CATALOGUE OF INSECTS. 



489 



PSYCHE Ochs. 



confederata Grt. and Rob. Staten Island, VI (Ds), Jersey City Hts. (Sb), 

 Newark (Soc), Ft. Lee (Bt). The larva lives on the bark of oak and 

 chestnut in a little silken case. Mr. Beutenmuller records it as common 

 locally, and adds that it is double-brooded. 



THYRIDOPTERYX Steph. 



&£ 



Fig. 231. — Bag-worm, Thyridopteryx ephemertzformis : a, larva; b, 



male pupa ; c, adult female ; d, adult male ; e, bag cut open 



to show the egg mass ; f, bag carried by feeding 



caterpillar ; g, young larva; in their first case. 



T. ephemeraeformis Steph. The common " bag-worm " or "drop-worm." 

 Occurs throughout the State on a very large variety of fruit and shade 

 trees. It is particularly injurious to Arbor vitce hedges, which are often 

 entirely killed by it. The bags containing eggs hang on the trees all 

 winter, hatch early in the season, and the adults appear in late August 

 and September. Among remedial measures, picking off and destroying 

 all bags that are to be seen in winter takes first rank. If the larvae are 

 present on arbor vitse, a strong arsenate of lead mixture should be used 

 to kill them, as this does not endanger the foliage. 



Family LACOSOMIDJE. 



This family resembles the preceding in general structure, but has the wings 

 closely scaled and fully developed in both sexes. The larviij live similarly, but 

 the bag is always open at both ends. 



