ZYGCENID^ AND BOMBYCID^E 



OF 



NORTH AINIERICA. 



Genus, ALYPIA, Hubner. 



"Head small ; front long-, pilose, the scales surrounding the conical 

 projection of the clypeus, but not concealing its apex. Antennae long, 

 a little thickened in the middle with scattered lateral setae. Clypeus 

 square, the front margin very obtusely rotund-pointed. First and 

 second joint of the palpi stout, pilose ; third joint long slender ; the 

 whole palpus porrect, the third joint passing beyond the front of the 

 head. 



" Thorax more than usually pilose, especially the pro-thorax and 

 patagia. Wings short and broad. The primaries are one-half as 

 broad as they are long, being broadly triangular. The nervules are 

 rather short, and arise at a greater angle with the main nervures than 

 in Eudrvas. Secondaries rounded, triangular, the outer margin full, 

 rounded at the apex, and also at the internal angle. 



"The legs have the first pair of femora and tibiaj densely spreading 

 pilose, and stretched out in front of the body, as in some Notodontians. 

 The hind pair of legs are large and long, with stout tibiae armed with 

 two unequal pairs of spines, of which the terminal pair is the shorter. 



" In coloration the species are black moths with large white and 

 yellow rounded patches upon both pairs of wings. * * * 



Packard, Proc. Ess. Inst. April, 1864. 



The following is a tabulation of the species found in the United 

 States and Canada, to which countries the genus appears to be confined. 

 a. Maculations all yellow. 



* Posterior wings with 1 spot. 



f Anterior wings with 2 spots. A. Sacramenli. 



Anterior wings with 3 spots. A. Grotei. 



* Posterior wings with 2 spots. 



f Anterior wings with 2 spots. A. dipsaci. 



