ipio] A Structural Study of Some Caterpillars 119 



Front, labium and maxillae each with several secondaries; an anal 

 tuft of long hair. 



Example Eubaphe nigricans. 



Front with several secondaries: maxillae with about ten secondaries, 

 labium with a single pair; some scattered long hair. 

 Example Hyphantria textor. 



Front, adfrontals, and maxillae each with several secondaries, labium 

 without any; adfrontal punctures about a third way down from the 

 setae; no long hair. 



Example Apantesis parthenice (?) young. Figs. 113 and IKl. 



Front without secondtiries, labium with a single pair, maxillae with 

 about six. Frontal puncture and seta closer together than clypeal 

 setae. 



Example Diacrisia virginica. 



Front with or without secondaries (at most a single pair) ; maxillae 

 with five secondaries, labium with none; clypeal setae as in the last; no 

 scattered longer hairs. 



Example Isia isabella. Figs. 114 and 121. 



Front without secondaries, stipes with six or seven; clypeal setae 

 nearer together than frontal seta and puncture. 

 Example Estigmene acraea. 



Syntomidae. 



Prolegs with hooks in a single band, all of the same length. Head 

 with secondary hair on epicrania, front, maxillae and labium, but not 

 on adfrontals, clypeus, labrum, mandibles, etc.; body with tufted hair. 

 Front quite small, the epicrania extending fully twice its height above 

 its top; frontal setae rather close together; adfrontal setae and punc- 

 ture close together, the puncture almost as near the lower as the upper 

 seta. Labrum with puncture ia decidedly nearer i than ii; labium 

 short and broad, the submenta separated by more than their width 

 at the base. Thorax with only three tufts above the legs, the upper 

 one twice as large as normal and elongate; abdomen with tufts as in 

 the Arctiidae, i forming pencils. 



Example Ctenucha virginica. Fig. 122. 



Zygaenina. 



Head retracted within the first segment of the body ; epicrania 

 with setae reduced; the vertex cleft nearly to the top of the 

 front, or with the cervical skin attached to the epicrania along a 

 similar line ; front triangular, about as high as wide, the adfrontals 

 narrow and not extending much above it ; frontal punctures about 

 trisecting the distance between the setae, a little farther apart in 

 Zygaenidae; clypeus with setae rather far apart, labrum with i 

 no higher than ii; mandible with setae close together; maxilla 

 with seta iv distinctly arising from the galea, submenta about as 

 wide as base of mentum, or membranous and indistinct; sclerite 

 h of labium broad and massive as in the butterflies. Body with 

 iv and v approximated, or forming the same wart, i and ii sep- 

 arate or forming the same wart; with tufted or secondary hair, 



