26 PACKARD, NOTES ON THE 



The mandibles of Alypia are equilaterally triangular, as is also 

 the labrum. In Eudryas these parts, at least in the specimens 

 at hand, are much less developed. Beneath, the head of Eudryas 

 is narrower between the eyes, and the labium is larger and longer 

 than that in Alypia. The antennae of Alypia are most Zygaenid 

 in character, being swollen a little beyond their middle : those 

 of Eudryas are Noctuid, being filiform, tapering gradually toward 

 the tip, and setose. The palpi of the two genera do not differ 

 essentially, though in Eudryas they are stoutest, most thickly 

 scaled, and the most depressed, being porrect, while the third 

 joint does not go so far beyond the front as in Alypia. They 

 also agree in the structure of the legs : in both the fore tibiae 

 are thickly tufted, but especially so in Eudryas, wherein this 

 genus resembles closely some Notodontians. In both genera 

 also, the hind tibiae are large and thick with four nearly equal 

 spurs, but longer and more slender in Eudryas. 



The wings agree very nearly in outline. In Eudryas the 

 costa of the primaries is straighter, the apex more rectangular 

 and also the outer edge is straighter than in the other genus. 

 The neuration is very similar in both genera, but Eudryas has 

 its nervules longer, arising at about the middle of the wing, 

 while in Alypia their origin is carried farther out beyond the 

 middle ; thug the first, second and third subcostals are farther 

 apart at their origins, longer and more parallel to the costa, 

 since by their decrease in length in Alypia, they go to the costa 

 and apex more rapidly and at a greater angle. In Eudryas the 

 third subcostal subdivides at the inner third of its length, 

 but .in Alypia nearer its middle. The intercostal space has the 

 inner side shorter than the outer in Eudryas, while in Alypia 

 it is longer than the outer side. The fifth subcostal remains 

 in the former genus attached to its nervure, while in Alypia it 

 is detached, being removed towards the middle of the median 

 area. The nervules of the median are more approximate at 

 their origins in Eudryas. The first and second median are 

 nearest together at their origin in the last named genus ; the 

 second and third are nearest together in Alypia, where also the 

 median area of the wing is shorter and broader than in Eudryas, 

 which has a longitudinal crease reaching from the base of the 

 wing to the point of juncture of the two discal nervules. 



The secondaries also agree remarkably well in their form and 

 neuration. The nervules are still very long. But the first 

 median in Eudryas is continuous with its nervure, and its origin 



