ATTACIDES. 



271 



No single tubercle on 9th abdominal segment 



Tubercles prominent . . . . . . . . . . Saturniid/e. 



Tubercles very unequally developed, later aborted . . Agliid^e. 



Tubercles greatly reduced . . . . . . . . Bombycid^£. 



Grote discusses (Can. Ent., 1895, pp. 263 — 271) the classifica- 

 tion of the American Attacids, with the following results : 



I. Fam. SATURNiiDiE. Group I - Attacus, L., Philosamia, Grt., Callosnmia, 

 Pack. Group 2 — Scania, Hb., Satumia, Sch., Agapema, Neum. and Dyar. Group 

 3 — Actias, Lch., Telea, Hb. 



II. Fam. HEMiLEUCJDiE. — Automeris, Hb., Thauma, Hy.-Edw., Coloradia, 

 Blake, Argy ranges, Grt., Hemileuca, Walk., Pseudnhazis, Grt. and Rob. 



III. Fam. Citheroniid^:. — Eacles, Hb., atheroma, Hb., Sphingicampa, 

 Walsh, Anisota, Hb. 



Later, however, basing his results on the neuration ot the 

 imagines, Grote gave (Die Satumiiden, pp. 2 — 5) the following 

 comprehensive table of families, subfamilies and genera : 



Radius of forewing with 3 — 4 branches — III!, III 2 + 3 , 



III 4 + 5 , or III, , III 2 , III3 , III 4 + 5 S ATURNIIDES. 



I. Nervure IVj + IV 2 of forewings forked . . . . . . Saturniid^E. 



A. Hindwings with only one inner marginal nervure. Nervure III! of forewings 

 rises out of III 2 above and outside the discoidal cell (in Attacus it arises out of 

 the radius). 



1. Discoidal cell open . . . . . . . . . . . , Attacin^. 



Cocoons attached to branch by a stalk 



Abdomen furnished with small tufts . . . . Philosamia. 

 Abdomen not furnished with small tufts 



Central spots transparent . . . , . . Attacns. 



Central spots opaque . . . , . . , , CaUosa?nia. 



Cocoons directly attached without stalks . . . . Samia. 



2. Discoidal cell closed . . . . . . . . Saturniijnls:. 



provided with double 



Joints of the antennae of the 



teeth of equal length 

 Joints of the antennas of the ? with double teeth of 

 unequal length 



Central spots opaque 



Thorax clothed with soft wool 

 Covering of thorax mixed with longish 

 flat hairs (''platte Haaren ") 

 Central spots transparent 

 Hindwings rounded 

 Hindwings with produced angles 

 Hindwings tailed 

 Joints of the antennas of the ? with teeth of normal 



length, tails narrow . . 

 Joints of the antennas of the ? shortly toothed, tails 



broad 

 Joints of the antennas of the ? bear a single tooth 

 Forewings with the apices rounded 

 Forewings with the apices acutely falcate 



B. Hindwings with two hind-marginal nervures 

 Wing margins entire 



Antennas of the male with double teeth 

 Antennas of the male with a single tooth 

 Antennas yellowish 

 Antennas blackish 

 Body rough-haired, anus of the male with a mixtui 

 of red hairs 



Without this distinction 

 Wings dentate and sinuate 



Body stout, hindwings bluntly tailed 



Body slender, hindwings rounded 



II. Nervure IVj and IV 3 not forked but separate 



Agapema. 



Satumia. 



Polythysana. 



Antheraea. 

 Telea. 



Actias. 



Graellsia. 



Perisomena. 

 Cricula. 



Hemileucin^. 

 Coloradia. 

 Argv ranges. 



Hemileuca. 

 Pseudohazis. 



Dysdaemonia. 



I Draconipteris. 



) Teratopteris . 

 Agliid^:. 



