84 THE ENTOMOLOGIST, 



Lithosia complana (Fig. 2). — The harpe is rounded; the clasper 

 is broad for three quarter parts, then narrowed off to a chitinous 

 point. The uncus is parallel, and the juxta is fairly wide with 

 two acute angles on the upper surface, one at each corner. 



Lithosia sericea (Fig. 3). — The harpe is rounded, the clasper 

 is broad for three quarter parts, then narrowed off to a chitinous 

 point. The uncus is parallel; the juxta is a little narrower, with 

 two acute angles on the upper surface, one at each corner, 

 smaller than in the preceding species. 



Lithosia pyginceola (Fig. 4). — The harpe is rounded ; the 

 clasper is broad for three-quarter parts, then narrowed off to a 

 chitinous point. The uncus is parallel, much broader than pre- 

 ceding species. The juxta has the two acute angles similar to 

 the above species, but again smaller. With the exception of 

 2)>jgin(sola being smaller than sericea, and the latter smaller than 

 com-plana, these three species are so closely similar that I do not 

 think I could tell the species by examination of the genitalia 

 alone, without comparison in size. 



Lithosia caniola (Fig. 5). — The harpe rounded; the clasper 

 broad for three-quarter parts, then narrowed to a chitinous 

 point ; the uncus slightly thickened in the middle. The juxta is 

 broad and curved, highest in the centre, gradually narrowing off 

 and giving the appearance of steps. 



Lithosia quadra (Fig. 6). — Harpe rounded and indented at the 

 apex ; the clasper sharply broadened out for one-third, where 

 there is a little knot of spines, then as suddenly narrows into the 

 chitinous point. The uncus strong, slightly narrower at the base. 

 The juxta I have been unable to quite make out, but it appears 

 to be bent over and divided into two round lobes. 



Lithosia aureola (Fig. 7). — The harpe rounded ; the clasper 

 broad at the base for about a half, when it narrows off to the 

 chitinous point, which is file-like for a small portion of the tip. 

 The uncus is long and tapered. The juxta is bifurcated and 

 lobed, the lobes being furnished with file-like teeth. 



Lithosia complanula (Fig. 8). — The harpe is rounded ; the 

 clasper broad for about one-third, when there is a little knot of 

 short file-like teeth, and just beyond narrows to the chitinous 

 point, which is clothed with the file-like teeth ; the uncus long 

 and parallel, and the juxta is squarely angulated with acute 

 angles. 



Lithosia muscerda (Fig. 9). — The harpe is bluntly pointed 

 with a projecting blunt tooth on the lower apex ; the clasper 

 broadens out for a little over a third, when it becomes clothed 

 with the file-like teeth and narrows off to a point. The uncus 

 is long and slender, but not acutely tapered until near the tip ; 

 the juxta is rounded. 



Lithosia helveola (Fig. 10). — The harpe rounded ; the clasper 

 is parallel for three quarter parts, when it narrows, then widens 



