ii8 Aitnals Entomological Society of America [Vol. Ill, 



HvrKNiNAK (Deltoides) ; Setae long and stout, both on head and 



body; distance between adfrontal setae i more than half height of front, 



and they are also high up; distance between frontal punctures hardly 



more than 1-4 that between puncture and seta; front small, its setae 



usually high. 



Slender, green, a semilooper with only 14 legs, anal legs produced 

 backward as in Catocala. 



E.xample Hypena humuli. 



Arctiidae. 



Head usually with sparse secondary hair on epicrania, front and 

 maxillae, often also on labium; none on clypeus, labrum, mandibles 

 antennae, etc., or body, rarely on adfrontals (Apantesis). Epicrania 

 rounded, front large, with the punctures about as far apart as the 

 distance between a puncture and a seta; labrum normal, vi nearly 

 marginal, puncture usually very high up, and more nearly over it 

 than i: adfrontals usually very narrow and irregular, with the punc- 

 ture close to the upper seta. Maxillae usually somewhat narrower 

 than labium, the base of the mentum about twice as wide as one of the 

 submenta. Body without secondary, but with tufted hair; four warts 

 above legs on thorax, and three above spiracle on abdomen, — all the 

 tubercles below the spiracles developed as separate warts. 



Lithosiinae: Head without secondary hair, adfrontal puncture 

 close to upper seta; hair not feathered; no pencils or dense dorsal tufts; 

 adfrontals very narrow and wavy-edged; thorax with the two upper 

 warts side Ijy side as on the abdomen. Frontal punctures twice as 

 close together as distance l)etween [juncture and seta. 

 E.xample Lithosia complana. 



Arcthnae: Head with secondary hair (except Euchaetias, in 

 which the adfrontals are quite wide) ; hair serrate or feathered on body; 

 often with dense pencils and dense dorsal tufts; warts of thorax all in 

 a vertical line. Punctures of front nearly trisecting the distance 

 between the setae. 



Adfrontal j)unctures about a third way down from upper seta, adfront- 

 als l)roader; warts i and u of abdomen transversely elongate and side by 

 side, bearing dense tufts; with pencils of hair, hair very feathery. Labrum 

 with puncture rather near to setae as in the Noctuidae (When young the 

 puncture is a little nearer to the normal Arctiid position). Frontal 

 l)uiiclures decitledly 1 clow the level of the setae. 



Examples Halesidota caryae. I'igs. 119 and 120. 

 H. maculata. 

 H. tessellaris. 



Adfrontal puncture near upper seta; adfrontals, warts and hair sug- 

 gesting Halesidota; hearl without secondaries (when very young the warts 

 are as in normal Arctiidae, rather than as in Halesidota). Frontal setae 

 and ininctures on a le\cl. 



l'>xami)le Euchaetias egle. Figs. 117 and IIS. 



In the remaining genera the hair is serrate rather than feathery, with- 

 out dense tufts or pencils; puncture ia of the labrum at least as far from 

 t as ii is; epicrania and ma.xillae, at least, with secondary hair. Frontal 

 setae and punctures nearly on a level. 



