NOTODONTIDAi. 85 



shouldered ; body somewhat flattened on the back and sides, 

 tapering to the tail, where are two rather short, straight 

 points or tentacles, abundantly roughened with minute points 

 at their base ; and above is a short point. Head dark reddish- 

 brown, mouth paler ; at the back of the head commences, on 

 the second segment, a broad rich reddish-brown dorsal blotch, 

 which runs to a point on the back of the third segment, where 

 is a slight elevation ; on the fourth it recommences and becomes 

 broader on each segment to the eighth, where it extends below 

 and encloses the spiracles, thence it narrows to the tenth, 

 continuing on the eleventh and twelfth as a broad stripe, and 

 widening on the thirteenth, where it again narrows to the 

 tentacles ; in the broad portion of this dorsal marking are 

 faint indications of two or three orange spots; on each 

 side it is broadly edged with pale yellow, and on the sixth, 

 seventh, and eighth segments its margin is deeply indented. 

 A faint double dorsal darker line is just visible. Sides of the 

 body and under surface brilliant, velvety, yellow-green, with 

 faintly dotted indications of spiracular lines ; spiracles green, 

 faintly outlined with black ; legs red ; prolegs yellow ; under 

 surface and prolegs sprinkled with minute red-brown spots 

 ringed with yellow. (Buckler.) 



July to the middle of August on birch and alder, eating the 

 leaves, and usually resting on the upper side of a leaf. 



The confusion among authors as to this larva is very great. 

 This has been completely exposed by Mr. W. F. Kirby in the 

 pages of the Entomologist. Even the figure in the most 

 recent German illustrated work (1893) is inaccurate. The 

 specimen from which Mr. Buckler made his figure and 

 description was furnished by the collector (Mr. Tester) who 

 has probably reared more examples of this species than have 

 been obtained by any other person in this country ; it was 

 found on birch in Tilgate Forest, and there is no room for 

 doubt as to its accuracy. 



Pupa undescribed ; in a hard cocoon of silk and raspings of 



