198 ECONOMIC ENTOMOLOGY 



American Dagger Moth, the Raspberry Dagger Moth {A. impressa Walk.), 

 the Smeared Dagger Moth (A. oUinita S. and A.), the Grey Dagger 

 Moth {A. populi Riley), and the Darkish Dagger Moth {A. morula 

 Grote). They may be distinguished from the arctiid woolly-bears by 

 the mode of distribution of the hairs. The hairs of the latter arise 

 from tubercles in clusters, while they are scattered over the surface 

 of the body in the Dagger-larvae. 



American Dagger Moth (Acronycta americana Harris). Adult. 

 — -Fore wings light grey with faint dark lines and dagger-like 

 markings. Hind wings smaller, dark brown. Body similar in color 

 to hind wings. 



Larva. — Two and one-half inches long when full grown; thickly 

 covered with short pale yellow hairs, with a pair of long black hair 

 pencils on first and third abdominal segments and a single one on the 

 eighth; head black; body greenish- white above with a subdorsal and 

 stigmatal black line; lower surface black. Common in September on 

 elm, maple, oak, hickory, ash, poplar, alder and other trees. 



(i) Underwing Moths 



The Catocalas or U'nderwings are interesting Noctuids, the adult 

 moths showing protective resemblance to the bark of trees. The larvae of 

 some of the species at least feed on the leaves of trees, C. ultronia, 

 C. grynea, on apple, plum, cherry; and C. relicta, C. car a, and C. 

 concumbens on poplar, willow and birch. 



NOTODONTEDiE (PROMENENTS) 



Hand-maid Moths {Datana Spp.). — Several species of Datana occur 

 on orchard and forest trees. 



Yellow-necked Caterpillar (Datana ministra Drury). — The larvae 

 are gregarious, and are often injurious to the leaves of apple in late 

 summer. 



Adult. — A russet-brown moth nearly 2 inches expanse; head and 

 large spot on the thorax chestnut brown; fore wings cinnamon brown 

 crossed by 3-5 darker brown lines; hind wings pale yellow. Early 

 summer, June- July. One brood a year. 



Eggs. — In flat clusters of 70-100 on surface of leaf; white and 

 round. 



