STRYMONIDI. 139 



similar to the preceding joints, bearing at its unenlarged extremity simply a pair of 

 slightly curved spines, differing in no respect from the others behind, and having 

 its upper surface thickly covered with extremely short hairs ( J ). All the femora 

 of S (and this sex only) heavily fringed beneath with long hairs. Middle tibiae 

 . . . . armed beneath with a very few short and slender spines, and at tip with 

 rather long, tapering, scaly spurs. First joint of tarsi more than equalling the rest 

 taken together, the others nearly equal, all furnished beneath on either side, with a 

 clustered mass or row of small, not very slender, crowded spines, a single one on 

 either side of the apex of each joint being longer, spur-like. Claws small, strongly 

 compressed, tapering to a fine point, strongly curved or bent before the middle, 

 with a small, basal, triangular, laminate tooth beneath ; paronychia simple, slender, 

 nearly equal, curving a little in the opposite direction to the hook, than which it is 

 a little shorter ; pulvillus very minute, thrust forward, nearly circular. Male 

 abdominal appendages : The upper organ with such broad alations as to leave in 

 the middle behind, a broad, deep, notch, the bottom of which is squarely cut ; the 

 alations tumid, well-rounded, of about equal length and breadth ; lateral arms very 

 long, slender, tapering, finely pointed, strongly recurved, and wholly concealed 

 next the inner surface of the alations ; clasps about as long as the upper organ, 

 straight, and rather slender, a little gibbous on the basal half, beyond tapering, 

 but very bluntly pointed. 



Ovum. — Depressed echinoid-shaped, as broad at base as at summit, a 

 little depressed and infundibuliform at the middle of the summit, covered 

 everywhere with greatly and abruptly elevated prominences, connected with all about 

 them by heavy, well-defined ridges, scarcely disposed in rows, leaving between 

 the ridges deep hollows with abrupt sides, above becoming smaller and confused, 

 the openings between the ridges assuming more the form of pits on an otherwise 

 uniform surface. Micropyle sunken in a not very deep pit, obscure, consisting of a 

 few rather large, oval cells, around a minute, central, circular cell, and surrounded 

 by a very few roundish cells of about the same size, their walls faint, but not very 

 delicate. 



Larva (newly-hatched). — Body of nearly equal diameter throughout. The last 

 compound segment tapering and rounded at the tip, flattened on the dorsal area up 

 to the laterodorsal line ; below this sloping to the somewhat laterally produced 

 infrastigmatal margin. Laterodorsal series of hairs consisting, upon the abdomen, 

 of larger, centrally situated, curving hairs, about as long as two segments, and 

 outside, and. a little posterior to them, similar, but shorter and more recumbent, 

 backward-directed hairs, one of each to a segment in each. row. The hairs below 

 the spiracles consist of three on each side, on each segment, one very long, central 

 one, and two shorter, anteriorly placed, the upper the longer. Midway between the 

 laterodorsal, hair-bearing, papillae and the spiracles, but nearer the former, is a 

 series of round, smooth, hemispherical lenticles, situated in the middle of the 

 anterior half of all the segments, both thoracic and abdominal, excepting the large 

 first thoracic segment. The laterodorsal and substigmatal series of hair-bearing 

 papilla? are also repeated on the third thoracic segment, and, to a certain extent, on 

 the others, with certain changes of position, and the addition of others. No 

 laterostigmatal series of hair-bearing papillae. On the last compound abdominal 

 segment, the hairless lenticles of the lateral row form one of a series of five on 

 either side : three larger equidistant ones placed in an open curve, diverging 

 posteriorly from the opposite set, and two smaller ones posterior to these, one 

 behind, and a little outside the other, in the laterodorsal region. 



Larva (adult). — Head small, smooth, rather appressed in front, rounded, 

 a few long hairs about the ocelli ; broadest above the middle, well rounded below ; 

 triangle half as high again as broad, reaching about two-thirds way up the front. 

 Second joint of antennas broader than long, cylindrical but tapering, the third as 

 long as the second, but only half as broad, cylindrical, barely tapering ; fourth a 

 minute wartlet by the side of a long, slightly curved hair. Ocelli' six in number, 

 three above nearly touching each other in a slightly curved row, its convexity 

 forward and upward, in front, three in a straight row along the base of the antennae, 

 the upper being the anterior one of the previously mentioned row, situated at a 

 distance from each other, less than the diameter of one of them ; and a sixth behind 

 the lowest of the last row, so far as to form a right angle with it and the uppermost 

 of all the ocelli ; all of equal size, the sixth flat, the others convex. Labrum pretty 

 large, fully twice as broad as long, the front roundly excised to a moderate depth in 

 the middle, either lateral half well rounded in front. Mandibles short and quite 



