5;8 REPORT OF NEW JERSEY STATE MUSEUM. 



two weeks or less, drop's to the ground and spins a tough little cocoon, 

 in which it remains as a larva until the following April. The difficulty 

 of keeping them alive for eleven months explains why so little is known 

 of the life history. 



Family HEPIALID'^E. 



STHENOPIS Pack. 



S. argenteomaculatus Harr. Caldwell (Cr) ; Ft. Lee VI (Bt) ; Newark 

 VI (Sb); larva in roots of alder, and requires three years to mature 

 (Bt). 



S. auratus Grt. Very rare near Newark and New York; nothing is 



known of its early stages. 

 Besides the above, "S. quadriguttatus" Grt., "Hepialus mustelina" 



Pack, and "H. gracilis" G'rt. are almost certain to occur in New Jersey. 



Family MICROPTERYGID^E. 



ERIOCRANIA Zell. 



E. auricyanea Wlsm. Almost certain to occur in New Jersey. 

 E. griseocapitella Wlsm. Essex Co. IV, 21, V, 4; very rare, occasional 

 on tree trunk or flying in sunshine in open wood. 



EPIMARTYRIA Wlsm. 



E. auricrinella Wlsm. Essex Co. VI, 3-8; in some abundance in damp. 



open wood at 4 P. M., near bank of a brook, resting on stems and 



leaves of grasses or weeds from 6 to 18 inches above the ground; 



earlier than this and half an hour later not one was to be found. 



There is also an undetermined species with Mr. Daecke, taken at 



Brown's Mills V, 13. 



