208 Ml-. W. Schavis on 



above the lower bnvler of the trunk and just below a suiooth 

 enlarged postelavicular scale. Its rays are nearly uniform 

 in stoutness and articulated only quite at their extremities. 

 The scales seem to have been large, thin, smooth, and deeply 

 overlapping. 



In general aspect this imperfect fish is very suggestive of 

 Syllamus, a Clupeoid from the Chalk, both of Europe and of 

 North America ; but it differs from the kuowu species of 

 the latter genus in the deeper cleft of its mouth, the shape 

 of its mandible, and the relatively larger size of its maxillary 

 teeth. 



The specimen was presented to the British Museum 

 (Natural History) by the Director of the Imperial Institute, 

 during 1905. 



XXI. — Xew Species of Heterocera from Costa Rica. — X. 

 By W. SCHAUS, F.Z.S. 



Micrantha moUita, sp. n. 



Palpi brown; frons whitish green ; vertex and collar buff, 

 shnded with light brown and with a few dark irrorations on 

 collar; thorax mottled buff and white, darkly irrorated in 

 front ; abdomen buff-brown, with paler segmental lines. 

 Fore wings : base roseate buff, shading to gr^iy medially and 

 from vein 2 to inner margin teiminally ; some dark scales at 

 base of inner margin ; an indi.-tinct brownish geminate aute- 

 niedial line; orbicular and reniform space pale green; a 

 oreenish space below orbicular ; the costa medially mottled 

 gre}' and brown; a greyish-brown medial shade, tinged with 

 dull green, expanding below reniform ; renitbrm space 

 followed by a wiiitish line and by a large brown space to near 

 apex, which is crossed by the fine postmedial outeurved and 

 geminate luimlar line, this line being tilled in wiih white on 

 costa ; a subterrainal line, whitish from costa to vein 5, roseate 

 buff below 5, crossing the brown space near apex, inwardly 

 shaded with green between 7 and 4, and followed by a dark 

 brown spot between G and 4 ; a terminal interrupted black 

 line, inwardly edged with whitish; cilia green. Hind wings 

 fuscous ; a terminal black lino. 



Expanse 22 mm. 



IJab. ksixola. 



