20 SYNTOJIID^. 



b'''. Proboscis present * . 



a''. Antenna; clubbed ; hind wing 

 witli vein 8 diverging i'rom 



the cell from base 32. Castniadae. 



b''. Antenlise filiform, rarely 

 terminally dilated ; hind 

 wing with vein 8 approx- 

 imated to the cell and con- 

 nected with it by a bar 41. Zygsenidae. 



b^. Middle spurs of hind tibiae or at 

 least one well developed. 



o'^. Palpi obtuse 49. Tortricidae. 



b^. Palpi more or less acute 50. Tineidae. 



B. Hind wing with the cell emitting more than 

 6 veins. 



a. Maxillary palpi and tibial spurs absent 51. Hepialidae. 



b. Maxillary palpi and tibial spurs well de- 



veloped 52. Micropterygidae. 



Family SYNTOMID^. 



Proboscis usually well developed, but sometimes aborted ; palpi 

 short and porrect, long and downcurved, or upturned ; frons 

 rounded ; antennae simple, ciliated, or bipectinate, usually with 

 short branches dilated at extremity in both sexes ; tibise with the 

 spurs short. Fore wing usually with the terminal area broad ; 

 vein 1 a forming a fork with lh,lc absent ; 5 from below middle of 

 discocellulars ; 7 stalked with 8, 9. Hind wing small ; vein 1 a often 

 absent ; 1 c absent : 8 absent, rarely rudimentary and not reaching 

 costa ; frenulum present ; retinaculum bar-shaped. 



A family of Moths of small or medium size and semi-diurnal habits 

 derived from the Arctiadce, but usually with the fades of the 

 Ziiiicvnido', from some of which, with vein 6 of the hind wing 

 absent, they are not very easily distinguishable at first sight; but 

 these latter have vein 8 of the hind wing usually more or less 

 separate from the cell and connected with it by a bar, and in the 

 fore wings vein 1 c present and 7 from the cell. 



From the Arctiadce they are to be distinguished by vein 8 of the 

 hind wing being absent, but in Xanthopleura, Anaphlebia, many 

 species of Eucereon, and a few other genera, it is present as an 

 aborted fragment not reaching the costa; whilst in certain species 

 of the genus Balisidoia, which is best placed in the Arctiadce, many 

 specimens have vein 8 rudimentary or sometimes entirely absent, 

 and a few have it represented by two or even three rudimentary 

 spurs from the upper margin of cell, so that no very exact line can 

 be drawn between the two families. 



In the Zygsenid subfamily Phaudinw the mouth-parts are aborted. 



