146 ' Novitates Zoologhcae XXIII. 1916. 



band of the hindwing diffuse ; some specimens have no red tint at all, while 

 others have the collar, abdomen, abdominal area of the hindwing and the yellow 

 portions of the breast and coxae more or less tinted with scarlet, like the type- 

 specimen of the name pseudodryas. In the female the yellow area of the hindwing 

 is sharply defined, reaching to the point of origin of M 1 , being incurved below M 2 

 and excurved at SM 2 , the mummy-brown distal border extending to the abdominal 

 margin. 



The eighth tergite of the male is thin, in a vertical sense, and not much 

 produced. The ninth tergite has on each side three processes (text-fig. 37). P 1 is 

 very slender, carved upwards and anad, and is, like the very thin setiferous process 

 P 2 , a dorsal branch of the main process P 3 . The latter is elbowed in the centre, 

 where it is slightly widened, and tapers to the apex, the apical portion of the inner 

 edge being denticulate. In the development of these processes S. pseudodryas 

 stands quite isolated. The side-clasper resembles that of S. coccina to some extent. 

 The valve (text-fig. 38, V) is well developed, and the harpe (H) bears a small 

 unciform ventral apical lobe and two small lobes farther proximally. The tenth 

 tergite (x. t.) is very characteristic, its apical widened portion being very broad, 

 reversed cordiform, and at least twice as broad as in any of the other species. 



The eighth sternite of the female resembles that of the females placed above 

 under S. dimidiata (text-fig. 45), but the thin central third of its margin is incurved. 



9. Sychesia omissus Roths. (1910) (text-fig. 39, 40, 47) 



The male is in colour similar to S. dryas ; the thorax and forewing are usually 

 deeper blackish brown, the collar is red in most examples, and there is occasionally 

 also a reddish tint at the base of the abdomen ; the hindwing is, like the abdomen, 

 usually rather deeper yellow than in dryas, the distal marginal band posteriorly 

 more sharply defined and here as a rule also broader, and the median branches 

 are more prominently blackish brown. The size varies a great deal, the forewing 

 having a length of from 22 to 31 mm. The pectinations of the antenna are always 

 much shorter than in dryas, a difference easily perceived if the two species are 

 placed side by side, while there is no reliance on any of the colour-differences 

 mentioned. The female also has a deeper colour than in most dryas. 



The genitalia of the male are very distinct. The eighth tergite is only slightly 

 produced. The ninth tergite (text-fig. 39) has on each side two processes, the 

 upper one (P 1 ) being large, curved in the middle and obliquely truncate at the apex; 

 it appears almost straight from the centre to the apex in a dorsal view. P 2 projects 

 from P 1 on the underside. The side-clasper is quite different from that of the 

 other species ; it consists of a single, long, curved, strongly chitinised sclerite 

 which tapers at the apex (text-figs. 39, 40). The two claspers cross one another 

 beneath the eighth tergite, and are visible without dissection on account of their 

 great length. The tenth tergite (x. t.) is essentially as in S. dryas, only the widened 

 apical portion being rather longer. The genitalia are neither individually nor 

 geographically quite constant. 



The two females which I place here differ very little from dryas. The margin 

 of the eighth tergite is less convex in the centre, and the lateral angles bear a tooth 

 (text-fig. 47). Considering the great difference in the claspers between S. dryas 

 and omissus, one would have expected to find a trenchant distinction between the 

 females as well. 



