattened, 

 but Mr. Gr. S. Saunders (to whom I am indebted for the figures) says 

 on this point, " I mounted three males in balsam after soaking them 

 in water, spirit, and oil of cloves, and the antennse and legs have now 

 assumed their normal form." 



