DRYOCAMPA. 231 



DRYOCAMPA Harris. 



Body stout. Proboscis not visible. Antennae shorter than the 

 thorax. Abdomen hardly extending beyond the hind wings. Legs 

 stout ; hind tibiae with two minute apical spurs. Wings mode- 

 rately broad, thinly pilose. Primaries straight along the costa, 

 acuminated at the apex, hardly convex, and very oblique along 

 the exterior border. 



Male. Antennae deeply pectinated to much beyond half the 

 length, minutely serrated from thence to the tips. Female. An- 

 tennae simple. 



1. D. stigma F. Figured in Smith & Abbot, p. Ill, pi. 56. 



Reddish-ochreous. Superiors purple on the outer border and 

 internal side, thickly sprinkled with blackish dots ; a small white 

 spot in the centre and crossed from the tip with a narrow purple 

 band. Body deep yellow; the under side similar though paler 

 and not having so many black spots. Inferiors with a narrow 

 transverse purple red band ; border sprinkled with a few black 

 dots. Expands from one inch and three-quarters to two inches 

 and three-quarters. 



Larva yellow, with black thorns on the back. Feeds on the oak. 



United States. 



2. D. senatoria F. 



Ochre-yellow. Wings faintly tinged with purplish-red, espe- 

 cially on the front and hind margins, and crossed by a narrow 

 purple-brown band behind the middle. Superiors sprinkled with 

 blackish dots ; a small white spot near the middle. The male is 

 much smaller than the female ; its wings are thinner and more 

 tinged with purple-red. Expands about an inch and three-quar- 

 ters ; the females two and a half or more. 



Larva black, with four narrow ochre-yellow stripes along the 

 back and two on each side. On each segment about six short 

 thorns or sharp points, besides two on the top of the second seg- 

 ment, which are long and filiform, but no.t flexible. 



United States. 



