88 MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



Abdomen cylindrical, sometimes {Heterocampa pulverea) with a row of dorsnl tufts, besides 

 tlic one often present at the base on the first abdominal segaieiit. 



The Xotodontida' are associated with the Ceratocampida', Saturniidie, and Hcmilencida', both 

 as regards their larval and adult characters. In the moths the head characters are somewhat like 

 those of tlie Saturnians, the clypeus being large and longer than wide, while there are but three 

 branches of the cubital vein in either pair of wiugs. 



Larval characters. — The body is noctuiform, and either smooth and unarmed, or with simple 

 subdorsal lines, or gaily banded and spotted, and armed either with double or simple tubercles, 

 situated either on the eighth abdominal segment alone or on other abdominal segments. These 

 tubercles may be double at the end and nutant, or the single one on the eighth abdominal segment 

 may bear a horn and the larva become sphinx like. Often the body is hairy and banded, but not 

 usually (except in Dataiut) both hairy and banded. The eggs low, hemispherical, usually reticulated. 



The pupa obtected, with no vestigial characters; either unarmed or witli a well-developed 

 cremaster. It is either subten-aneau or more usually protected by a thin, rarely dense, sdken 

 cocoon. 



There are seven well-marked groups of the family which may be regarded as of the rank of 

 subfamilies. The most generalized of these groups appear to be the Pygan-ina', the Gluphisinie 

 seeming to be a side branch, which has undergone i-eduction and modification in each stage. 



SYNOPSIS OF THE SUBFAMILIES OF NOTODONTID^E. 



Head small, antennie short; palpi feeble; wings short. Larva uoctiuform; body plain green, b.anded witli yellow, 

 .sometimes with pink dorsal patches (Hiiphisiiiw 



Head broad in front; fore wings broad and falcate; antennae heavily pectinated to the tips; abdomen threo-tiilted 

 at tip. Larva with the body hidden by long wool-like hair with short sparse hairs, likeGastropacha. ApaiuJodinni 



Antenuiv ciliated; liody and wings reddish ocherous, fore wiugs crossed by from fonr to five straight parallel lines. 

 Larvn lirightly banded and very hairy ; no warts except in stage I ri/ijariiiw 



Antennre densely i)ectiuated; wings short and hard. Larva banded, either with small warts or with two large 

 dorsal tubercles Ichthxjurinm 



Antennae usually but slightly pectinated; rarely plumose; fore wings more or less rounded at apes; internal edge 

 with a tuft. Larva either smooth or with two to eight abdominal humps Xotodoniinai 



Head tufted on the vertex ; $ antenna^ filiform on the distal fourth ; vestiture of end of abdomen often forked. Larva 

 either smooth or with high nutant dorsal humps; end of body elevated; anal legs more or less slender and 

 rarely (Macrurocampa) forming stemapoda Heterocampina 



Head large, front broad, triangular; antenna? pectinated to the tips in both sexes. Larvie with the anal legs con- 

 verted into stemapoda or long filaments; the thoracic legs in the Eurasian Stauropus very long Ci-nirhuf 



Subfamily I. — Gluphisin^. 



^[oili. — Head small, not prominent, broad in front; eyes hairy; antennae shorter than usual, 

 Mitli long pectinations extending to the tips. Palpi small, feeble, slender, not reaching the front. 

 Thorax either smooth or well crested. 



Fore wings shorter and broader than usual; apex of hind wings moderately produced. No 

 subcostal cell; the first subcostal venule of the hind wings varying much in length, usually very 

 short. Legs densely scaled, the scales spreading out on each side. Abdomen short, taiiering in 

 $ rapidly to the end. 



The species are ash-gray, varying in being whiter or darker in hue. But a single genus yet 

 known. 



U(/(/. — Low, flattened, hemispherical, of smaller size than in the other subfamilies; surface- 

 of shell smooth. 



Larra. — Body noctuiform, tapering toward each end, smooth, entirely unarmed; green, with 

 two subdorsal yellow lines, and either plain green or with dorsal i)ink-red spots. Freshly hatched 

 larva with a large round head wider than the body, which is long and slender, tapering toward 

 the end, entirely unarmed, with the sutures deej), segments not wrinkled. 



Cocoon. — Very tliin and slight, spun between the leaves. 



Pupa. — Of unusual shape, being flattened, oval cylindrical; end of abdomen round and blunt;, 

 cremaster obsolete, with no spines. Darker in color than usual. 



